基于 Kubernetes v1.16.2 之 metrics-server 部署

简单介绍

如果使用kubernetes的自动扩容功能的话，那首先得有一个插件，然后该插件将收集到的信息（cpu、memory..）与自动扩容的设置的值进行比对，自动调整pod数量。关于该插件，在kubernetes的早些版本中采用的是heapster，1.13版本正式发布后，丢弃了heapster，官方推荐采用metrics-sever。

测试环境

这是之前部署的环境现在我升级到了Kubernetes v1.16.2，升级方案可以参考

展开全文 >>

openstack instance vm_power_state 状态置为 NOSTATE

openstack 上的instance运行正常，但是power_state状态为NOSTATE，导致instance热迁移失败

现象

1、再一次热迁移时候发现迁移时候报以下错误

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# openstack server migrate --live node-53 86487ef4-cc12-4be6-995e-46f5ac093901
Cannot 'os-migrateLive' instance 86487ef4-cc12-4be6-995e-46f5ac093901 while it is in power_state 0 (HTTP 409) (Request-ID: req-6c14e0ee-c3df-42de-873d-9ecc8ad215cc)

2、查看实例，发现虚拟机运行正常，但是 power_state 为 NOSTATE

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# openstack server show 86487ef4-cc12-4be6-995e-46f5ac093901
+-------------------------------------+----------------------------------------------------------------+
| Field                               | Value                                                          |
+-------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig                   | MANUAL                                                         |
| OS-EXT-AZ:availability_zone         | m_cpu+san                                                      |
| OS-EXT-SRV-ATTR:host                | node-27                                                        |
| OS-EXT-SRV-ATTR:hypervisor_hostname | node-27                                                        |
| OS-EXT-SRV-ATTR:instance_name       | instance-000071aa                                              |
| OS-EXT-STS:power_state              | NOSTATE                                                        |
| OS-EXT-STS:task_state               | None                                                           |
| OS-EXT-STS:vm_state                 | active                                                         |
| OS-SRV-USG:launched_at              | 2018-09-21T05:40:36.000000                                     |
| OS-SRV-USG:terminated_at            | None                                                           |
| accessIPv4                          |                                                                |
| accessIPv6                          |                                                                |
| addresses                           | vlan_10.122.44.0/23=10.122.45.53                               |
| config_drive                        | True                                                           |
| created                             | 2018-09-21T05:40:31Z                                           |
| flavor                              | 16-64-100 (1cbe4ea1-8a67-4027-afd4-8f31a8b94851)               |
| hostId                              | 2730fa3d62e347ddb67e155f6eed973787a868c82316f7e6ba641b10       |
| id                                  | 86487ef4-cc12-4be6-995e-46f5ac093901                           |
| image                               | lenovo-centos-7-release (b9f8f864-4217-4ac6-a116-62ecfa0fc074) |
| key_name                            | None                                                           |
| name                                | SLP3YM7HRCX                                                    |
| progress                            | 100                                                            |
| project_id                          | e992715df18a417997c068e5f9834b0f                               |
| properties                          |                                                                |
| security_groups                     | name='default'                                                 |
| status                              | ACTIVE                                                         |
| updated                             | 2019-10-09T07:58:58Z                                           |
| user_id                             | af518aeb935c4d258f8cb7d302c83797                               |
| volumes_attached                    | id='a821856b-409f-4e6e-becd-eb4b2344c7d8'                      |
+-------------------------------------+----------------------------------------------------------------+

查找原因

列出该虚拟机的历史操作

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# nova instance-action-list 86487ef4-cc12-4be6-995e-46f5ac093901
+----------------+------------------------------------------+---------+----------------------------+
| Action         | Request_ID                               | Message | Start_Time                 |
+----------------+------------------------------------------+---------+----------------------------+
| create         | req-4d01a466-ce7a-48a9-b575-e129b61bcc30 | -       | 2018-09-21T05:40:30.000000 |
| live-migration | req-2d93bc73-e43f-4ca6-88fc-a6ad1a4021a6 | -       | 2018-09-21T05:44:47.000000 |
| live-migration | req-7fcbfb15-7e3c-471d-8ea5-020d438d23c3 | -       | 2019-03-24T13:00:30.000000 |
| live-migration | req-2b009c4f-caef-4d90-81fd-d480c1b9efad | Error   | 2019-10-09T07:00:13.000000 |
| live-migration | req-b364724b-6b28-4d5f-8f14-05d1c4abeceb | Error   | 2019-10-09T07:07:37.000000 |
| live-migration | req-8669d3b1-e57e-4b35-8d40-a110b64f47c8 | Error   | 2019-10-09T07:29:13.000000 |
| live-migration | req-ecec98ca-3777-4ca3-afcd-83e36381e038 | Error   | 2019-10-09T07:55:12.000000 |
| live-migration | req-6378f839-89c0-43c0-8a65-40e5b775283c | Error   | 2019-10-09T07:58:14.000000 |
| live-migration | req-e966caa7-06e5-4a29-a371-517d98c37121 | Error   | 2019-10-09T07:58:58.000000 |
| live-migration | req-6c14e0ee-c3df-42de-873d-9ecc8ad215cc | Error   | 2019-10-09T08:31:47.000000 |
+----------------+------------------------------------------+---------+----------------------------+

列出该实例的迁移记录

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# nova  migration-list|grep 86487ef4-cc12-4be6-995e-46f5ac093901
| 84892 | -           | -         | node-27        | node-29            | -            | error         | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2019-10-09T07:07:37.000000 | 2019-10-09T07:07:37.000000 | live-migration |
| 54307 | -           | -         | node-27        | node-53            | -            | error         | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2019-03-24T13:00:30.000000 | 2019-03-24T17:10:10.000000 | live-migration |
| 84904 | -           | -         | node-27        | node-53            | -            | error         | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2019-10-09T07:29:13.000000 | 2019-10-09T07:29:13.000000 | live-migration |
| 84913 | -           | -         | node-27        | node-53            | -            | error         | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2019-10-09T07:55:12.000000 | 2019-10-09T07:55:12.000000 | live-migration |
| 84919 | -           | -         | node-27        | node-53            | -            | error         | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2019-10-09T07:58:14.000000 | 2019-10-09T07:58:14.000000 | live-migration |
| 84922 | -           | -         | node-27        | node-53            | -            | error         | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2019-10-09T07:58:58.000000 | 2019-10-09T07:58:58.000000 | live-migration |
| 84931 | -           | -         | node-27        | node-53            | -            | error         | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2019-10-09T08:31:47.000000 | 2019-10-09T08:31:47.000000 | live-migration |
| 84889 | -           | -         | node-27        | node-89            | -            | error         | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2019-10-09T07:00:13.000000 | 2019-10-09T07:00:13.000000 | live-migration |
| 42241 | -           | -         | node-33        | node-27            | -            | completed     | 86487ef4-cc12-4be6-995e-46f5ac093901 | 189        | 189        | 2018-09-21T05:44:48.000000 | 2018-09-21T05:45:13.000000 | live-migration |
可以看到该实例从node-27节点迁移到node-85、node-53、node-29节点均为迁移成功
查看instance所在的节点
# ssh node-27
[email protected]:~# virsh list --all|grep instance-000071aa 
[email protected]:~# exit
logout
Connection to node-27 closed.
# ssh node-53
[email protected]:~#  virsh list --all|grep instance-000071aa
 91    instance-000071aa              running
[email protected]:~# exit
logout
Connection to node-53 closed.
# openstack server show 86487ef4-cc12-4be6-995e-46f5ac093901
+-------------------------------------+----------------------------------------------------------------+
| Field                               | Value                                                          |
+-------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig                   | MANUAL                                                         |
| OS-EXT-AZ:availability_zone         | m_cpu+san                                                      |
| OS-EXT-SRV-ATTR:host                | node-27                                                        |
| OS-EXT-SRV-ATTR:hypervisor_hostname | node-27                                                        |
| OS-EXT-SRV-ATTR:instance_name       | instance-000071aa                                              |
| OS-EXT-STS:power_state              | NOSTATE                                                        |
| OS-EXT-STS:task_state               | None                                                           |
| OS-EXT-STS:vm_state                 | active                                                         |
| OS-SRV-USG:launched_at              | 2018-09-21T05:40:36.000000                                     |
| OS-SRV-USG:terminated_at            | None                                                           |
| accessIPv4                          |                                                                |
| accessIPv6                          |                                                                |
| addresses                           | vlan_10.122.44.0/23=10.122.45.53                               |
| config_drive                        | True                                                           |
| created                             | 2018-09-21T05:40:31Z                                           |
| flavor                              | 16-64-100 (1cbe4ea1-8a67-4027-afd4-8f31a8b94851)               |
| hostId                              | 2730fa3d62e347ddb67e155f6eed973787a868c82316f7e6ba641b10       |
| id                                  | 86487ef4-cc12-4be6-995e-46f5ac093901                           |
| image                               | lenovo-centos-7-release (b9f8f864-4217-4ac6-a116-62ecfa0fc074) |
| key_name                            | None                                                           |
| name                                | SLP3YM7HRCX                                                    |
| progress                            | 100                                                            |
| project_id                          | e992715df18a417997c068e5f9834b0f                               |
| properties                          |                                                                |
| security_groups                     | name='default'                                                 |
| status                              | ACTIVE                                                         |
| updated                             | 2019-10-09T08:31:47Z                                           |
| user_id                             | af518aeb935c4d258f8cb7d302c83797                               |
| volumes_attached                    | id='a821856b-409f-4e6e-becd-eb4b2344c7d8'                      |
+-------------------------------------+----------------------------------------------------------------+
[email protected]:~# mysql -unova -pnova
MariaDB [(none)]> select * from nova.instances where uuid='86487ef4-cc12-4be6-995e-46f5ac093901'\G;
*************************** 1. row ***************************
              created_at: 2018-09-21 05:40:31
              updated_at: 2019-10-09 08:31:47
              deleted_at: NULL
                      id: 29098
             internal_id: NULL
                 user_id: af518aeb935c4d258f8cb7d302c83797
              project_id: e992715df18a417997c068e5f9834b0f
               image_ref: b9f8f864-4217-4ac6-a116-62ecfa0fc074
               kernel_id: 
              ramdisk_id: 
            launch_index: 0
                key_name: NULL
                key_data: NULL
             power_state: 0
                vm_state: active
               memory_mb: 65536
                   vcpus: 16
                hostname: slp3ym7hrcx
                    host: node-27
               user_data: NULL
          reservation_id: r-o8dr8ibn
             launched_at: 2018-09-21 05:40:36
           terminated_at: NULL
            display_name: SLP3YM7HRCX
     display_description: SLP3YM7HRCX
       availability_zone: no_san
                  locked: 0
                 os_type: NULL
             launched_on: node-33
        instance_type_id: 189
                 vm_mode: NULL
                    uuid: 86487ef4-cc12-4be6-995e-46f5ac093901
            architecture: NULL
        root_device_name: /dev/vda
            access_ip_v4: NULL
            access_ip_v6: NULL
            config_drive: True
              task_state: NULL
default_ephemeral_device: NULL
     default_swap_device: NULL
                progress: 100
        auto_disk_config: 0
      shutdown_terminate: 0
       disable_terminate: 0
                 root_gb: 100
            ephemeral_gb: 0
               cell_name: NULL
                    node: node-27
                 deleted: 0
               locked_by: NULL
                 cleaned: 1
      ephemeral_key_uuid: NULL
1 row in set (0.00 sec)
ERROR: No query specified

发现实际instance启动在node-53节点上，但是数据库记录在node-27节点上

manager.py 捕获到 InstanceNotFound 设置 vm_power_state=NOSTATE

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/usr/lib/python2.7/dist-packages/nova/compute/manager.py
    def _query_driver_power_state_and_sync(self, context, db_instance):
        if db_instance.task_state is not None:
            LOG.info(_LI("During sync_power_state the instance has a "
                         "pending task (%(task)s). Skip."),
                     {'task': db_instance.task_state}, instance=db_instance)
            return
        # No pending tasks. Now try to figure out the real vm_power_state.
        try:
            vm_instance = self.driver.get_info(db_instance)
            vm_power_state = vm_instance.state
        except exception.InstanceNotFound:         # 可以看到如果InstanceNotFound
            vm_power_state = power_state.NOSTATE   # power_state设置为NOSTATE
        # Note(maoy): the above get_info call might take a long time,
        # for example, because of a broken libvirt driver.
        try:
            self._sync_instance_power_state(context,
                                            db_instance,
                                            vm_power_state,
                                            use_slave=True)
        except exception.InstanceNotFound:
            # NOTE(hanlind): If the instance gets deleted during sync,
            # silently ignore.
            pass

得到原因

由于之前 migrate ERROR 导致 instance 实际启动的节点和数据库记录的节点不一致，comoute 通过 manager.py 捕获到 InstanceNotFound， 所以把 vm_power_state 状态置为 NOSTATE

解决方案

更新数据库，将数据库中的instance对应的host、node更新成实际instance启动的节点信息。硬重启虚拟机

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[email protected]:~# mysql -unova -pnova
MariaDB [(none)]> update nova.instances set host='node-53' where uuid='86487ef4-cc12-4be6-995e-46f5ac093901'\G;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0
ERROR: No query specified
MariaDB [(none)]> update nova.instances set node='node-53' where uuid='86487ef4-cc12-4be6-995e-46f5ac093901'\G;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0
ERROR: No query specified
MariaDB [(none)]> select * from nova.instances where uuid='86487ef4-cc12-4be6-995e-46f5ac093901'\G;
*************************** 1. row ***************************
              created_at: 2018-09-21 05:40:31
              updated_at: 2019-10-09 08:31:47
              deleted_at: NULL
                      id: 29098
             internal_id: NULL
                 user_id: af518aeb935c4d258f8cb7d302c83797
              project_id: e992715df18a417997c068e5f9834b0f
               image_ref: b9f8f864-4217-4ac6-a116-62ecfa0fc074
               kernel_id: 
              ramdisk_id: 
            launch_index: 0
                key_name: NULL
                key_data: NULL
             power_state: 0
                vm_state: active
               memory_mb: 65536
                   vcpus: 16
                hostname: slp3ym7hrcx
                    host: node-53
               user_data: NULL
          reservation_id: r-o8dr8ibn
             launched_at: 2018-09-21 05:40:36
           terminated_at: NULL
            display_name: SLP3YM7HRCX
     display_description: SLP3YM7HRCX
       availability_zone: no_san
                  locked: 0
                 os_type: NULL
             launched_on: node-33
        instance_type_id: 189
                 vm_mode: NULL
                    uuid: 86487ef4-cc12-4be6-995e-46f5ac093901
            architecture: NULL
        root_device_name: /dev/vda
            access_ip_v4: NULL
            access_ip_v6: NULL
            config_drive: True
              task_state: NULL
default_ephemeral_device: NULL
     default_swap_device: NULL
                progress: 100
        auto_disk_config: 0
      shutdown_terminate: 0
       disable_terminate: 0
                 root_gb: 100
            ephemeral_gb: 0
               cell_name: NULL
                    node: node-53
                 deleted: 0
               locked_by: NULL
                 cleaned: 1
      ephemeral_key_uuid: NULL
1 row in set (0.00 sec)
ERROR: No query specified
MariaDB [(none)]> exit
Bye
# openstack server show 86487ef4-cc12-4be6-995e-46f5ac093901
+-------------------------------------+----------------------------------------------------------------+
| Field                               | Value                                                          |
+-------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig                   | MANUAL                                                         |
| OS-EXT-AZ:availability_zone         | no_san                                                         |
| OS-EXT-SRV-ATTR:host                | node-53                                                        |
| OS-EXT-SRV-ATTR:hypervisor_hostname | node-53                                                        |
| OS-EXT-SRV-ATTR:instance_name       | instance-000071aa                                              |
| OS-EXT-STS:power_state              | NOSTATE                                                        |
| OS-EXT-STS:task_state               | None                                                           |
| OS-EXT-STS:vm_state                 | active                                                         |
| OS-SRV-USG:launched_at              | 2018-09-21T05:40:36.000000                                     |
| OS-SRV-USG:terminated_at            | None                                                           |
| accessIPv4                          |                                                                |
| accessIPv6                          |                                                                |
| addresses                           | vlan_10.122.44.0/23=10.122.45.53                               |
| config_drive                        | True                                                           |
| created                             | 2018-09-21T05:40:31Z                                           |
| flavor                              | 16-64-100 (1cbe4ea1-8a67-4027-afd4-8f31a8b94851)               |
| hostId                              | f5274ebe433297bc376a4ce09151591735a04d2b6762280866de2729       |
| id                                  | 86487ef4-cc12-4be6-995e-46f5ac093901                           |
| image                               | lenovo-centos-7-release (b9f8f864-4217-4ac6-a116-62ecfa0fc074) |
| key_name                            | None                                                           |
| name                                | SLP3YM7HRCX                                                    |
| progress                            | 100                                                            |
| project_id                          | e992715df18a417997c068e5f9834b0f                               |
| properties                          |                                                                |
| security_groups                     | name='default'                                                 |
| status                              | ACTIVE                                                         |
| updated                             | 2019-10-09T08:31:47Z                                           |
| user_id                             | af518aeb935c4d258f8cb7d302c83797                               |
| volumes_attached                    | id='a821856b-409f-4e6e-becd-eb4b2344c7d8'                      |
+-------------------------------------+----------------------------------------------------------------+
# nova reboot --hard 86487ef4-cc12-4be6-995e-46f5ac093901
# openstack  server show 86487ef4-cc12-4be6-995e-46f5ac093901
+-------------------------------------+----------------------------------------------------------------+
| Field                               | Value                                                          |
+-------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig                   | MANUAL                                                         |
| OS-EXT-AZ:availability_zone         | no_san                                                         |
| OS-EXT-SRV-ATTR:host                | node-53                                                        |
| OS-EXT-SRV-ATTR:hypervisor_hostname | node-53                                                        |
| OS-EXT-SRV-ATTR:instance_name       | instance-000071aa                                              |
| OS-EXT-STS:power_state              | Running                                                        |
| OS-EXT-STS:task_state               | None                                                           |
| OS-EXT-STS:vm_state                 | active                                                         |
| OS-SRV-USG:launched_at              | 2018-09-21T05:40:36.000000                                     |
| OS-SRV-USG:terminated_at            | None                                                           |
| accessIPv4                          |                                                                |
| accessIPv6                          |                                                                |
| addresses                           | vlan_10.122.44.0/23=10.122.45.53                               |
| config_drive                        | True                                                           |
| created                             | 2018-09-21T05:40:31Z                                           |
| flavor                              | 16-64-100 (1cbe4ea1-8a67-4027-afd4-8f31a8b94851)               |
| hostId                              | 4bfe001f6fa4d443f283121b56139ef8bfbff47be8106387cc19edc6       |
| id                                  | 86487ef4-cc12-4be6-995e-46f5ac093901                           |
| image                               | lenovo-centos-7-release (b9f8f864-4217-4ac6-a116-62ecfa0fc074) |
| key_name                            | None                                                           |
| name                                | SLP3YM7HRCX                                                    |
| progress                            | 0                                                              |
| project_id                          | e992715df18a417997c068e5f9834b0f                               |
| properties                          |                                                                |
| security_groups                     | name='default'                                                 |
| status                              | ACTIVE                                                         |
| updated                             | 2019-10-09T10:04:19Z                                           |
| user_id                             | af518aeb935c4d258f8cb7d302c83797                               |
| volumes_attached                    | id='a821856b-409f-4e6e-becd-eb4b2344c7d8'                      |
|                                     | id='ff7d2dad-1954-4906-ae18-95c76a09b442'                      |
+-------------------------------------+----------------------------------------------------------------+
# openstack server migrate --live node-89 86487ef4-cc12-4be6-995e-46f5ac093901
# openstack  server show 86487ef4-cc12-4be6-995e-46f5ac093901
+-------------------------------------+----------------------------------------------------------------+
| Field                               | Value                                                          |
+-------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig                   | MANUAL                                                         |
| OS-EXT-AZ:availability_zone         | Contingency                                                    |
| OS-EXT-SRV-ATTR:host                | node-89                                                        |
| OS-EXT-SRV-ATTR:hypervisor_hostname | node-89                                                        |
| OS-EXT-SRV-ATTR:instance_name       | instance-000071aa                                              |
| OS-EXT-STS:power_state              | Running                                                        |
| OS-EXT-STS:task_state               | None                                                           |
| OS-EXT-STS:vm_state                 | active                                                         |
| OS-SRV-USG:launched_at              | 2018-09-21T05:40:36.000000                                     |
| OS-SRV-USG:terminated_at            | None                                                           |
| accessIPv4                          |                                                                |
| accessIPv6                          |                                                                |
| addresses                           | vlan_10.122.44.0/23=10.122.45.53                               |
| config_drive                        | True                                                           |
| created                             | 2018-09-21T05:40:31Z                                           |
| flavor                              | 16-64-100 (1cbe4ea1-8a67-4027-afd4-8f31a8b94851)               |
| hostId                              | 4bfe001f6fa4d443f283121b56139ef8bfbff47be8106387cc19edc6       |
| id                                  | 86487ef4-cc12-4be6-995e-46f5ac093901                           |
| image                               | lenovo-centos-7-release (b9f8f864-4217-4ac6-a116-62ecfa0fc074) |
| key_name                            | None                                                           |
| name                                | SLP3YM7HRCX                                                    |
| progress                            | 0                                                              |
| project_id                          | e992715df18a417997c068e5f9834b0f                               |
| properties                          |                                                                |
| security_groups                     | name='default'                                                 |
| status                              | ACTIVE                                                         |
| updated                             | 2019-10-09T10:04:19Z                                           |
| user_id                             | af518aeb935c4d258f8cb7d302c83797                               |
| volumes_attached                    | id='a821856b-409f-4e6e-becd-eb4b2344c7d8'                      |
|                                     | id='ff7d2dad-1954-4906-ae18-95c76a09b442'                      |
+-------------------------------------+----------------------------------------------------------------+

展开全文 >>

使用kubeadm升级kubernetes集群

kubeadm升级k8s集群(v1.15.3 to v1.16.0版)

Kubernetes在2019年9月18日发布了年度的第三个版本1.16,本篇文章介绍使用kubeadm升级现在有的集群到v1.16.0。

Kubernetes 1.16版本的发布徽章

Kubernetes 1.16版本的发布徽章

查看k8s集群版本

查看当前的k8s版本

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[[email protected] ~]# kubectl get nodes
NAME         STATUS   ROLES    AGE   VERSION
k8s-master   Ready    master   20d   v1.15.3
k8s-node1    Ready    <none>   20d   v1.15.3
k8s-node2    Ready    <none>   20d   v1.15.3
k8s-node3    Ready    <none>   20d   v1.15.3

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[[email protected] ~]# kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2", GitTreeState:"clean", BuildDate:"2019-08-19T11:11:18Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
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[[email protected] ~]# kubelet --version
Kubernetes v1.15.3
[[email protected] ~]# systemctl status kubelet.service |grep Active
   Active: active (running) since Fri 2019-08-30 07:26:33 EDT; 3 weeks 0 days ago
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[[email protected] yum.repos.d]# kubectl version
Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2", GitTreeState:"clean", BuildDate:"2019-08-19T11:13:54Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2", GitTreeState:"clean", BuildDate:"2019-08-19T11:05:50Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}

查看版本支持

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[[email protected] yum.repos.d]# yum list kubelet kubeadm kubectl
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
Installed Packages
kubeadm.x86_64                                                        1.15.3-0                                                        @kubernetes
kubectl.x86_64                                                        1.15.3-0                                                        @kubernetes
kubelet.x86_64                                                        1.15.3-0                                                        @kubernetes
Available Packages
kubeadm.x86_64                                                        1.16.0-0                                                        kubernetes 
kubectl.x86_64                                                        1.16.0-0                                                        kubernetes 
kubelet.x86_64                                                        1.16.0-0                                                        kubernetes

升级kubelet kubeadm kubectl版本到1.16.0(每个节点都执行)

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[[email protected] ~]# yum install -y kubelet kubeadm kubectl
# systemctl daemon-reload && systemctl restart kubelet && systemctl status kubelet
[[email protected] ~]# kubectl version
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:36:53Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.3", GitCommit:"2d3c76f9091b6bec110a5e63777c332469e0cba2", GitTreeState:"clean", BuildDate:"2019-08-19T11:05:50Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
[[email protected] ~]# kubelet --version
Kubernetes v1.16.0
[[email protected] ~]# kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:34:01Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}

升级k8s集群

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[[email protected] ~]# kubectl get nodes
NAME         STATUS   ROLES    AGE   VERSION
k8s-master   Ready    master   21d   v1.15.3
k8s-node1    Ready    <none>   20d   v1.15.3
k8s-node2    Ready    <none>   20d   v1.15.3
k8s-node3    Ready    <none>   20d   v1.15.3

升级集群

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[[email protected] ~]# kubeadm config print init-defaults > kubeadm1.16.yaml
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[[email protected] ~]# cat kubeadm1.16.yaml 
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 10.122.17.200
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  name: k8s-master
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.16.0
networking:
  dnsDomain: cluster.local
  podSubnet: 192.168.0.0/16
  serviceSubnet: 10.96.0.0/12
scheduler: {}
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
mode: ipvs
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[[email protected] ~]# kubeadm upgrade apply --config kubeadm1.16.yaml
.......
.......
.......
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy
[upgrade/successful] SUCCESS! Your cluster was upgraded to "v1.16.0". Enjoy!
[upgrade/kubelet] Now that your control plane is upgraded, please proceed with upgrading your kubelets if you haven't already done so.
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[[email protected] ~]# kubectl version
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:36:53Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:27:17Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
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[[email protected] ~]# yum clean all
[[email protected] ~]# yum install -y kubelet kubeadm kubectl
systemctl daemon-reload && systemctl restart kubelet && systemctl status kubelet
[[email protected] ~]# kubectl version
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:36:53Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
The connection to the server localhost:8080 was refused - did you specify the right host or port?
[[email protected] ~]# kubelet --version
Kubernetes v1.16.0
[[email protected] ~]# kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:34:01Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
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[[email protected] ~]# kubectl version
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:36:53Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.0", GitCommit:"2bd9643cee5b3b3a5ecbd3af49d09018f0773c77", GitTreeState:"clean", BuildDate:"2019-09-18T14:27:17Z", GoVersion:"go1.12.9", Compiler:"gc", Platform:"linux/amd64"}
[[email protected] ~]# kubectl get nodes
NAME         STATUS   ROLES    AGE   VERSION
k8s-master   Ready    master   21d   v1.16.0
k8s-node1    Ready    <none>   21d   v1.16.0
k8s-node2    Ready    <none>   21d   v1.16.0
k8s-node3    Ready    <none>   21d   v1.16.0
[[email protected] ~]# kubectl get pod -A
NAMESPACE       NAME                                        READY   STATUS    RESTARTS   AGE
default         curl-6bf6db5c4f-dqw9x                       1/1     Running   2          20d
ingress-nginx   nginx-ingress-controller-6956498fcf-jkzbs   1/1     Running   1          16d
kube-system     calico-kube-controllers-65b8787765-hx9cr    1/1     Running   1          21d
kube-system     calico-node-2rlsz                           1/1     Running   1          21d
kube-system     calico-node-5vz46                           1/1     Running   1          21d
kube-system     calico-node-6szsd                           1/1     Running   1          21d
kube-system     calico-node-s5nmr                           1/1     Running   1          21d
kube-system     calicoctl                                   1/1     Running   1          20d
kube-system     coredns-58cc8c89f4-cnl45                    1/1     Running   1          26m
kube-system     coredns-58cc8c89f4-nj8hr                    1/1     Running   1          9m4s
kube-system     etcd-k8s-master                             1/1     Running   0          6m35s
kube-system     kube-apiserver-k8s-master                   1/1     Running   0          6m30s
kube-system     kube-controller-manager-k8s-master          1/1     Running   0          6m35s
kube-system     kube-proxy-52mbf                            1/1     Running   1          26m
kube-system     kube-proxy-gf75r                            1/1     Running   1          25m
kube-system     kube-proxy-hbvjf                            1/1     Running   1          26m
kube-system     kube-proxy-zppdf                            1/1     Running   1          26m
kube-system     kube-scheduler-k8s-master                   1/1     Running   0          6m31s
kube-system     kubernetes-dashboard-5dc4c54b55-c7sv2       1/1     Running   1          20d
[[email protected] ~]# kubectl get pod
NAME                    READY   STATUS    RESTARTS   AGE
curl-6bf6db5c4f-dqw9x   1/1     Running   2          20d

验证cordns

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[[email protected] ~]# kubectl get pod
NAME                    READY   STATUS    RESTARTS   AGE
curl-6bf6db5c4f-dqw9x   1/1     Running   2          20d
[[email protected] ~]# kubectl exec -it curl-6bf6db5c4f-dqw9x -- /bin/sh
/bin/sh: shopt: not found
[ [email protected]:/ ]$ nslookup kubernetes.default
Server:    10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name:      kubernetes.default
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local
[ [email protected]:/ ]$ exit
[[email protected] ~]#

未解决的问题

kubectl get cs显示为unknown
错误提示信息示例如下:

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# kubectl get cs
NAME                 AGE
scheduler            <unknown>
controller-manager   <unknown>
etcd-0               <unknown>

这个问题似乎对集群没有太大的影响，暂未解决，后续愿意确认之后会继续更新，如果有大神知道如何解决，请指点。

参考链接

1、 https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-upgrade/
2、 http://www.sohu.com/a/342118551_198222
3、 https://www.linuxidc.com/Linux/2019-09/160728.htm

展开全文 >>

在k8s上部署ingress-nginx并使用

[TOC]

部署nginx-ingress

环境准备

准备一套k8s环境

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# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
controller-manager   Healthy   ok                  
scheduler            Healthy   ok                  
etcd-0               Healthy   {"health":"true"}   
# kubectl cluster-info
Kubernetes master is running at https://10.122.17.200:6443
KubeDNS is running at https://10.122.17.200:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
# kubectl get nodes
NAME         STATUS   ROLES    AGE    VERSION
k8s-master   Ready    master   4d1h   v1.15.3
k8s-node1    Ready    <none>   4d1h   v1.15.3
k8s-node2    Ready    <none>   4d     v1.15.3
k8s-node3    Ready    <none>   4d     v1.15.3

下载安装nginx-ingress的yaml文件

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# wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/mandatory.yaml

设置nginx-ingress-controller调度节点

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# kubectl label nodes k8s-node1 hosts=nginx-ingress-controller
# kubectl get node -l hosts=nginx-ingress-controller --show-labels 
NAME        STATUS   ROLES    AGE    VERSION   LABELS
k8s-node1   Ready    <none>   4d6h   v1.15.3   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,hosts=nginx-ingress-controller,kubernetes.io/arch=amd64,kubernetes.io/hostname=k8s-node1,kubernetes.io/os=linux

修改mandatory.yaml文件

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# vim mandatory.yaml
......
apiVersion: apps/v1
kind: Deployment
......
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: ingress-nginx
      app.kubernetes.io/part-of: ingress-nginx
  template:
    ......
    spec:
      hostNetwork: true    # 使用hostNetwork 模式
      nodeSelector:        # 使用nodeSelector
        hosts: nginx-ingress-controller   # 选择标签为hosts=nginx-ingress-controller节点
      serviceAccountName: nginx-ingress-serviceaccount
      containers:
        - name: nginx-ingress-controller
          image: lijiawang/nginx-ingress-controller:0.25.1   # 更换镜像源
		  ......
......

执行

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# kubectl apply -f mandatory.yaml
# kubectl get pod -n ingress-nginx
# kubectl get pod -n ingress-nginx -o wide
NAME                                        READY   STATUS    RESTARTS   AGE   IP              NODE        NOMINATED NODE   READINESS GATES
nginx-ingress-controller-6956498fcf-jkzbs   1/1     Running   0          55s   10.122.17.204   k8s-node1   <none>           <none>

可以看到nginx-ingress-controller-6956498fcf-jkzbs POD 调度到了打好标记的k8s-node1。

登录nginx-ingress-controller节点验证

因为k8s-node1为nginx-ingress-controller节点，所有登录k8s-node1节点即可

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# ssh k8s-node1
[[email protected] ~]# netstat -lntp|grep 80
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      5901/nginx: master  
tcp6       0      0 :::80                   :::*                    LISTEN      5901/nginx: master  
[[email protected] ~]# netstat -lntp|grep 443
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      5901/nginx: master  
tcp6       0      0 :::443                  :::*                    LISTEN      5901/nginx: master  
[[email protected] ~]# exit
logout
Connection to k8s-node1 closed.

部署应用

部署测试应用

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# cat deploy-demon.yaml 
apiVersion: v1
kind: Service
metadata:
  name: myapp
  namespace: default
spec:
  selector:
    app: myapp
    release: canary
  ports:
  - name: http
    port: 80
    targetPort: 80
---
apiVersion: apps/v1
kind: Deployment
metadata: 
  name: myapp-deploy
spec:
  replicas: 5
  selector: 
    matchLabels:
      app: myapp
      release: canary
  template:
    metadata:
      labels:
        app: myapp
        release: canary
    spec:
      containers:
      - name: myapp
        image: lijiawang/myapp:v2
        ports:
        - name: httpd
          containerPort: 80
# kubectl  apply -f deploy-demon.yaml 
service/myapp created
deployment.apps/myapp-deploy created
# kubectl get pod 
NAME                           READY   STATUS    RESTARTS   AGE
curl-6bf6db5c4f-dqw9x          1/1     Running   1          16d
myapp-deploy-c69757d67-9bv4w   1/1     Running   0          38s
myapp-deploy-c69757d67-j2kxc   1/1     Running   0          38s
myapp-deploy-c69757d67-jgm5v   1/1     Running   0          38s
myapp-deploy-c69757d67-n5rxw   1/1     Running   0          38s
myapp-deploy-c69757d67-t4nxr   1/1     Running   0          38s
# kubectl get svc
NAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP   17d
myapp        ClusterIP   10.104.246.234   <none>        80/TCP    2m58s

以ingress方式暴露应用

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# cat ingress-myapp.yaml 
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-myapp
  namespace: default
  annotations: 
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: myapp.lijw19.com   # 定义域名
    http:
      paths:
      - path: 
        backend:
          serviceName: myapp   # 跟你要爆了的服务的svc名字相同
          servicePort: 80     # 要暴露的端口
# kubectl apply -f ingress-myapp.yaml 
ingress.extensions/ingress-myapp created
# kubectl get ingresses.
NAME            HOSTS              ADDRESS   PORTS   AGE
ingress-myapp   myapp.lijw19.com             80      10s

本地host解析
windows的hosts文件在c:\windows\system32\drivers\etc下
修改host文件，增加以下内容

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10.122.17.204 myapp.lijw19.com

访问应用

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# for i in `seq 10`; do curl http://myapp.lijw19.com; done
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>

使用浏览器访问http://myapp.lijw19.com


这里我们是使用的http访问的，那如果要使用

使用https访问

创建证书

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# openssl genrsa -out tls.key 2048
Generating RSA private key, 2048 bit long modulus
......................+++
.....................................+++
e is 65537 (0x10001)
# ls -l tls.key 
-rw-r--r-- 1 root root 1675 Sep 16 08:43 tls.key
# openssl req -new -x509 -key tls.key -out tls.crt
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:CN     
State or Province Name (full name) []:lijw19
Locality Name (eg, city) [Default City]:lijw19
Organization Name (eg, company) [Default Company Ltd]:test
Organizational Unit Name (eg, section) []:test
Common Name (eg, your name or your server's hostname) []:test.lijw19.com
Email Address []:
[[email protected] ~]# ls -l tls.*
-rw-r--r-- 1 root root 1318 Sep 16 08:46 tls.crt
-rw-r--r-- 1 root root 1675 Sep 16 08:43 tls.key

证书转成secret

将创建好的证书转成secret

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# kubectl create secret tls lijw-ingress-secret --cert=tls.crt --key=tls.key
secret/lijw-ingress-secret created
# kubectl get secrets 
NAME                  TYPE                                  DATA   AGE
default-token-vmfwt   kubernetes.io/service-account-token   3      17d
lijw-ingress-secret   kubernetes.io/tls                     2      10s

创建https ingress

修改下ingress-myapp-https.yaml加入刚刚添加的secret，修改后的文件如下：

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# cat ingress-myapp-https.yaml 
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-myapp-https
  namespace: default
  annotations: 
    kubernetes.io/ingress.class: "nginx"
spec:
  tls:    # 添加了tls这一段
  - hosts:
    - test.lijw19.com
    secretName: lijw-ingress-secret  # 到这结束
  rules:
  - host: test.lijw19.com
    http:
      paths:
      - path: 
        backend:
          serviceName: myapp
          servicePort: 80
# kubectl apply -f ingress-myapp-https.yaml 
ingress.extensions/ingress-myapp-https created
# kubectl get ingresses ingress-myapp-https 
NAME                  HOSTS             ADDRESS   PORTS     AGE
ingress-myapp-https   test.lijw19.com             80, 443   13s

本地host解析

windows的hosts文件在c:\windows\system32\drivers\etc下
修改host文件，增加以下内容

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10.122.17.204 myapp.lijw19.com  test.lijw19.com

在浏览器访问https://test.lijw19.com

展开全文 >>

harbor搭建

harbor介绍

Harbor是一个用于存储和分发Docker镜像的企业级Registry服务器，通过添加一些企业必需的功能特性，例如安全、标识和管理等，扩展了开源Docker Distribution。作为一个企业级私有Registry服务器，Harbor提供了更好的性能和安全。提升用户使用Registry构建和运行环境传输镜像的效率。Harbor支持安装在多个Registry节点的镜像资源复制，镜像全部保存在私有Registry中， 确保数据和知识产权在公司内部网络中管控。另外，Harbor也提供了高级的安全特性，诸如用户管理，访问控制和活动审计等。

more >>

展开全文 >>

docker网络

docker四种单节点网络

Docker在创建容器时有四种网络模式，bridge为默认不需要用-–net去指定，其他三种模式需要在创建容器时使用–-net去指定。
四种单节点网络模式如下：
none模式，使用–-net=none指定；
host模式，使用–-net=host指定；
bridge模式，使用–-net=bridge指定，默认设置；
container模式，使用–-net=container:容器名称或ID指定。
在Docker安装时会自动在host上创建三个网络,我们可以通过docker network ls查看：

more >>

展开全文 >>

ceph-for-openstack-storage

openstack对接ceph存储

简介

  • 截至2018年5月3日，OpenStack也已经伴随着我们走过了8个年头了，并且成为了云计算领域中最火热的项目之一，逐渐成为IaaS的事实标准，私有云项目的部署首选；
  • OpenStack发展如此的迅速，以至于部署规模愈发的庞大，此时就该思量OpenStack集群的部署支持以及持续可扩展性；
  • OpenStack和Ceph的集成更让开源项目锦上添花，Ceph作为优秀的分布式存储系统，实现对OpenStack相关子项目进行集成或替代，目前在OpenStack中扮演者非常重要的角色；
more >>

展开全文 >>

tag:

    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

不看官网不足以熟练<br>不懂源码不足以精通<br><br>很惭愧<br><br>只做了一点微小的工作<br>谢谢大家