我正在尝试使用NFS作为持久卷在kubernetes上安装wordpress。 到目前为止，我已经按照以下链接进行了操作。
我能够成功安装mysql，并且mysql Pod显示以下消息。
MySQL init process done. Ready for start up.
2019-03-11 12:23:54 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-03-11 12:23:54 0 [Note] mysqld (mysqld 5.6.43) starting as process 1 ...
2019-03-11 12:23:54 1 [Note] Plugin 'FEDERATED' is disabled.
2019-03-11 12:23:54 1 [Note] InnoDB: Using atomics to ref count buffer pool pages
2019-03-11 12:23:54 1 [Note] InnoDB: The InnoDB memory heap is disabled
2019-03-11 12:23:54 1 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2019-03-11 12:23:54 1 [Note] InnoDB: Memory barrier is not used
2019-03-11 12:23:54 1 [Note] InnoDB: Compressed tables use zlib 1.2.11
2019-03-11 12:23:54 1 [Note] InnoDB: Using Linux native AIO
2019-03-11 12:23:54 1 [Note] InnoDB: Using CPU crc32 instructions
2019-03-11 12:23:54 1 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2019-03-11 12:23:54 1 [Note] InnoDB: Completed initialization of buffer pool
2019-03-11 12:23:54 1 [Note] InnoDB: Highest supported file format is Barracuda.
2019-03-11 12:23:54 1 [Note] InnoDB: 128 rollback segment(s) are active.
2019-03-11 12:23:54 1 [Note] InnoDB: Waiting for purge to start
2019-03-11 12:23:54 1 [Note] InnoDB: 5.6.43 started; log sequence number 1625997
2019-03-11 12:23:54 1 [Note] Server hostname (bind-address): '*'; port: 3306
2019-03-11 12:23:54 1 [Note] IPv6 is available.
2019-03-11 12:23:54 1 [Note] - '::' resolves to '::';
2019-03-11 12:23:54 1 [Note] Server socket created on IP: '::'.
2019-03-11 12:23:54 1 [Warning] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
2019-03-11 12:23:54 1 [Warning] 'proxies_priv' entry '@ root@mysql-65db44d76-ss9g7' ignored in --skip-name-resolve mode.
2019-03-11 12:23:54 1 [Note] Event Scheduler: Loaded 0 events
2019-03-11 12:23:54 1 [Note] mysqld: ready for connections.
Version: '5.6.43' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server (GPL)
现在，当我创建Wordpress部署时，它会显示以下错误
kubi@kubem:~/wordpress2$ kubectl logs -f wordpress-67bbb57489-glm5r
Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in Standard input code on line 22
Warning: mysqli::__construct(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in Standard input code on line 22
MySQL Connection Error: (2002) php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution
以下是Wordpress POD和Mysql POD的描述：
Wordpress-
kubi@kubem:~/wordpress2$ kubectl describe pod wordpress-67bbb57489-glm5r
Name: wordpress-67bbb57489-glm5r
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: kubew1/192.168.56.111
Start Time: Mon, 11 Mar 2019 13:26:56 +0100
Labels: app=wordpress
pod-template-hash=67bbb57489
tier=frontend
Annotations: <none>
Status: Running
IP: 10.244.1.48
Controlled By: ReplicaSet/wordpress-67bbb57489
Containers:
wordpress:
Container ID: docker://06e30ceddb0ebfdb9c71b597d538d2e58bc306d63837fa2d48447ec547ff23b5
Image: wordpress:latest
Image ID: docker-pullable://wordpress@sha256:08c71170cdd4427d155906f8eb0e715768c133f836780c97b0e3cc3e7c1288e2
Port: 80/TCP
Host Port: 0/TCP
State: Running
Started: Mon, 11 Mar 2019 13:34:56 +0100
Last State: Terminated
Reason: Error
Exit Code: 1
Started: Mon, 11 Mar 2019 13:30:52 +0100
Finished: Mon, 11 Mar 2019 13:34:39 +0100
Ready: True
Restart Count: 2
Environment:
WORDPRESS_DB_HOST: mysql
WORDPRESS_DB_PASSWORD: <set to the key 'password.txt' in secret 'mysql-pass'> Optional: false
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-fl5nc (ro)
/var/www/html from wordpress-local-storage (rw)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
wordpress-local-storage:
Type: EmptyDir (a temporary directory that shares a pod's lifetime)
Medium:
default-token-fl5nc:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-fl5nc
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 11m default-scheduler Successfully assigned default/wordpress-67bbb57489-glm5r to kubew1
Warning BackOff 4m kubelet, kubew1 Back-off restarting failed container
Normal Pulling 3m48s (x3 over 11m) kubelet, kubew1 pulling image "wordpress:latest"
Normal Pulled 3m45s (x3 over 11m) kubelet, kubew1 Successfully pulled image "wordpress:latest"
Normal Created 3m44s (x3 over 11m) kubelet, kubew1 Created container
Normal Started 3m44s (x3 over 11m) kubelet, kubew1 Started container
MySQL-
Name: mysql-65db44d76-ss9g7
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: kubew2/192.168.56.112
Start Time: Mon, 11 Mar 2019 13:23:46 +0100
Labels: app=wordpress
pod-template-hash=65db44d76
tier=mysql
Annotations: <none>
Status: Running
IP: 10.244.2.41
Controlled By: ReplicaSet/mysql-65db44d76
Containers:
mysql:
Container ID: docker://4758a3a3fe6dbce6cfa185949c7b987019a2003d7f09924c182b36574290d9c7
Image: mysql:5.6
Image ID: docker-pullable://mysql@sha256:36cad5daaae69fbcc15dd33b9f25f35c41bbe7e06cb7df5e14d8b966fb26c1b4
Port: 3306/TCP
Host Port: 0/TCP
State: Running
Started: Mon, 11 Mar 2019 13:23:47 +0100
Ready: True
Restart Count: 0
Environment:
MYSQL_ROOT_PASSWORD: <set to the key 'password.txt' in secret 'mysql-pass'> Optional: false
Mounts:
/var/lib/mysql from mysql-local-storage (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-fl5nc (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
mysql-local-storage:
Type: EmptyDir (a temporary directory that shares a pod's lifetime)
Medium:
default-token-fl5nc:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-fl5nc
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 16m default-scheduler Successfully assigned default/mysql-65db44d76-ss9g7 to kubew2
Normal Pulled 16m kubelet, kubew2 Container image "mysql:5.6" already present on machine
Normal Created 16m kubelet, kubew2 Created container
Normal Started 16m kubelet, kubew2 Started container
以下是PV和PVC的状态-表明只有mysql绑定了，而wordpress没有绑定。
kubi@kubem:~/wordpress2$ kubectl get pvc,pv
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
persistentvolumeclaim/mysql-lv-claim Bound local-volume-1 8Gi RWO 27m
persistentvolumeclaim/wp-lv-claim Pending 24m
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/local-volume-1 8Gi RWO Retain Bound default/mysql-lv-claim 27m
persistentvolume/local-volume-2 8Gi RWO Retain Released default/wp-lv-claim 27m
请提出如何进一步调查该问题的建议，以便使wordpress在群集中运行。
集群规范： Ubuntu VM上有1个Master + 2个Slaves
谢谢