Я следую официальному руководству здесь для запуска модуля mysql с состоянием в кластере Kubernetes, который уже работает на GCP.Я использовал те же самые команды, чтобы сначала создать постоянный том и постоянную цепочку томов, а затем развернул содержимое файла mysql yaml согласно документации.Модуль mysql не запущен и находится в состоянии RunContainerError.Проверка журналов этого модуля mysql показывает:
failed to open log file "/var/log/pods/045cea87-6408-11e9-84d3-42010aa001c3/mysql/2.log": open /var/log/pods/045cea87-6408-11e9-84d3-42010aa001c3/mysql/2.log: no such file or directory
Обновление: По просьбе @Matthew в комментариях, результат kubectl describe pods -l app=mysql предоставляется здесь:
Name: mysql-fb75876c6-tk6ml
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: gke-mycluster-default-pool-b1c1d316-xv4v/10.160.0.13
Start Time: Tue, 23 Apr 2019 13:36:04 +0530
Labels: app=mysql
pod-template-hash=963143272
Annotations: kubernetes.io/limit-ranger=LimitRanger plugin set: cpu request for container mysql
Status: Running
IP: 10.52.0.7
Controlled By: ReplicaSet/mysql-fb75876c6
Containers:
mysql:
Container ID: docker://451ec5bf67f60269493b894004120b627d9a05f38e37cb50e9f283e58dbe6e56
Image: mysql:5.6
Image ID: docker-pullable://mysql@sha256:5ab881bc5abe2ac734d9fb53d76d984cc04031159152ab42edcabbd377cc0859
Port: 3306/TCP
Host Port: 0/TCP
State: Waiting
Reason: RunContainerError
Last State: Terminated
Reason: ContainerCannotRun
Message: error while creating mount source path '/mnt/data': mkdir /mnt/data: read-only file system
Exit Code: 128
Started: Tue, 23 Apr 2019 13:36:18 +0530
Finished: Tue, 23 Apr 2019 13:36:18 +0530
Ready: False
Restart Count: 1
Requests:
cpu: 100m
Environment:
MYSQL_ROOT_PASSWORD: password
Mounts:
/var/lib/mysql from mysql-persistent-storage (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-jpkzg (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
mysql-persistent-storage:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: mysql-pv-claim
ReadOnly: false
default-token-jpkzg:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-jpkzg
Optional: false
QoS Class: Burstable
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 32s default-scheduler Successfully assigned default/mysql-fb75876c6-tk6ml to gke-mycluster-default-pool-b1c1d316-xv4v
Normal Pulling 31s kubelet, gke-mycluster-default-pool-b1c1d316-xv4v pulling image "mysql:5.6"
Normal Pulled 22s kubelet, gke-mycluster-default-pool-b1c1d316-xv4v Successfully pulled image "mysql:5.6"
Normal Pulled 4s (x2 over 18s) kubelet, gke-mycluster-default-pool-b1c1d316-xv4v Container image "mysql:5.6" already present on machine
Normal Created 3s (x3 over 18s) kubelet, gke-mycluster-default-pool-b1c1d316-xv4v Created container
Warning Failed 3s (x3 over 18s) kubelet, gke-mycluster-default-pool-b1c1d316-xv4v Error: failed to start container "mysql": Error response from daemon: error while creating mount source path '/mnt/data': mkdir /mnt/data: read-only file system
По запросу @Hanx: Результат kubectl describe pv mysql-pv-volume
Name: mysql-pv-volume
Labels: type=local
Annotations: kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"v1","kind":"PersistentVolume","metadata":{"annotations":{},"labels":{"type":"local"},"name":"mysql-pv-volume","namespace":""},"spec":{"a...
pv.kubernetes.io/bound-by-controller=yes
Finalizers: [kubernetes.io/pv-protection]
StorageClass: manual
Status: Bound
Claim: default/mysql-pv-claim
Reclaim Policy: Retain
Access Modes: RWO
Capacity: 1Gi
Node Affinity: <none>
Message:
Source:
Type: HostPath (bare host directory volume)
Path: /mnt/data
HostPathType:
Events: <none>
Результат kubectl describe pvc mysql-pv-claim
Name: mysql-pv-claim
Namespace: default
StorageClass: manual
Status: Bound
Volume: mysql-pv-volume
Labels: <none>
Annotations: kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"v1","kind":"PersistentVolumeClaim","metadata":{"annotations":{},"name":"mysql-pv-claim","namespace":"default"},"spec":{"accessModes":["R...
pv.kubernetes.io/bind-completed=yes
pv.kubernetes.io/bound-by-controller=yes
Finalizers: [kubernetes.io/pvc-protection]
Capacity: 1Gi
Access Modes: RWO
Events: <none>
mysql-pv.yaml
kind: PersistentVolume
apiVersion: v1
metadata:
name: mysql-pv-volume
labels:
type: local
spec:
storageClassName: manual
capacity:
storage: 20Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/data"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mysql-pv-claim
spec:
storageClassName: manual
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 20Gi
mysql.yaml
apiVersion: v1
kind: Service
metadata:
name: mysql
spec:
ports:
- port: 3306
selector:
app: mysql
clusterIP: None
---
apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
name: mysql
spec:
selector:
matchLabels:
app: mysql
strategy:
type: Recreate
template:
metadata:
labels:
app: mysql
spec:
containers:
- image: mysql:5.6
name: mysql
env:
# Use secret in real usage
- name: MYSQL_ROOT_PASSWORD
value: password
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql-persistent-storage
mountPath: /var/lib/mysql
volumes:
- name: mysql-persistent-storage
persistentVolumeClaim:
claimName: mysql-pv-claim