【发布时间】：2020-09-10 08:00:31
【问题描述】：
目前我正在尝试使用 Kubernetes 和 Kubeadm 为我的 MYSQL 数据库实现卷持久性。 该环境基于使用 EBS 存储磁盘的亚马逊 EC2 实例。
正如您在下面的存储类中看到的那样，为了实现 mysql 持久性，已经实现了持久卷以及持久卷声明。 但是，当我尝试部署 mysql pod（在附加图像上）时发生错误。
mysql-pv.yml：
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
name: standard
provisioner: kubernetes.io/aws-ebs
parameters:
type: gp2
reclaimPolicy: Retain
mountOptions:
- debug
volumeBindingMode: Immediate
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: mysql-pv
labels:
type: amazonEBS
spec:
capacity:
storage: 5Gi
storageClassName: standard
accessModes:
- ReadWriteOnce
awsElasticBlockStore:
volumeID: vol-ID
fsType: ext4
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mysql-pv-claim
spec:
storageClassName: standard
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 5Gi
mysql.yml：
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql
spec:
selector:
matchLabels:
app: mysql
strategy:
type: Recreate
template:
metadata:
labels:
app: mysql
spec:
containers:
- image: mysql:5.7.30
name: mysql
env:
- name: MYSQL_ROOT_PASSWORD
value: MYPASSWORD
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql-persistent-storage
mountPath: /var/lib/mysql
volumes:
- name: mysql-persistent-storage
persistentVolumeClaim:
claimName: mysql-pv-claim
---
apiVersion: v1
kind: Service
metadata:
name: mysql
spec:
type: NodePort
ports:
- port: 3306
targetPort: 3306
nodePort: 31306
selector:
app: mysql
这是我的 mysql pod 描述：
Name: mysql-5c9788fc65-jq2nh
Namespace: default
Priority: 0
Node: ip-172-31-31-210/172.31.31.210
Start Time: Sat, 23 May 2020 12:19:24 +0000
Labels: app=mysql
pod-template-hash=5c9788fc65
Annotations: <none>
Status: Pending
IP:
IPs: <none>
Controlled By: ReplicaSet/mysql-5c9788fc65
Containers:
mysql:
Container ID:
Image: mysql:5.7.30
Image ID:
Port: 3306/TCP
Host Port: 0/TCP
State: Waiting
Reason: ContainerCreating
Ready: False
Restart Count: 0
Environment:
MYSQL_ROOT_PASSWORD: MYPASS
Mounts:
/data/ from mysql-persistent-storage (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-cshk2 (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-cshk2:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-cshk2
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
这是我得到的错误：
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled <unknown> default-scheduler
Successfully assigned default/mysql-5c9788fc65-jq2nh to ip-172-31-31-210
Warning FailedMount 39m kubelet, ip-172-31-31-210 MountVolume.SetUp failed for volume "mysql-pv" : mount failed: exit status 32
Mounting command: systemd-run
Mounting arguments: --description=Kubernetes transient mount for /var/lib/kubelet/pods/29d5cee7-da11-4a0c-b5aa-e262f919d1ba/volumes/kubernetes.io~aws-ebs/mysql-pv --scope -- mount -o bind /var/lib/kubelet/plugins/kubernetes.io/aws-ebs/mounts/vol-06212746d87534157 /var/lib/kubelet/pods/29d5cee7-da11-4a0c-b5aa-e262f919d1ba/volumes/kubernetes.io~aws-ebs/mysql-pv
Output: Running scope as unit: run-r11fefbbda1d241c2985931d3adaaa969.scope
mount: /var/lib/kubelet/pods/29d5cee7-da11-4a0c-b5aa-e262f919d1ba/volumes/kubernetes.io~aws-ebs/mysql-pv: special device /var/lib/kubelet/plugins/kubernetes.io/aws-ebs/mounts/vol-06212746d87534157 does not exist.
Warning FailedMount 39m kubelet, ip-172-31-31-210 MountVolume.SetUp failed for volume "mysql-pv" : mount failed: exit status 32
有人可以帮助我吗？
【问题讨论】：
-
您能否在此处查看有关在 EBS github.com/kubernetes/kubernetes/issues/86064 的情况下如何安装的步骤。还需要您提供有关
kubectl describe pvc mysql-pv-claim和kubectl describe pv mysql-pv的更多信息。您需要检查它们是否创建成功。也请进入节点内部并运行lsblk以检查挂载阶段的情况。 -
如果你可以分享 kubelet
/var/log/kubelet log和/var/log/kube-controller-manager.log的日志 -
在mount键中，表示特殊设备不存在。这意味着 pvc 不受 pv 的限制。因此它失败了。
标签： mysql amazon-ec2 kubernetes amazon-ebs persistent-volumes