Failed to install mysql-operator in Kubernetes

Question

So, I followed the guide (https://dev.mysql.com/doc/mysql-operator/en/mysql-operator-installation-kubectl.html) to install MySql cluster on Kubernetes Ubuntu Server 22.04 cluster.

I have successfully run the following command to import the required yaml deployment files

kubectl apply -f https://raw.githubusercontent.com/mysql/mysql-operator/trunk/deploy/deploy-crds.yaml
kubectl apply -f https://raw.githubusercontent.com/mysql/mysql-operator/trunk/deploy/deploy-operator.yaml

Now when I run the deploy command, the pod keeps restarting.

kubectl get deployment mysql-operator --namespace mysql-operator

This is the output of the log (I got the error)

kubectl logs mysql-operator-755b988dd9-jn7f6 --namespace=mysql-operator
exec /usr/bin/mysqlsh: exec format error

This is the description:

kubectl describe pod mysql-operator-755b988dd9-jn7f6 --namespace=mysql-operator
Name:             mysql-operator-755b988dd9-jn7f6
Namespace:        mysql-operator
Priority:         0
Service Account:  mysql-operator-sa
Node:             mnetk8s-node-a1/10.30.0.11
Start Time:       Wed, 07 Jun 2023 22:52:40 +0100
Labels:           name=mysql-operator
                  pod-template-hash=755b988dd9
Annotations:      <none>
Status:           Running
IP:               10.244.3.6
IPs:
  IP:           10.244.3.6
Controlled By:  ReplicaSet/mysql-operator-755b988dd9
Containers:
  mysql-operator:
    Container ID:  docker://785da7db660ae71ad09e1d6ecf7672f68fbbfbf1e03b64b4619bde188c7a250f
    Image:         container-registry.oracle.com/mysql/community-operator:8.0.33-2.0.10
    Image ID:      docker-pullable://container-registry.oracle.com/mysql/community-operator@sha256:9c411c679b416b7d4bce4e14f65b311105429d25c3183f864fdd9baec8d5647f
    Port:          <none>
    Host Port:     <none>
    Args:
      mysqlsh
      --log-level=@INFO
      --pym
      mysqloperator
      operator
    State:          Waiting
      Reason:       CrashLoopBackOff
    Last State:     Terminated
      Reason:       Error
      Exit Code:    1
      Started:      Wed, 07 Jun 2023 23:34:29 +0100
      Finished:     Wed, 07 Jun 2023 23:34:29 +0100
    Ready:          False
    Restart Count:  13
    Readiness:      exec [cat /tmp/mysql-operator-ready] delay=1s timeout=1s period=3s #success=1 #failure=3
    Environment:
      MYSQLSH_USER_CONFIG_HOME:                 /mysqlsh
      MYSQLSH_CREDENTIAL_STORE_SAVE_PASSWORDS:  never
    Mounts:
      /mysqlsh from mysqlsh-home (rw)
      /tmp from tmpdir (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-jdn2d (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             False
  ContainersReady   False
  PodScheduled      True
Volumes:
  mysqlsh-home:
    Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
    Medium:
    SizeLimit:  <unset>
  tmpdir:
    Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
    Medium:
    SizeLimit:  <unset>
  kube-api-access-jdn2d:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   BestEffort
Node-Selectors:              <none>
Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type     Reason     Age                  From               Message
  ----     ------     ----                 ----               -------
  Normal   Scheduled  46m                  default-scheduler  Successfully assigned mysql-operator/mysql-operator-755b988dd9-jn7f6 to mnetk8s-node-a1
  Normal   Pulled     45m (x5 over 46m)    kubelet            Container image "container-registry.oracle.com/mysql/community-operator:8.0.33-2.0.10" already present on machine
  Normal   Created    45m (x5 over 46m)    kubelet            Created container mysql-operator
  Normal   Started    45m (x5 over 46m)    kubelet            Started container mysql-operator
  Warning  BackOff    97s (x221 over 46m)  kubelet            Back-off restarting failed container mysql-operator in pod mysql-operator-755b988dd9-jn7f6_mysql-operator(9e7f8c17-4fdd-4f98-a074-d2112019b28e)

Any help or ideas would be great!

Answer 1

You can take a look at this.

An open source tool called kubeblocks for deploying and managing MySQL on Kubernetes.

I think it can solve your problem.

Answer 2

exec format error Usually means that the image you are using is not suitable for the architecture you are deploying to. That is, you use an ARM image on an AMD64 node and vice versa.

Since all MySQL images on Oracle Container Registry are AMD64 images, I would guess that your cluster is running on ARM architecture, such as Ampere instances.

You will need to run on an x64 arch instance, or find an image for ARM, or go to source and rebuild the image for ARM.