Container creation error (failedMount)

[purin0604]

Hello,
I setup a new kubernetes cluster and testing it Argo WF, but pods fail with the following events.

Events:
  Type     Reason       Age                   From               Message
  ----     ------       ----                  ----               -------
  Normal   Scheduled    10m                   default-scheduler  Successfully assigned argo/dag-priority5rdcx2-374190551 to 10.144.213.45
  Warning  FailedMount  8m32s                 kubelet            Unable to attach or mount volumes: unmounted volumes=[docker-sock], unattached volumes=[my-minio-cred kube-api-access-brtbj podmetadata docker-sock]: timed out waiting for the condition
  Warning  FailedMount  4m2s (x2 over 6m17s)  kubelet            Unable to attach or mount volumes: unmounted volumes=[docker-sock], unattached volumes=[podmetadata docker-sock my-minio-cred kube-api-access-brtbj]: timed out waiting for the condition
  Warning  FailedMount  107s                  kubelet            Unable to attach or mount volumes: unmounted volumes=[docker-sock], unattached volumes=[kube-api-access-brtbj podmetadata docker-sock my-minio-cred]: timed out waiting for the condition
  Warning  FailedMount  19s (x13 over 10m)    kubelet            MountVolume.SetUp failed for volume "docker-sock" : hostPath type check failed: /var/run/docker.sock is not a socket file

When I check the configmap, I found there is "containerRuntimeExecutor: Docker" which is unfamiliar to me.
Does this relate to the above error?

Name:         workflow-controller-configmap
Namespace:    argo
Labels:       <none>
Annotations:  <none>

Data
====
artifactRepository:
----
archiveLogs: true
s3:
  bucket: my-bucket
  endpoint: minio:9000
  insecure: true
  accessKeySecret:
    name: my-minio-cred
    key: accesskey
  secretKeySecret:
    name: my-minio-cred
    key: secretkey

containerRuntimeExecutor:
----
docker
containerRuntimeExecutors:
----
- name: k8sapi
  selector:
    matchLabels:
      workflows.argoproj.io/container-runtime-executor: k8sapi

executor:
----
resources:
  requests:
    cpu: 10m
    memory: 64Mi

I would appreciate any comments! Thank you.

[terrytangyuan]

Docker executor is deprecated. Please try out other executors such as emissary: https://argoproj.github.io/argo-workflows/workflow-executors/

[purin0604]

There is another lines showing executor as k8sapi.
What’s the difference between “containerRuntimeExecutors” and containerRuntimeExecutor”? (with and without “s” at the end)

containerRuntimeExecutors:
----
- name: k8sapi
  selector:
    matchLabels:
      workflows.argoproj.io/container-runtime-executor: k8sapi

[terrytangyuan]

See comments in https://github.com/argoproj/argo-workflows/blob/master/docs/workflow-controller-configmap.yaml