[JENKINS-64599] yamlMergeStrategy merge() doesn't inherit volume mounts from parent pod template

Type: Bug
Resolution: Unresolved
Priority: Minor
Component/s: kubernetes-plugin
Labels:
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Agent declaration with yaml template:

inheritFrom 'k8s-dind'
yamlMergeStrategy merge()
yaml """
  apiVersion: v1
  kind: Pod
  spec:
   containers:
   - name: apaasdevops
     image: <repo_URL>/apaas/apaas-devops:1.20
     workingDir: /home/jenkins
     command: ['cat']
     tty: true
"""

Agent declaration with container template:

inheritFrom 'k8s-dind'
containerTemplate {
   name 'apaasdevops'
   image '<repo_name>/apaas/apaas-devops:1.20'
   workingDir '/home/jenkins'
   ttyEnabled true
   command 'cat'
   args ''
}

Container templates inherit the env and volume mounts from parent pod as shown below

spec:
  containers:
  - command:
    - "cat"
    env:
    - name: "DOCKER_HOST"
      value: "tcp://<IP_ADDRESS>"
    image: "*****/apaas/apaas-devops:1.20"
    imagePullPolicy: "IfNotPresent"
    name: "apaasdevops"
    resources:
      limits: {}
      requests: {}
    securityContext:
      privileged: false
    tty: true
    volumeMounts:
    - mountPath: "/var/lib/docker"
      name: "volume-0"
      readOnly: false
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"

But yaml template is not not inheriting volume mounts and env even though yamlMergeStrategy merge() is used while defining agent

spec:
  containers:
  - command:
    - "cat"
    image: "*****/apaas/apaas-devops:1.20"
    name: "apaasdevops"
    tty: true
    volumeMounts:
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"

kubernetes plugin used is 1.25.4 version

Below volume mount is configured in parent pod 'k8s-dind' which is not getting inherited in yaml template but gets inherited in container template

- mountPath: "/var/lib/docker" 
  name: "volume-0" 
  readOnly: false

Apoorva created issue - 2021-01-13 05:33

Apoorva made changes - 2021-01-13 05:35

Description

Original: Agent declaration with yaml template:
{code:java}
inheritFrom 'k8s-dind'
yamlMergeStrategy merge()
yaml """
  apiVersion: v1
  kind: Pod
  spec:
   containers:
   - name: apaasdevops
     image: <repo_URL>/apaas/apaas-devops:1.20
     workingDir: /home/jenkins
     command: ['cat']
     tty: true
"""
{code}
Agent declaration with container template:
{code:java}
inheritFrom 'k8s-dind'
containerTemplate {
   name 'apaasdevops'
   image '<repo_name>/apaas/apaas-devops:1.20'
   workingDir '/home/jenkins'
   ttyEnabled true
   command 'cat'
   args ''
}
{code}

Container templates inherit the env and volume mounts from parent pod as shown below
{noformat}
spec:
  containers:
  - command:
    - "cat"
    env:
    - name: "DOCKER_HOST"
      value: "tcp://<IP_ADDRESS>"
    image: "*****/apaas/apaas-devops:1.20"
    imagePullPolicy: "IfNotPresent"
    name: "apaasdevops"
    resources:
      limits: {}
      requests: {}
    securityContext:
      privileged: false
    tty: true
    volumeMounts:
    - mountPath: "/var/lib/docker"
      name: "volume-0"
      readOnly: false
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
But yaml template is not not inheriting volume mounts and env even though yamlMergeStrategy merge() is used while defining agent
{noformat}
spec:
  containers:
  - command:
    - "cat"
    image: "*****/apaas/apaas-devops:1.20"
    name: "apaasdevops"
    tty: true
    volumeMounts:
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}

New: Agent declaration with yaml template:
{code:java}
inheritFrom 'k8s-dind'
yamlMergeStrategy merge()
yaml """
  apiVersion: v1
  kind: Pod
  spec:
   containers:
   - name: apaasdevops
     image: <repo_URL>/apaas/apaas-devops:1.20
     workingDir: /home/jenkins
     command: ['cat']
     tty: true
"""
{code}
Agent declaration with container template:
{code:java}
inheritFrom 'k8s-dind'
containerTemplate {
   name 'apaasdevops'
   image '<repo_name>/apaas/apaas-devops:1.20'
   workingDir '/home/jenkins'
   ttyEnabled true
   command 'cat'
   args ''
}
{code}

Container templates inherit the env and volume mounts from parent pod as shown below
{noformat}
spec:
  containers:
  - command:
    - "cat"
    env:
    - name: "DOCKER_HOST"
      value: "tcp://<IP_ADDRESS>"
    image: "*****/apaas/apaas-devops:1.20"
    imagePullPolicy: "IfNotPresent"
    name: "apaasdevops"
    resources:
      limits: {}
      requests: {}
    securityContext:
      privileged: false
    tty: true
    volumeMounts:
    - mountPath: "/var/lib/docker"
      name: "volume-0"
      readOnly: false
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
But yaml template is not not inheriting volume mounts and env even though yamlMergeStrategy merge() is used while defining agent
{noformat}
spec:
  containers:
  - command:
    - "cat"
    image: "*****/apaas/apaas-devops:1.20"
    name: "apaasdevops"
    tty: true
    volumeMounts:
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
kubernetes plugin used is [1.25.4|https://build1-stg.cci.nokia.net/pluginManager/plugin/kubernetes/thirdPartyLicenses] version

Apoorva made changes - 2021-01-13 05:36

Description

Original: Agent declaration with yaml template:
{code:java}
inheritFrom 'k8s-dind'
yamlMergeStrategy merge()
yaml """
  apiVersion: v1
  kind: Pod
  spec:
   containers:
   - name: apaasdevops
     image: <repo_URL>/apaas/apaas-devops:1.20
     workingDir: /home/jenkins
     command: ['cat']
     tty: true
"""
{code}
Agent declaration with container template:
{code:java}
inheritFrom 'k8s-dind'
containerTemplate {
   name 'apaasdevops'
   image '<repo_name>/apaas/apaas-devops:1.20'
   workingDir '/home/jenkins'
   ttyEnabled true
   command 'cat'
   args ''
}
{code}

Container templates inherit the env and volume mounts from parent pod as shown below
{noformat}
spec:
  containers:
  - command:
    - "cat"
    env:
    - name: "DOCKER_HOST"
      value: "tcp://<IP_ADDRESS>"
    image: "*****/apaas/apaas-devops:1.20"
    imagePullPolicy: "IfNotPresent"
    name: "apaasdevops"
    resources:
      limits: {}
      requests: {}
    securityContext:
      privileged: false
    tty: true
    volumeMounts:
    - mountPath: "/var/lib/docker"
      name: "volume-0"
      readOnly: false
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
But yaml template is not not inheriting volume mounts and env even though yamlMergeStrategy merge() is used while defining agent
{noformat}
spec:
  containers:
  - command:
    - "cat"
    image: "*****/apaas/apaas-devops:1.20"
    name: "apaasdevops"
    tty: true
    volumeMounts:
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
kubernetes plugin used is [1.25.4|https://build1-stg.cci.nokia.net/pluginManager/plugin/kubernetes/thirdPartyLicenses] version

New: Agent declaration with yaml template:
{code:java}
inheritFrom 'k8s-dind'
yamlMergeStrategy merge()
yaml """
  apiVersion: v1
  kind: Pod
  spec:
   containers:
   - name: apaasdevops
     image: <repo_URL>/apaas/apaas-devops:1.20
     workingDir: /home/jenkins
     command: ['cat']
     tty: true
"""
{code}
Agent declaration with container template:
{code:java}
inheritFrom 'k8s-dind'
containerTemplate {
   name 'apaasdevops'
   image '<repo_name>/apaas/apaas-devops:1.20'
   workingDir '/home/jenkins'
   ttyEnabled true
   command 'cat'
   args ''
}
{code}

Container templates inherit the env and volume mounts from parent pod as shown below
{noformat}
spec:
  containers:
  - command:
    - "cat"
    env:
    - name: "DOCKER_HOST"
      value: "tcp://<IP_ADDRESS>"
    image: "*****/apaas/apaas-devops:1.20"
    imagePullPolicy: "IfNotPresent"
    name: "apaasdevops"
    resources:
      limits: {}
      requests: {}
    securityContext:
      privileged: false
    tty: true
    volumeMounts:
    - mountPath: "/var/lib/docker"
      name: "volume-0"
      readOnly: false
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
But yaml template is not not inheriting volume mounts and env even though yamlMergeStrategy merge() is used while defining agent
{noformat}
spec:
  containers:
  - command:
    - "cat"
    image: "*****/apaas/apaas-devops:1.20"
    name: "apaasdevops"
    tty: true
    volumeMounts:
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
kubernetes plugin used is 1.25.4 version

Apoorva made changes - 2021-01-13 05:43

Description

Original: Agent declaration with yaml template:
{code:java}
inheritFrom 'k8s-dind'
yamlMergeStrategy merge()
yaml """
  apiVersion: v1
  kind: Pod
  spec:
   containers:
   - name: apaasdevops
     image: <repo_URL>/apaas/apaas-devops:1.20
     workingDir: /home/jenkins
     command: ['cat']
     tty: true
"""
{code}
Agent declaration with container template:
{code:java}
inheritFrom 'k8s-dind'
containerTemplate {
   name 'apaasdevops'
   image '<repo_name>/apaas/apaas-devops:1.20'
   workingDir '/home/jenkins'
   ttyEnabled true
   command 'cat'
   args ''
}
{code}

Container templates inherit the env and volume mounts from parent pod as shown below
{noformat}
spec:
  containers:
  - command:
    - "cat"
    env:
    - name: "DOCKER_HOST"
      value: "tcp://<IP_ADDRESS>"
    image: "*****/apaas/apaas-devops:1.20"
    imagePullPolicy: "IfNotPresent"
    name: "apaasdevops"
    resources:
      limits: {}
      requests: {}
    securityContext:
      privileged: false
    tty: true
    volumeMounts:
    - mountPath: "/var/lib/docker"
      name: "volume-0"
      readOnly: false
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
But yaml template is not not inheriting volume mounts and env even though yamlMergeStrategy merge() is used while defining agent
{noformat}
spec:
  containers:
  - command:
    - "cat"
    image: "*****/apaas/apaas-devops:1.20"
    name: "apaasdevops"
    tty: true
    volumeMounts:
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
kubernetes plugin used is 1.25.4 version

New: Agent declaration with yaml template:
{code:java}
inheritFrom 'k8s-dind'
yamlMergeStrategy merge()
yaml """
  apiVersion: v1
  kind: Pod
  spec:
   containers:
   - name: apaasdevops
     image: <repo_URL>/apaas/apaas-devops:1.20
     workingDir: /home/jenkins
     command: ['cat']
     tty: true
"""
{code}
Agent declaration with container template:
{code:java}
inheritFrom 'k8s-dind'
containerTemplate {
   name 'apaasdevops'
   image '<repo_name>/apaas/apaas-devops:1.20'
   workingDir '/home/jenkins'
   ttyEnabled true
   command 'cat'
   args ''
}
{code}

Container templates inherit the env and volume mounts from parent pod as shown below
{noformat}
spec:
  containers:
  - command:
    - "cat"
    env:
    - name: "DOCKER_HOST"
      value: "tcp://<IP_ADDRESS>"
    image: "*****/apaas/apaas-devops:1.20"
    imagePullPolicy: "IfNotPresent"
    name: "apaasdevops"
    resources:
      limits: {}
      requests: {}
    securityContext:
      privileged: false
    tty: true
    volumeMounts:
    - mountPath: "/var/lib/docker"
      name: "volume-0"
      readOnly: false
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
But yaml template is not not inheriting volume mounts and env even though yamlMergeStrategy merge() is used while defining agent
{noformat}
spec:
  containers:
  - command:
    - "cat"
    image: "*****/apaas/apaas-devops:1.20"
    name: "apaasdevops"
    tty: true
    volumeMounts:
    - mountPath: "/home/jenkins"
      name: "workspace-volume"
      readOnly: false
    workingDir: "/home/jenkins"
  - args:
    - "-disableHttpsCertValidation"
    - "********"{noformat}
kubernetes plugin used is 1.25.4 version

Below volume mount is configured in parent pod 'k8s-dind' {color:#172b4d}which is not getting inherited in yaml template but gets inherited in container template{color}
{code:java}
- mountPath: "/var/lib/docker"
  name: "volume-0"
  readOnly: false
{code}

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