Difference between revisions of "Kind: Pod"

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(Changed redirect target from Kind to Kind (Kubernetes))
Tag: Redirect target changed
 
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#redirect [[Kind (Kubernetes)]]
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{{lowercase}}
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 +
[[spec.]]
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[[spec.containers]]
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[[spec.volumes]]
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[[spec.initContainers]]
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[[spec.securityContext]]
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[[spec.nodeSelector]]
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[[spec.imagePullSecrets]]
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=== [[Nginx example]] ===
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{{kind pod nginx}}
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 +
 
 +
Alpine container to access a PV:
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{{alpine cp example}}
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 +
 
 +
https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
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 +
{{kind pod resources}}
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== [[initContainers]] ==
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https://kubernetes.io/docs/concepts/workloads/pods/init-containers/#init-containers-in-use
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apiVersion: v1
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kind: Pod
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metadata:
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  name: myapp-pod
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  labels:
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    app: myapp
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spec:
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  containers:
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  - name: myapp-container
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    image: busybox:1.28
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    command: ['sh', '-c', 'echo The app is running! && sleep 3600']
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  [[initContainers]]:
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  - name: init-myservice
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    image: busybox:1.28
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    command: ['sh', '-c', "until nslookup myservice.$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace).svc.cluster.local; do echo  waiting for myservice; sleep 2; done"]
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  - name: init-mydb
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    image: busybox:1.28
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    command: ['sh', '-c', "until nslookup mydb.$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace).svc.cluster.local; do echo waiting for mydb; sleep 2; done"]
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 +
 
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== [[securityContext]] ==
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{{kind_pod_securitycontext}}
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== [[imagePullSecrets]] ==
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{{imagepullsecrets ex}}
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== [[Sidecar]] container ==
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{{sidecar-container}}
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== Related ==
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* <code>[[dnsPolicy:]]</code>
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* [[Kubernetes init containers]]
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* <code>[[autoScaler:]]</code>
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* <code>[[envFrom:]]</code>
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* <code>[[LivenessProbe]]</code>
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* <code>[[lifecycle:]]</code>
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* <code>[[ports:]]</code>
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* [[Kubernetes, env:]]
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* <code>[[nodeName]]</code>
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* <code>[[NodeSelector]]</code>
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* <code>[[kind: ReplicaSet]]</code>
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* <code>[[kubectl run]]</code>
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* [[Configure a Security Context for a Pod or Container]]
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* [[Resource Management for Pods and Containers]]
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* [[imagePullSecrets]]
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* Kubernetes changelog: [[AppArmor]] profiles can now be configured through fields on the [[PodSecurityContext]] and container [[SecurityContext]]
 +
 
 +
== See also ==
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* {{kind: Pod}}
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* {{Pods}}
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 +
[[Category:K8s]]

Latest revision as of 18:42, 27 October 2024

spec.
spec.containers
spec.volumes
spec.initContainers
spec.securityContext
spec.nodeSelector
spec.imagePullSecrets

Nginx example[edit]

 apiVersion: v1
kind: Pod
metadata:
  name: nginx
  labels:
    env: test
spec:
  containers:
  - name: nginx
    image: nginx
    imagePullPolicy: IfNotPresent
  nodeSelector:
    disktype: ssd


Alpine container to access a PV:

 apiVersion: v1
kind: Pod
metadata:
  name: myalpinewithvolume
spec:
  containers:
  - name: alpine
    image: alpine:latest
    command: ['ash']
    tty: true
    stdin: true
    volumeMounts:
    - name: myvolume
      mountPath: /myvolume
  volumes:
  - name: myvolume
    persistentVolumeClaim:
      claimName: myPVCtoMount


https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/

---
apiVersion: v1
kind: Pod
metadata:
  name: frontend
spec:
  containers:
  - name: app
    image: images.my-company.example/app:v4
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "128Mi"
        cpu: "500m"
  - name: log-aggregator
    image: images.my-company.example/log-aggregator:v6
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "128Mi"
        cpu: "500m"

initContainers[edit]

https://kubernetes.io/docs/concepts/workloads/pods/init-containers/#init-containers-in-use

apiVersion: v1
kind: Pod
metadata:
 name: myapp-pod
 labels:
   app: myapp
spec:
 containers:
 - name: myapp-container
   image: busybox:1.28
   command: ['sh', '-c', 'echo The app is running! && sleep 3600']
 initContainers:
 - name: init-myservice
   image: busybox:1.28
   command: ['sh', '-c', "until nslookup myservice.$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace).svc.cluster.local; do echo  waiting for myservice; sleep 2; done"]
 - name: init-mydb
   image: busybox:1.28
   command: ['sh', '-c', "until nslookup mydb.$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace).svc.cluster.local; do echo waiting for mydb; sleep 2; done"]


securityContext[edit]

apiVersion: v1
kind: Pod
metadata:
  name: security-context-demo
spec:
  securityContext:
    runAsUser: 1000
    runAsGroup: 3000
    fsGroup: 2000
  volumes:
  - name: sec-ctx-vol
    emptyDir: {}
  containers:
  - name: sec-ctx-demo
    image: busybox:1.28
    command: [ "sh", "-c", "sleep 1h" ]
    volumeMounts:
    - name: sec-ctx-vol
      mountPath: /data/demo
    securityContext:
      allowPrivilegeEscalation: false

imagePullSecrets[edit]

 apiVersion: v1
kind: Pod
metadata:
  name: private-reg
spec:
  containers:
  - name: private-reg-container
    image: <your-private-image>
  imagePullSecrets:
  - name: regcred

Sidecar container[edit]

 apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
  - name: main-container
    image: busybox
    command: ["sh", "-c", "echo 'Main process running'; sleep 30"]
  - name: sidecar-container
    image: busybox
    command: ["sh", "-c", "while true; do sleep 3600; done"]

Related[edit]

See also[edit]

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