Difference between revisions of "StatefulSets"

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[[StatefulSet]]
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* https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/
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* <code>[[kubectl get statefulsets]]</code>
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* <code>[[kubectl describe statefulsets]]</code>
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 +
kubectl get statefulsets -n your_namespace
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NAME                  READY  AGE
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your-elasticsearch-master  0/2    2y88d
  
* https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/
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33m        Warning  [[CalculateExpectedPodCountFailed]]  poddisruptionbudget/xxxx-[[pdb]]                    Failed to calculate the number of  expected pods: statefulsets.apps does not implement the scale subresource
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 +
 
 +
== Official example ==
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apiVersion: v1
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[[kind: Service]]
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metadata:
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  name: nginx
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  labels:
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    app: nginx
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spec:
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  ports:
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  - port: 80
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    name: web
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  clusterIP: None
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  selector:
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    app: nginx
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---
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apiVersion: apps/v1
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[[kind: StatefulSet]]
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metadata:
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  name: web
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spec:
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  selector:
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    matchLabels:
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      app: nginx # has to match .spec.template.metadata.labels
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  serviceName: "nginx"
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  replicas: 3 # by default is 1
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  minReadySeconds: 10 # by default is 0
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  template:
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    metadata:
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      labels:
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        app: nginx # has to match .spec.selector.matchLabels
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    spec:
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      [[terminationGracePeriodSeconds]]: 10
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      containers:
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      - name: nginx
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        image: k8s.gcr.io/nginx-slim:0.8
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        ports:
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        - containerPort: 80
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          name: web
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        [[volumeMounts:]]
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        - name: www
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          [[mountPath:]] /usr/share/nginx/html
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  [[volumeClaimTemplates:]]
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  - metadata:
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      name: www
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    spec:
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      accessModes: [ "ReadWriteOnce" ]
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      storageClassName: "my-storage-class"
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      resources:
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        requests:
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          storage: 1Gi
  
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== Related ==
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* [[Peloton]]
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* <code>[[kubectl rollout]]</code>
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* [[Elastic Cloud on Kubernetes (ECK)]] (May 2019)
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* [[Kubernetes storage]]
  
 
== See also ==
 
== See also ==
* {{K8s}}
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* {{StatefulSets}}
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* {{Kubernetes workloads}}
  
 
[[Category:K8s]]
 
[[Category:K8s]]

Latest revision as of 08:05, 24 July 2024

StatefulSet

kubectl get statefulsets -n your_namespace
NAME                   READY   AGE
your-elasticsearch-master   0/2     2y88d
33m         Warning   CalculateExpectedPodCountFailed   poddisruptionbudget/xxxx-pdb                     Failed to calculate the number of  expected pods: statefulsets.apps does not implement the scale subresource


Official example[edit]

apiVersion: v1
kind: Service
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  ports:
  - port: 80
    name: web
  clusterIP: None
  selector:
    app: nginx
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
spec:
  selector:
    matchLabels:
      app: nginx # has to match .spec.template.metadata.labels
  serviceName: "nginx"
  replicas: 3 # by default is 1
  minReadySeconds: 10 # by default is 0
  template:
    metadata:
      labels:
        app: nginx # has to match .spec.selector.matchLabels
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: nginx
        image: k8s.gcr.io/nginx-slim:0.8
        ports:
        - containerPort: 80
          name: web
        volumeMounts:
        - name: www
          mountPath: /usr/share/nginx/html
  volumeClaimTemplates:
  - metadata:
      name: www
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: "my-storage-class"
      resources:
        requests:
          storage: 1Gi

Related[edit]

See also[edit]

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