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Add kubenetes lifecycle

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junv
2020-01-28 11:10:44 +11:00
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categories/devops/kubernetes.md
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@@ -157,6 +157,24 @@ For storing keys, credentials and certificates. For instance: database token, 3r
Links:
* [Kubernetes NodePort vs LoadBalancer vs Ingress? When should I use what?](https://medium.com/google-cloud/kubernetes-nodeport-vs-loadbalancer-vs-ingress-when-should-i-use-what-922f010849e0)
## Kubernetes pod lifecycle
Through its lifecycle, a Pod can attain following states:
- `Pending`: The pod is accepted by the Kubernetes system but its container(s) is/are not created yet.
- `Initialising`: The docker images of the pods are been pulling and initialising
- `ContainerCreating`: The Pod is been creating
- `Running`: The pod is scheduled on a node and all its containers are created and at-least one container is in Running state.
- `Succeeded`: All container(s) in the Pod have exited with status 0 and will not be restarted.
- `Failed`: All container(s) of the Pod have exited and at least one container has returned a non-zero status.
- `CrashLoopBackoff`: The container fails to start and is tried again and again.
## Zero down time deployment
Set strategy type to `RollingUpdate` instead of `Recreate`