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Update static-pod.md 

- Fixed brain flatuence around which runtime I was testing
- Outputs changed
- Noted added about crictl ps's default behavior of outputting sha256sum in image name
- Image name in outputs have been shortened per Slack convo https://kubernetes.slack.com/archives/C02PZMA3R6E/p1643026840047600
pull/31410/head
Chris Short 2022-01-24 14:40:52 -05:00
parent d158cdf028
commit a819c51c22
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content/en/docs/tasks/configure-pod-container/static-pod.md
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@ -42,7 +42,7 @@ The `spec` of a static Pod cannot refer to other API objects
{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}} {{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
This page assumes you're using {{< glossary_tooltip term_id="containerd" >}} to run Pods, This page assumes you're using {{< glossary_tooltip term_id="cri-o" >}} to run Pods,
and that your nodes are running the Fedora operating system. and that your nodes are running the Fedora operating system.
Instructions for other distributions or Kubernetes installations may vary. Instructions for other distributions or Kubernetes installations may vary.
@ -162,18 +162,20 @@ crictl ps
The output might be something like: The output might be something like:
``` ```
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID
f6d05272b57e nginx:latest "nginx" 8 minutes ago Up 8 minutes k8s_web.6f802af4_static-web-fk-node1_default_67e24ed9466ba55986d120c867395f3c_378e5f3c 129fd7d382018 docker.io/library/nginx@sha256:... 11 minutes ago Running web 0 34533c6729106
``` ```
Note: `crictl` outputs the image URI and SHA-256 checksum. `NAME` will look more like: `docker.io/library/nginx@sha256:0d17b565c37bcbd895e9d92315a05c1c3c9a29f762b011a10c54a66cd53c9b31`.
You can see the mirror Pod on the API server: You can see the mirror Pod on the API server:
```shell ```shell
kubectl get pods kubectl get pods
``` ```
``` ```
NAME READY STATUS RESTARTS AGE NAME READY STATUS RESTARTS AGE
static-web-my-node1 1/1 Running 0 2m static-web 1/1 Running 0 2m
``` ```
{{< note >}} {{< note >}}
@ -190,18 +192,18 @@ If you try to use `kubectl` to delete the mirror Pod from the API server,
the kubelet _doesn't_ remove the static Pod: the kubelet _doesn't_ remove the static Pod:
```shell ```shell
kubectl delete pod static-web-my-node1 kubectl delete pod static-web
``` ```
``` ```
pod "static-web-my-node1" deleted pod "static-web" deleted
``` ```
You can see that the Pod is still running: You can see that the Pod is still running:
```shell ```shell
kubectl get pods kubectl get pods
``` ```
``` ```
NAME READY STATUS RESTARTS AGE NAME READY STATUS RESTARTS AGE
static-web-my-node1 1/1 Running 0 12s static-web 1/1 Running 0 4s
``` ```
Back on your node where the kubelet is running, you can try to stop the container manually. Back on your node where the kubelet is running, you can try to stop the container manually.
@ -210,13 +212,13 @@ automatically:
```shell ```shell
# Run these commands on the node where the kubelet is running # Run these commands on the node where the kubelet is running
crictl stop f6d05272b57e # replace with the ID of your container crictl stop 129fd7d382018 # replace with the ID of your container
sleep 20 sleep 20
crictl ps crictl ps
``` ```
``` ```
CONTAINER ID IMAGE COMMAND CREATED ... CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID
5b920cbaf8b1 nginx:latest "nginx -g 'daemon of 2 seconds ago ... 89db4553e1eeb docker.io/library/nginx@sha256:... 19 seconds ago Running web 1 34533c6729106
``` ```
## Dynamic addition and removal of static pods ## Dynamic addition and removal of static pods
@ -236,7 +238,6 @@ sleep 20
crictl ps crictl ps
``` ```
``` ```
CONTAINER ID IMAGE COMMAND CREATED ... CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID
e7a62e3427f1 nginx:latest "nginx -g 'daemon of 27 seconds ago f427638871c35 docker.io/library/nginx@sha256:... 19 seconds ago Running web 1 34533c6729106
``` ```