add the old snippet md files

old_snippets/watch-command.en.md

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+---
+title: "watch command"
+date: 2020-01-27T15:47:22+01:00
+draft: false
+snippet_types: ["watch"]
+---
+
+Currently at work we occasionally have to redeploy pods that have the same image tag but different
+SHA hashes. The problem stems from the k8s deployments not picking up the changes and thus a
+manually killing of the production pods is required. When they are restarted the SHA is checked and
+new image pulled, during this process I like to watch along at the running pods to make sure things
+are going smoothly.
+
+I use to use the built in watch argument of k8s get pods command **-w**:
+
+
+```shell
+$ kubectl get pods -n shop -w
+```
+
+But this produces a really cluttered terminal output so I started just running the command on loop
+
+```shell
+$ while true; do; kubectl get pods -n shop ; sleep 5; done
+```
+
+Then a coworker showed me the watch command which has a much cleaner interface and outputs to a much
+clearer less/more like non scrolling output.
+
+
+```shell
+$ watch -n 5 'kubectl get pods -n shop'
+```
+
+The watch command is availble via brew
+
+```shell
+$ brew install watch
+```
+
+source:
+
+https://gitlab.com/procps-ng/procps/blob/master/watch.c
+