K8s Applications mit MicroK8S auf Raspberry PI. Alfred Sabitzer

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      alfred@monitoring:~/GetInfo$ ll *.tar

      -rw-rw-r-- 1 alfred alfred 326244864 Oct 15 21:27 getinfo.tar

      alfred@monitoring:~/GetInfo$

      Wir können aber auch das Dockerfile selbst exportieren.

      alfred@monitoring:~/GetInfo$ docker ps -all

      CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

      acdf3516a1ce docker.registry:5000/getinfo:20211015 "/GetInfo" 10 minutes ago Exited (2) 5 minutes ago funny_keller

      alfred@monitoring:~/GetInfo$ docker export acdf3516a1ce > getinfo.tar

      alfred@monitoring:~/GetInfo$

      alfred@monitoring:~/GetInfo$ ll -h *.tar

      -rw-rw-r-- 1 alfred alfred 311M Oct 15 21:32 getinfo.tar

      alfred@monitoring:~/GetInfo$

      alfred@monitoring:~/GetInfo$ tar -tvf getinfo.tar

      Mit diesen Befehlen kann man überprüfen was alles im Container drinnenn ist (und das ist eine ganze Menge).

      Nun pushen wir den Container in das remote-Repository. Es werden natürlich alle Layer gepushed (in dem Falle gab es die darunterliegenden Layer noch nicht).

      alfred@monitoring:~/GetInfo$ docker push docker.registry:5000/getinfo:20211015

      The push refers to repository [docker.registry:5000/getinfo]

      cae68116d3ec: Pushed

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      20211015: digest: sha256:aa82ba777936d4cec354c0b9c5ece353751a96c9717375cfd58d3ed2beea5cf4 size: 3030

      alfred@monitoring:~/GetInfo$

      Kurze Kontrolle, ob der Container wirklich im Remote Repository gelandet ist.

      alfred@monitoring:~/GetInfo$ curl docker.registry:5000/v2/_catalog

      {"repositories":["getinfo","hello-world"]}

      alfred@monitoring:~/GetInfo$ curl docker.registry:5000/v2/getinfo/tags/list

      {"name":"getinfo","tags":["20211015"]}

      alfred@monitoring:~/GetInfo$

       Abbildung 22: Longhorn Plattengröße

      Auch in der Longhorn-Anzeige kann man schön sehen, dass dieses Volume nicht mehr leer ist, und jetzt bereits ca. 1GB Platz braucht.

      Nun erzeugen wir ein yaml-File.

      ---

      apiVersion: apps/v1

      kind: Deployment

      metadata:

       name: getinfo

       #namespace: default

      spec:

       selector:

       matchLabels:

       app: getinfo

       replicas: 1

       template: