Category: Uncategorized

Skopeo – Copy multi arch image from one registry to another registry

login to the repository:

[home@home ~]$ skopeo login --username $USER docker.io
Password: 
Login Succeeded!

Copy:

skopeo copy -a docker://nginx docker://$USER/nginx

References:

Get list of deploy with node selector kubernetes

#!/bin/bash

u_time=$(date +%s)

list_of_namespaces=$(kubectl get ns | awk '{print $1}' | sed 1d)
worker_node_list=$(kubectl get nodes --label-columns beta.kubernetes.io/instance-type --label-columns karpenter.sh/capacity-type -l role=worker | awk '{print $1}' | sed 1d)

for namespace in $list_of_namespaces
do
    echo "================$namespace=================="
    list_of_deploy=$(kubectl get deploy -n $namespace | awk '{print $1}' | sed 1d)

    for deploy in $list_of_deploy
    do
        if [ "$(kubectl get deploy $deploy -n $namespace -o yaml | grep nodeSelector -A 1 | grep role | awk '{print $NF}')" = "worker-arm64" ]
        then
            echo "$deploy,$namespace,true"
            echo "$deploy,$namespace,true" >> prod_deploy_arm64_$u_time.list
        else
            echo "$deploy,$namespace,false"
            echo "$deploy,$namespace,false" >> prod_deploy_arm64_$u_time.list
        fi
    done
done

Helm chart custom values

nginx-chart-files/
├── index.yaml
├── nginx-0.1.0.tgz
└── nginx-0.2.0.tgz

Generate manifest:

helm template ./direcotry  -f values.yaml --output-dir output_dir

helm template ./direcotry -f values.yml

#render in stdout

helm template ./direcotry  -f values.yaml --dry-run
  • Create helm package (.gz file)
helm package ./direcotry_path
apiVersion: {{ template "controller.apiVersion" . }}
kind: {{ .Values.controller.kind }}
metadata:
  labels:
{{ $labels | indent 4 }}
  name: {{ $name }}
  namespace: {{ $.Release.Namespace }}
---
    spec:
    {{- with .Values.controller.hostAliases }}
      hostAliases:
{{ toYaml . | indent 8 }}
    {{- end }}
---

values.yml

controller:
  create: true
  kind: Deployment


---
  terminationGracePeriodSeconds: 30
  hostAliases:
  - hostnames:
    - example.com
    ip: 127.0.0.1

index.html

apiVersion: v1
entries:
  nginx:
  - apiVersion: v2
    appVersion: 1.16.0
    created: "2021-07-03T21:59:00.34571153-04:00"
    digest: b22a325b03c8e88b6a6a8d1a8e79f5d0498813855174a983426466b6de5a5f71
    maintainers:
    - email: [email protected]
      name: John Smith
    name: nginx
    type: application
    urls:
    - https://example.com/charts/nginx-0.1.0.tgz
    version: 0.1.0
  - apiVersion: v2
    appVersion: 1.17.0
    created: "2021-07-03T21:59:00.34571153-04:00"
    digest: b22a325b03c8e88b6a6a8d1a8e79f5d0498813855174a983426466b6de5a5f71
    maintainers:
    - email: [email protected]
      name: John Smith
    name: nginx
    type: application
    urls:
    - https://example.com/charts/nginx-0.2.0.tgz
    version: 0.2.0

https://kodekloud.com/blog/uploading-a-helm-chart/

Push multi-arch docker image

#ARM64
arm64_image_digest=$(docker manifest inspect nginx | jq '.manifests[] | select(.platform.architecture == "arm64")' | jq '.digest'| sed 's/"//g')

#AMD64
amd64_image_digest=$(docker manifest inspect nginx | jq '.manifests[] | select(.platform.architecture == "arm64")' | jq '.digest'| sed 's/"//g')


docker tag nginx your-username/nginx:amd64
docker tag nginx your-username/nginx:arm64

docker push your-username/nginx:amd64
docker push your-username/nginx:arm64


docker manifest create \
your-username/nginx:latest \
--amend your-username/nginx:amd64 \
--amend your-username/nginx:arm64

docker manifest push your-username/nginx:latest

https://www.docker.com/blog/multi-arch-build-and-images-the-simple-way/

export DOCKER_BUILDKIT=1

docker buildx create --use

docker buildx build --push --platform linux/arm64,linux/amd64 -t httpd-custom .

docker buildx stop
docker buildx rm

##10 0.064 .buildkit_qemu_emulator: /bin/sh: Invalid ELF image for this architecture

docker run --rm --privileged multiarch/qemu-user-static:register --reset

docker run --rm --privileged multiarch/qemu-user-static --reset -p yes



docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
docker buildx rm builder
docker buildx create --name builder --driver docker-container --use
docker buildx inspect --bootstrap

https://stackoverflow.com/questions/60080264/docker-cannot-build-multi-platform-images-with-docker-buildx

set and unset in debug bash script

set-x = print actual shell command

set -f = disable filename expansion [ ls *.yml ]

errexit = fails all script if any exit code arrives

pipefail = Failes multi Pipe statement if any false statement 

set -x -f -o errexit -o pipefail
set +x +f +e

https://stackoverflow.com/questions/68465355/what-is-the-meaning-of-set-o-pipefail-in-bash-script

What Does Bash “set -x” do?

https://www.newline.co/courses/newline-guide-to-bash-scripting/errexit

https://unix.stackexchange.com/questions/333867/what-does-set-f-in-korn-shell-do