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Helm

Debug with a dry run 

helm install --generate-name ../helm-chart/ --dry-run --debug

Install Helm with APT 

apt-get install gpg curl apt-transport-https --yes
curl https://baltocdn.com/helm/signing.asc | gpg --dearmor | sudo tee /usr/share/keyrings/helm.gpg > /dev/null
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/helm.gpg] https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list
sudo apt-get update && sudo apt-get install helm

Install Helm with APT and Ansible 

- name: Add key without using apt-key
  block:
    - name: download key
      ansible.builtin.get_url:
        url: https://baltocdn.com/helm/signing.asc
        dest: /etc/apt/trusted.gpg.d/helm.asc

    - name: GPG dearmor
      shell: cat /etc/apt/trusted.gpg.d/helm.asc | gpg --dearmor | sudo tee /usr/share/keyrings/helm.gpg > /dev/null

    - name: Add APT source
      ansible.builtin.apt_repository:
        repo: "deb [arch=amd64 signed-by=/etc/apt/trusted.gpg.d/helm.asc] https://baltocdn.com/helm/stable/debian/ all main"
        state: present

- name: Install Helm
  apt:
    pkg:
      - helm
    state: present
    update_cache: yes

Useful repos 

helm repo add jetstack https://charts.jetstack.io  # for cert-manager

Get values from a chart in a repo 

helm show values bitnami/matomo

helm show values bitnami/matomo | yq e

Rollout deployment with MultiAttach error fix 

updateStrategy:
  type: RollingUpdate
  rollingUpdate:
    maxSurge: 0
    maxUnavailable: 1

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