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deploy-on-merge: add path-based host limiting (#41)
Instead of deploying to the entire fleet on every merge, detect which files changed and limit ansible-playbook to only affected hosts. Maps ansible roles, services, and host_vars to their target hosts. Falls back to full fleet deploy for unmapped paths or changes to shared infrastructure (common role, deploy.yml, inventory). Closes PESO-108
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1 changed files with 122 additions and 2 deletions
124
.github/workflows/deploy-on-merge.yml
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124
.github/workflows/deploy-on-merge.yml
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@ -14,18 +14,126 @@ on:
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jobs:
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deploy:
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name: Deploy to all
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name: Deploy
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runs-on: ubuntu-latest
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environment: production
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steps:
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- uses: actions/checkout@v4
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with:
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fetch-depth: 2
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- name: Determine deploy scope from changed files
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id: scope
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run: |
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# Get files changed in this push
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CHANGED=$(git diff --name-only HEAD~1 HEAD)
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echo "Changed files:"
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echo "$CHANGED"
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echo ""
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HOSTS=""
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DEPLOY_ALL=false
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while IFS= read -r file; do
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[ -z "$file" ] && continue
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case "$file" in
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# --- Roles that target ALL hosts → full fleet deploy ---
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ansible/roles/common/*|ansible/roles/dotfiles/*|ansible/roles/node_exporter/*)
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DEPLOY_ALL=true ;;
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# --- Playbook, inventory, or requirements → full fleet ---
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ansible/deploy.yml|ansible/inventory/hosts.ini|ansible/requirements.yml)
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DEPLOY_ALL=true ;;
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# --- host_vars → that specific host ---
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ansible/inventory/host_vars/helsinki-a.yml) HOSTS="$HOSTS helsinki-a" ;;
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ansible/inventory/host_vars/london-b.yml) HOSTS="$HOSTS london-b" ;;
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ansible/inventory/host_vars/london-a.yml) HOSTS="$HOSTS london-a" ;;
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ansible/inventory/host_vars/nuremberg-a.yml) HOSTS="$HOSTS nuremberg-a" ;;
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ansible/inventory/host_vars/copenhagen-a.yml) HOSTS="$HOSTS copenhagen-a" ;;
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ansible/inventory/host_vars/copenhagen-c.yml) HOSTS="$HOSTS copenhagen-c" ;;
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# --- Roles → mapped hosts ---
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ansible/roles/caddy/*|ansible/roles/status_page/*)
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HOSTS="$HOSTS helsinki-a" ;;
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ansible/roles/docker/*)
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HOSTS="$HOSTS helsinki-a london-b nuremberg-a copenhagen-a" ;;
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ansible/roles/docker_services/*)
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HOSTS="$HOSTS helsinki-a london-b nuremberg-a copenhagen-a" ;;
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ansible/roles/media_stack/*|ansible/roles/backup/*)
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HOSTS="$HOSTS london-b" ;;
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ansible/roles/firewall_alpine/*)
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HOSTS="$HOSTS nuremberg-a" ;;
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ansible/roles/systemd_services/*)
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HOSTS="$HOSTS helsinki-a copenhagen-a" ;;
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ansible/roles/zfs/*)
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HOSTS="$HOSTS london-a london-b" ;;
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# --- Services → mapped hosts ---
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# helsinki-a services
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ansible/services/caddy/*|ansible/services/status-page/*)
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HOSTS="$HOSTS helsinki-a" ;;
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ansible/services/authelia/*|ansible/services/forgejo/*|ansible/services/bitwarden/*)
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HOSTS="$HOSTS helsinki-a" ;;
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ansible/services/thiswebsitedoesnotexist/*)
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HOSTS="$HOSTS helsinki-a" ;;
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# london-a services (monitoring)
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ansible/services/prometheus/*|ansible/services/grafana/*)
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HOSTS="$HOSTS london-a" ;;
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# london-b services (media/storage)
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ansible/services/nextcloud-aio/*|ansible/services/jellyseerr/*)
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HOSTS="$HOSTS london-b" ;;
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ansible/services/navidrome/*|ansible/services/slskd/*|ansible/services/miniflux/*)
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HOSTS="$HOSTS london-b" ;;
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ansible/services/smartctl-exporter/*|ansible/services/plex-exporter/*)
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HOSTS="$HOSTS london-b" ;;
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ansible/services/transmission/*|ansible/services/radarr/*|ansible/services/prowlarr/*)
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HOSTS="$HOSTS london-b" ;;
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ansible/services/lidarr/*|ansible/services/readarr/*|ansible/services/whisparr/*)
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HOSTS="$HOSTS london-b" ;;
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ansible/services/samba/*|ansible/services/vsftpd/*)
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HOSTS="$HOSTS london-b" ;;
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# nuremberg-a services (mail)
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ansible/services/poste-io/*)
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HOSTS="$HOSTS nuremberg-a" ;;
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# copenhagen-a services (gaming)
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ansible/services/minecraft/*|ansible/services/mangos-*|ansible/services/cloudflared/*)
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HOSTS="$HOSTS copenhagen-a" ;;
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# --- Unmapped ansible paths → full fleet as safety fallback ---
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ansible/*)
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echo "⚠️ Unmapped path: $file — deploying to all"
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DEPLOY_ALL=true ;;
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# Non-ansible files (docs, Makefile, etc.) → skip
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*) ;;
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esac
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done <<< "$CHANGED"
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if [ "$DEPLOY_ALL" = "true" ] || [ -z "$HOSTS" ]; then
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echo "Deploy scope: ALL hosts"
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echo "limit=" >> "$GITHUB_OUTPUT"
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echo "skip=false" >> "$GITHUB_OUTPUT"
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else
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UNIQUE=$(echo "$HOSTS" | tr ' ' '\n' | grep -v '^$' | sort -u | tr '\n' ',' | sed 's/,$//')
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echo "Deploy scope: --limit $UNIQUE"
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echo "limit=$UNIQUE" >> "$GITHUB_OUTPUT"
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echo "skip=false" >> "$GITHUB_OUTPUT"
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fi
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- name: Set up Tailscale
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if: steps.scope.outputs.skip != 'true'
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uses: tailscale/github-action@v3
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with:
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authkey: ${{ secrets.TAILSCALE_AUTHKEY }}
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- name: Set up SSH key
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if: steps.scope.outputs.skip != 'true'
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run: |
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mkdir -p ~/.ssh
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echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
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ssh-keyscan -H 100.67.6.27 100.84.65.101 100.122.219.41 100.117.235.28 100.89.206.60 100.115.45.53 >> ~/.ssh/known_hosts 2>/dev/null || true
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- name: Install tools
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if: steps.scope.outputs.skip != 'true'
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run: |
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pip install ansible
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wget -qO /tmp/sops.deb https://github.com/getsops/sops/releases/download/v3.9.4/sops_3.9.4_amd64.deb
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sudo dpkg -i /tmp/sops.deb
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- name: Install Ansible collections
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if: steps.scope.outputs.skip != 'true'
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run: ansible-galaxy install -r ansible/requirements.yml
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- name: Decrypt secrets
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if: steps.scope.outputs.skip != 'true'
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env:
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SOPS_AGE_KEY: ${{ secrets.AGE_SECRET_KEY }}
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run: |
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@ -53,7 +164,16 @@ jobs:
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done
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- name: Run playbook
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if: steps.scope.outputs.skip != 'true'
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working-directory: ansible/
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env:
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ANSIBLE_HOST_KEY_CHECKING: "false"
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run: ansible-playbook deploy.yml
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run: |
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LIMIT="${{ steps.scope.outputs.limit }}"
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if [ -n "$LIMIT" ]; then
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echo "🎯 Deploying with --limit $LIMIT"
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ansible-playbook deploy.yml --limit "$LIMIT"
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else
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echo "🌐 Deploying to all hosts"
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ansible-playbook deploy.yml
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fi
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