Add workflow to use loadbalancer as a tunnel to juju controller on k8s #17
Workflow file for this run
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| name: Tunnel to Juju controller via load balancer on k8s | |
| on: | |
| pull_request: | |
| paths-ignore: | |
| - "README.md" | |
| - "project-docs/**" | |
| push: | |
| branches: | |
| - "main" | |
| paths-ignore: | |
| - "README.md" | |
| - "project-docs/**" | |
| # Testing only needs permissions to read the repository contents. | |
| permissions: | |
| contents: read | |
| jobs: | |
| # Ensure project builds before running testing matrix | |
| build: | |
| name: Build | |
| runs-on: ubuntu-latest | |
| timeout-minutes: 5 | |
| steps: | |
| - uses: actions/checkout@v4 | |
| - uses: actions/setup-go@v4 | |
| - run: go build -v . | |
| # Run acceptance tests in a matrix with Terraform CLI versions | |
| add-machine-test: | |
| name: Add Machine | |
| needs: build | |
| runs-on: ubuntu-latest | |
| env: | |
| ACTIONS_ALLOW_IPV6: false | |
| strategy: | |
| fail-fast: false | |
| matrix: | |
| # Only on lxd | |
| cloud: | |
| - "microk8s" | |
| terraform: | |
| - "1.5.*" | |
| timeout-minutes: 60 | |
| steps: | |
| - uses: actions/checkout@v4 | |
| - uses: actions/setup-go@v4 | |
| with: | |
| go-version-file: "go.mod" | |
| cache: true | |
| # set up terraform | |
| - uses: hashicorp/setup-terraform@v2 | |
| with: | |
| terraform_version: ${{ matrix.terraform }} | |
| terraform_wrapper: false | |
| # set up snap, lxd, tox, Juju, bootstrap a controller, etc. | |
| - name: Setup operator environment | |
| uses: charmed-kubernetes/actions-operator@main | |
| with: | |
| provider: ${{ matrix.cloud }} | |
| juju-channel: 2.9/stable | |
| - name: "Set environment to configure provider" | |
| # language=bash | |
| run: | | |
| echo "CONTROLLER=$(juju whoami --format yaml | yq .controller)" >> $GITHUB_ENV | |
| echo "JUJU_USERNAME=$(juju show-controller | yq .$CONTROLLER.account.user)" >> $GITHUB_ENV | |
| echo "JUJU_PASSWORD=$(cat ~/.local/share/juju/accounts.yaml | yq .controllers.$CONTROLLER.password)" >> $GITHUB_ENV | |
| echo "JUJU_CA_CERT=$(juju show-controller | yq .$CONTROLLER.details.ca-cert)" >> $GITHUB_ENV | |
| - run: go mod download | |
| - name: "Bring up loadbalancer & access via terraform plan" | |
| run: | | |
| # Ensure Juju controller name | |
| echo "Controller name: $CONTROLLER" | |
| # Enable Ingress in MicroK8s | |
| sudo microk8s enable ingress | |
| echo "Ingress enabled." | |
| # Determine a subnet for MetalLB | |
| subnet="$(ip route get 1 | head -n 1 | awk '{print $7}' | awk -F. '{print $1 "." $2 "." $3 ".240/24"}')" | |
| echo "MetalLB subnet: $subnet" | |
| # Add the current user to the microk8s group | |
| echo "Adding current user to the microk8s group" | |
| sudo usermod -a -G microk8s $(whoami) | |
| chown -R $(whoami) ~/.kube | |
| # Apply changes to group membership | |
| newgrp microk8s | |
| /snap/microk8s/current/usr/bin/env | |
| # Ensure we have Juju username | |
| echo "Juju Username: $JUJU_USERNAME" | |
| # Display services layout | |
| echo "Services layout:" | |
| sudo microk8s.kubectl get services -n controller-$CONTROLLER | |
| # Create a LoadBalancer service | |
| sudo microk8s.kubectl apply -f - <<EOF | |
| apiVersion: v1 | |
| kind: Service | |
| metadata: | |
| name: controller-service-lb | |
| namespace: controller-$CONTROLLER | |
| spec: | |
| ipFamilies: | |
| - IPv4 | |
| ipFamilyPolicy: SingleStack | |
| ports: | |
| - name: api-server | |
| port: 17070 | |
| protocol: TCP | |
| targetPort: 17070 | |
| selector: | |
| app.kubernetes.io/name: controller | |
| sessionAffinity: None | |
| type: LoadBalancer | |
| EOF | |
| echo "Load Balancer service created." | |
| # Display services layout with the Load Balancer | |
| echo "Services layout with the Load Balancer:" | |
| sudo microk8s.kubectl get services -n controller-$CONTROLLER | |
| # Get the external IP of the Load Balancer service | |
| LB_IP=$(sudo microk8s.kubectl get services -n controller-$CONTROLLER controller-service-lb -o=jsonpath='{.status.loadBalancer.ingress[0].ip}') | |
| echo "Load Balancer IP: $LB_IP" | |
| # Write a Terraform configuration file | |
| echo " | |
| provider \"juju\" { | |
| controller_addresses = [\"$LB_IP\"] | |
| username = $JUJU_USERNAME | |
| password = $JUJU_PASSWORD | |
| ca_certificate = <<-EOT | |
| $JUJU_CA_CERT | |
| EOT | |
| } | |
| resource \"juju_model\" \"testmodel\" { | |
| name = \"test-model\" | |
| } | |
| resource \"juju_application\" \"testapp\" { | |
| name = \"ubuntu\" | |
| model = juju_model.testmodel.name | |
| charm { | |
| name = \"ubuntu\" | |
| } | |
| } | |
| " > ./terraform_config.tf | |
| # Initialize and apply Terraform | |
| echo "Initializing Terraform..." | |
| terraform init | |
| echo "Planning Terraform changes..." | |
| terraform plan | |
| echo "Applying Terraform changes..." | |
| terraform apply --auto-approve | |
| Cleanup: Remove Terraform configuration file | |
| rm ./terraform_config.tf | |