Add Azure external provider example

contrib/providers.d/azure/cloudconfig/install_runner.tpl

@@ -0,0 +1,61 @@
+#!/bin/bash
+
+set -ex
+set -o pipefail
+
+CALLBACK_URL="GARM_CALLBACK_URL"
+BEARER_TOKEN="GARM_CALLBACK_TOKEN"
+DOWNLOAD_URL="GH_DOWNLOAD_URL"
+FILENAME="GH_FILENAME"
+TARGET_URL="GH_TARGET_URL"
+RUNNER_TOKEN="GH_RUNNER_TOKEN"
+RUNNER_NAME="GH_RUNNER_NAME"
+RUNNER_LABELS="GH_RUNNER_LABELS"
+
+function call() {
+	PAYLOAD="$1"
+	curl -s -X POST -d "${PAYLOAD}" -H 'Accept: application/json' -H "Authorization: Bearer ${BEARER_TOKEN}" "${CALLBACK_URL}" || echo "failed to call home: exit code ($?)"
+}
+
+function sendStatus() {
+	MSG="$1"
+	call "{\"status\": \"installing\", \"message\": \"$MSG\"}"
+}
+
+function success() {
+	MSG="$1"
+	call "{\"status\": \"idle\", \"message\": \"$MSG\"}"
+}
+
+function fail() {
+	MSG="$1"
+	call "{\"status\": \"failed\", \"message\": \"$MSG\"}"
+	exit 1
+}
+
+
+
+sendStatus "downloading tools from ${DOWNLOAD_URL}"
+curl -L -o "/home/runner/${FILENAME}" "${DOWNLOAD_URL}" || fail "failed to download tools"
+
+mkdir -p /home/runner/actions-runner || fail "failed to create actions-runner folder"
+
+sendStatus "extracting runner"
+tar xf "/home/runner/${FILENAME}" -C /home/runner/actions-runner/ || fail "failed to extract runner"
+chown runner:runner -R /home/runner/actions-runner/ || fail "failed to change owner"
+
+sendStatus "installing dependencies"
+cd /home/runner/actions-runner
+sudo ./bin/installdependencies.sh || fail "failed to install dependencies"
+
+sendStatus "configuring runner"
+sudo -u runner -- ./config.sh --unattended --url "${TARGET_URL}" --token "${RUNNER_TOKEN}" --name "${RUNNER_NAME}" --labels "${RUNNER_LABELS}" --ephemeral || fail "failed to configure runner"
+
+sendStatus "installing runner service"
+./svc.sh install runner || fail "failed to install service"
+
+sendStatus "starting service"
+./svc.sh start || fail "failed to start service"
+
+success "runner successfully installed"
+

contrib/providers.d/azure/cloudconfig/userdata.tpl

@@ -0,0 +1,29 @@
+#cloud-config
+package_upgrade: true
+packages:
+    - curl
+    - tar
+system_info:
+    default_user:
+        name: runner
+        home: /home/runner
+        shell: /bin/bash
+        groups:
+            - sudo
+            - adm
+            - cdrom
+            - dialout
+            - dip
+            - video
+            - plugdev
+            - netdev
+        sudo: ALL=(ALL) NOPASSWD:ALL
+runcmd:
+    - /install_runner.sh
+    - rm -f /install_runner.sh
+write_files:
+    - encoding: b64
+      content: RUNNER_INSTALL_B64
+      owner: root:root
+      path: /install_runner.sh
+      permissions: "755"

contrib/providers.d/azure/config.sh

@@ -0,0 +1,8 @@
+# Azure service principal credentials
+export AZURE_SUBSCRIPTION_ID="<SUBSCRIPTION_ID>"
+export AZURE_TENANT_ID="<TENANT_ID>"
+export AZURE_CLIENT_ID="<CLIENT_ID>"
+export AZURE_CLIENT_SECRET="<CLIENT_SECRET>"
+
+# GARM config
+export LOCATION="westeurope"