feat: Dynamic root directory to workaround clashing docker labels (#13)

Dockerfile

@@ -33,6 +33,9 @@ RUN apt-get update && \
     chown -R github-runner /var/lib/github-runner && \
     /var/lib/github-runner/bin/installdependencies.sh && \
     chmod a+x /var/lib/github-runner/start.sh && \
+    # Create directory for runner root dirs
+    mkdir /var/lib/github-runner-instance && \
+    chown -R github-runner /var/lib/github-runner-instance && \
     # Install Docker CLI
     apt-get install -y --no-install-recommends \
       ca-certificates=20210119 \

docker-compose.yml

@@ -2,12 +2,13 @@ version: "3.7"
 services:
   github-runner:
     build: .
-    image: homecentr/github-runner
+    image: homecentr/github-runner:local
     restart: unless-stopped
     environment:
       GH_OWNER: homecentr
       GH_TOKEN: ${GH_TOKEN}
       RUNNER_NAME: "Test runner"
-      RUNNER_DIR: "/var/lib/github-runner/runner1"
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
+    extra_hosts:
+      - "host.docker.internal:host-gateway"

start.sh

@@ -3,19 +3,26 @@
 GH_OWNER=$GH_OWNER
 GH_TOKEN=$GH_TOKEN
 
-CONTAINER_ID=$(head -1 /proc/self/cgroup | cut -d/ -f3 | cut -c1-5)
-RUNNER_NAME="$RUNNER_NAME-$CONTAINER_ID"
+export CONTAINER_ID=$(head -1 /proc/self/cgroup | cut -d/ -f3 | cut -c1-5)
+export RUNNER_NAME="${RUNNER_NAME}-${CONTAINER_ID}"
+
+echo "Container ID: $CONTAINER_ID"
+
+# Create a root directory symlink to get a different Docker instance id hash
+ROOT_DIR="/var/lib/github-runner-instance/$CONTAINER_ID"
+ln -s "$PWD" "$ROOT_DIR"
+cd "$ROOT_DIR"
 
 echo "Connecting to GitHub org: $GH_OWNER"
 echo "Runner name: $RUNNER_NAME"
 
 REG_TOKEN=$(curl -sX POST -H "Accept: application/vnd.github.v3+json" -H "Authorization: token ${GH_TOKEN}" https://api.github.com/orgs/${GH_OWNER}/actions/runners/registration-token | jq .token --raw-output)
 
-./config.sh --unattended --url https://github.com/${GH_OWNER} --token ${REG_TOKEN} --name ${RUNNER_NAME}
+./config.sh --unattended --url "https://github.com/${GH_OWNER}" --token "${REG_TOKEN}" --name "${RUNNER_NAME}"
 
 cleanup() {
     echo "Removing runner..."
-    ./config.sh remove --unattended --token ${REG_TOKEN}
+    ./config.sh remove --unattended --token "${REG_TOKEN}"
 }
 
 trap 'cleanup; exit 130' INT