修复容器内的 jenkins 用户无法加入 docker 用户组的问题。 (#2)

Dockerfile

@@ -4,7 +4,9 @@ FROM jenkins/inbound-agent:${BASE_TAG}
 
 USER root
 
-RUN groupadd -g 987 docker && usermod -aG docker jenkins
+COPY start-agent.sh /usr/local/bin/start.sh
+RUN chmod 755 /usr/local/bin/start.sh
+ENTRYPOINT [ "/bin/bash", "/usr/local/bin/start.sh" ]
 
 RUN apt-get update && apt-get install -y \
     ca-certificates \
@@ -16,5 +18,4 @@ RUN apt-get update && apt-get install -y \
     apt-get update && apt-get install -y docker-ce-cli docker-buildx-plugin docker-compose-plugin && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
-USER jenkins
-
+ENV DOCKER_HOST=unix:///var/run/docker.sock

start-agent.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+if [ $(id -u) != "0" ]; then
+  echo "This script must be run as root"
+  exit 1
+fi
+
+if [ -z "$GID" ]; then
+  echo "GID is not set"
+  exit 1
+fi
+if [ -z "$UID" ]; then
+  echo "UID is not set"
+  exit 1
+fi
+if ! grep -q docker /etc/group; then
+  groupadd -g $GID docker && usermod -aG docker jenkins
+  echo "Added docker group"
+fi
+if [ $(id -u jenkins) -ne $UID ]; then
+  usermod -u $UID jenkins
+  echo "Changed jenkins UID"
+fi
+
+echo "Starting agent..."
+runuser -u jenkins -m -g docker -- /bin/bash /usr/local/bin/jenkins-agent $@