From bac1f1c73db9c55a18b41b76922572fd2620f3d5 Mon Sep 17 00:00:00 2001
From: Andrew D. France
Date: Tue, 22 Jul 2025 21:00:10 -0500
Subject: Fixing Jenkins Setup: Attempt2

---
 Dockerfile.jenkins | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

(limited to 'Dockerfile.jenkins')

diff --git a/Dockerfile.jenkins b/Dockerfile.jenkins
index 874941a..23a95f1 100644
--- a/Dockerfile.jenkins
+++ b/Dockerfile.jenkins
@@ -2,10 +2,12 @@
 # Use the official Jenkins image as a base
 FROM jenkins/jenkins:lts-jdk17
 
-# Pass the Docker group ID from the host as a build argument
+# Pass Host User, Group, and Docker Group IDs as build arguments
+ARG UID
+ARG GID
 ARG DOCKER_GID
 
-# Switch to root user to install dependencies
+# Switch to root user to install dependencies and manage users
 USER root
 
 # Install Docker CLI so Jenkins can interact with the host's Docker daemon
@@ -18,12 +20,21 @@ RUN echo "deb [arch=$(dpkg --print-architecture) \
   $(lsb_release -cs) stable" > /etc/apt/sources.list.d/docker.list
 RUN apt-get update && apt-get install -y docker-ce-cli
 
-# Create a 'docker' group with the host's GID to match permissions
-# This is the key step to prevent the container from exiting
-RUN if [ -n "$DOCKER_GID" ]; then groupadd -g $DOCKER_GID docker; else groupadd -g 999 docker; fi
+# Create a docker group with the host's GID to match permissions
+# and add the jenkins user to it.
+RUN if [ -n "$DOCKER_GID" ]; then \
+        groupadd -g $DOCKER_GID docker && \
+        usermod -aG docker jenkins; \
+    fi
 
-# Add the 'jenkins' user to the docker group
-RUN usermod -aG docker jenkins
+# Change the jenkins user and group to match the host.
+# This should ensure file permissions for the jenkins_home volume are correct.
+RUN if [ -n "$GID" ] && [ "$(getent group jenkins | cut -d: -f3)" != "$GID" ]; then \
+        groupmod -g $GID jenkins; \
+    fi
+RUN if [ -n "$UID" ] && [ "$(id -u jenkins)" != "$UID" ]; then \
+        usermod -u $UID jenkins; \
+    fi
 
-# Switch back to the jenkins user
+# Switch to the newly configured jenkins user
 USER jenkins
-- 
cgit v1.2.3-59-g8ed1b