feat: docker non-root uid and gid

docker/entrypoint.sh

@@ -1,14 +1,143 @@
 #!/usr/bin/env sh
-LOG_FILE=/var/log/rpxy/rpxy.log
+LOG_DIR=/rpxy/log
+LOG_FILE=${LOG_DIR}/rpxy.log
+LOG_SIZE=10M
+LOG_NUM=10
 
-if [ -z ${LOG_TO_FILE} ]; then
-  LOG_TO_FILE=false
+LOGGING=${LOG_TO_FILE:-false}
+USER=${HOST_USER:-rpxy}
+USER_ID=${HOST_UID:-900}
+GROUP_ID=${HOST_GID:-900}
+
+#######################################
+# Setup logrotate
+function setup_logrotate () {
+  if [ $LOGROTATE_NUM ]; then
+    LOG_NUM=${LOGROTATE_NUM}
+  fi
+  if [ $LOGROTATE_SIZE ]; then
+    LOG_SIZE=${LOGROTATE_SIZE}
+  fi
+
+  cat > /etc/logrotate.conf << EOF
+# see "man logrotate" for details
+# rotate log files weekly
+weekly
+# use the adm group by default, since this is the owning group
+# of /var/log/syslog.
+# su root adm
+# keep 4 weeks worth of backlogs
+rotate 4
+# create new (empty) log files after rotating old ones
+create
+# use date as a suffix of the rotated file
+#dateext
+# uncomment this if you want your log files compressed
+#compress
+# packages drop log rotation information into this directory
+include /etc/logrotate.d
+# system-specific logs may be also be configured here.
+EOF
+
+  cat > /etc/logrotate.d/rpxy.conf << EOF
+${LOG_FILE} {
+    dateext
+    daily
+    missingok
+    rotate ${LOG_NUM}
+    notifempty
+    compress
+    delaycompress
+    dateformat -%Y-%m-%d-%s
+    size ${LOG_SIZE}
+    copytruncate
+    su ${USER} ${USER}
+}
+EOF
+}
+
+#######################################
+function setup_ubuntu () {
+  # Check the existence of the user, if not exist, create it.
+  if [ ! $(id ${USER}) ]; then
+    echo "rpxy: Create user ${USER} with ${USER_ID}:${GROUP_ID}"
+    groupadd -g ${GROUP_ID} ${USER}
+    useradd -u ${USER_ID} -g ${GROUP_ID} ${USER}
+  fi
+
+  # for crontab when logging
+  if "${LOGGING}"; then
+    # Set up logrotate
+    setup_logrotate
+
+    # Setup cron
+    mkdir -p /etc/cron.15min/
+    cp -p /etc/cron.daily/logrotate /etc/cron.15min/
+    echo "*/15 * * * * root cd / && run-parts --report /etc/cron.15min" >> /etc/crontab
+    # cp -p /etc/cron.daily/logrotate /etc/cron.hourly/
+    service cron start
+  fi
+}
+
+#######################################
+function setup_alpine () {
+  # Check the existence of the user, if not exist, create it.
+  if [ ! $(id ${USER}) ]; then
+    echo "rpxy: Create user ${USER} with ${USER_ID}:${GROUP_ID}"
+    addgroup -g ${GROUP_ID} ${USER}
+    adduser -H -D -u ${USER_ID} -G ${USER} ${USER}
+  fi
+
+  # for crontab when logging
+  if "${LOGGING}"; then
+    # Set up logrotate
+    setup_logrotate
+
+    # Setup cron
+    cp -f /etc/periodic/daily/logrotate /etc/periodic/15min
+    crond -b -l 8
+  fi
+}
+
+#######################################
+
+if [ $(whoami) != "root" -o $(id -u) -ne 0 -a $(id -g) -ne 0 ]; then
+  echo "Do not execute 'docker run' or 'docker-compose up' with a specific user through '-u'."
+  echo "If you want to run 'rpxy' with a specific user, use HOST_USER, HOST_UID and HOST_GID environment variables."
+  exit 1
 fi
 
-if "${LOG_TO_FILE}"; then
+# Check gosu or su-exec, determine linux distribution, and set up user
+if [ $(command -v gosu) ]; then
+  # Ubuntu Linux
+  alias gosu='gosu'
+  setup_ubuntu
+  LINUX="Ubuntu"
+elif [ $(command -v su-exec) ]; then
+  # Alpine Linux
+  alias gosu='su-exec'
+  setup_alpine
+  LINUX="Alpine"
+else
+  echo "Unknown distribution!"
+  exit 1
+fi
+
+# Check the given user and its uid:gid
+if [ $(id -u ${USER}) -ne ${USER_ID} -a $(id -g ${USER}) -ne ${GROUP_ID} ]; then
+  echo "${USER} exists or was previously created. However, its uid and gid are inconsistent. Please recreate your container."
+  exit 1
+fi
+
+# Change permission according to the given user
+chown -R ${USER_ID}:${USER_ID} /rpxy
+
+# Run rpxy
+echo "rpxy: Start with user: ${USER} (${USER_ID}:${USER_ID})"
+if "${LOGGING}"; then
   echo "rpxy: Start with writing log file"
-  /run.sh 2>&1 | tee $LOG_FILE
+  gosu ${USER} sh -c "/rpxy/run.sh 2>&1 | tee ${LOG_FILE}"
 else
   echo "rpxy: Start without writing log file"
-  /run.sh 2>&1
+  gosu ${USER} sh -c "/rpxy/run.sh 2>&1"
 fi