fix: fix a "watch" bug due to docker limitation

docker/Dockerfile

@@ -57,7 +57,9 @@ RUN apt-get update && \
   find / -type d -path /proc -prune -o -type f -perm /u+s -ignore_readdir_race -exec chmod u-s {} \; && \
   find / -type d -path /proc -prune -o -type f -perm /g+s -ignore_readdir_race -exec chmod g-s {} \; && \
   mkdir -p /rpxy/bin &&\
-  mkdir -p /rpxy/log
+  mkdir -p /rpxy/log &&\
+  mkdir -p /rpxy/cache &&\
+  mkdir -p /rpxy/config
 
 COPY --from=builder /tmp/target/release/rpxy /rpxy/bin/rpxy
 COPY ./docker/run.sh /rpxy

docker/Dockerfile-slim

@@ -38,7 +38,9 @@ RUN apk add --no-cache ${RUNTIME_DEPS} && \
   find / -type d -path /proc -prune -o -type f -perm /u+s -exec chmod u-s {} \; && \
   find / -type d -path /proc -prune -o -type f -perm /g+s -exec chmod g-s {} \; && \
   mkdir -p /rpxy/bin &&\
-  mkdir -p /rpxy/log
+  mkdir -p /rpxy/log &&\
+  mkdir -p /rpxy/cache &&\
+  mkdir -p /rpxy/config
 
 COPY --from=builder /tmp/target/release/rpxy /rpxy/bin/rpxy
 COPY ./docker/run.sh /rpxy

docker/docker-compose-slim.yml

@@ -28,7 +28,11 @@ services:
     tty: false
     privileged: true
     volumes:
-      - ./log:/rpxy/log
+      - ./log:/rpxy/log:rw
+      - ./cache:/rpxy/cache:rw
       - ../example-certs/server.crt:/certs/server.crt:ro
       - ../example-certs/server.key:/certs/server.key:ro
-      - ../config-example.toml:/etc/rpxy.toml:ro
+      - ../config-example.toml:/etc/rpxy/rpxy.toml:ro
+      # NOTE: To correctly enable "watch" in docker,
+      # ** you should mount not a file but a dir mapped to /rpxy/config including "rpxy.toml" due to the limitation of docker **
+      # e.g, - ./rpxy-config:/rpxy/config

docker/docker-compose.yml

@@ -28,7 +28,11 @@ services:
     tty: false
     privileged: true
     volumes:
-      - ./log:/rpxy/log
+      - ./log:/rpxy/log:rw
+      - ./cache:/rpxy/cache:rw
       - ../example-certs/server.crt:/certs/server.crt:ro
       - ../example-certs/server.key:/certs/server.key:ro
       - ../config-example.toml:/etc/rpxy.toml:ro
+      # NOTE: To correctly enable "watch" in docker,
+      # ** you should mount not a file but a dir mapped to /rpxy/config including "rpxy.toml" due to the limitation of docker **
+      # e.g, - ./rpxy-config:/rpxy/config

docker/entrypoint.sh

@@ -9,6 +9,10 @@ USER=${HOST_USER:-rpxy}
 USER_ID=${HOST_UID:-900}
 GROUP_ID=${HOST_GID:-900}
 
+CONFIG_FILE=/etc/rpxy.toml
+CONFIG_DIR=/rpxy/config
+CONFIG_FILE_IN_DIR=${CONFIG_FILENAME:-rpxy.toml}
+
 #######################################
 # Setup logrotate
 function setup_logrotate () {
@@ -132,9 +136,23 @@ if [ $(id -u ${USER}) -ne ${USER_ID} -a $(id -g ${USER}) -ne ${GROUP_ID} ]; then
 fi
 
 # Change permission according to the given user
-chown -R ${USER_ID}:${USER_ID} /rpxy
+# except for the config dir that possibly get mounted with read-only
+find /rpxy -path ${CONFIG_DIR} -prune -o -exec chown ${USER_ID}:${USER_ID} {} +
+
+# Check the config file existence
+if [[ ! -f ${CONFIG_FILE} ]]; then
+  if [[ ! -f ${CONFIG_DIR}/${CONFIG_FILE_IN_DIR} ]]; then
+    echo "No config file is given. Mount a config dir or file."
+    exit 1
+  fi
+  echo "rpxy: config file: ${CONFIG_DIR}/${CONFIG_FILE_IN_DIR}"
+  ln -s ${CONFIG_DIR}/${CONFIG_FILE_IN_DIR} ${CONFIG_FILE}
+else
+  echo "rpxy: config file: ${CONFIG_FILE}"
+fi
 
 # Run rpxy
+cd /rpxy
 echo "rpxy: Start with user: ${USER} (${USER_ID}:${GROUP_ID})"
 if "${LOGGING}"; then
   echo "rpxy: Start with writing log file"