From 945a8f108f464bab1b7115be5ddc9bad57d77308 Mon Sep 17 00:00:00 2001
From: Miguel <miguelsys@proton.me>
Date: Thu, 16 Feb 2023 10:16:57 +0100
Subject: [PATCH] Export CLI args as ENV variables in Docker container

---
 Dockerfile |  8 ++++++--
 README.md  | 18 +++++++++++++++++-
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index ec1552e..2c43f02 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,10 +6,14 @@ ENV POSTGRES_PASSWORD postgres
 ENV POSTGRES_DATABASE postgres
 ENV PGPOOL_SERVICE localhost
 ENV PGPOOL_SERVICE_PORT 9999
+ENV PGPOOL_LISTEN_ADDRESS 9179
+ENV PGPOOL_METRICS_PATH /metrics
+ENV PGPOOL_LOG_LEVEL info
+ENV PGPOOL_LOG_FORMAT logfmt
 ENV SSLMODE disable
 
 COPY pgpool2_exporter /bin/pgpool2_exporter
 
-CMD ["/bin/sh", "-c", "export DATA_SOURCE_USER=\"${POSTGRES_USERNAME}\" ; export DATA_SOURCE_PASS=\"${POSTGRES_PASSWORD}\" ; export DATA_SOURCE_URI=\"${PGPOOL_SERVICE}:${PGPOOL_SERVICE_PORT}/${POSTGRES_DATABASE}?sslmode=${SSLMODE}\" ; /bin/pgpool2_exporter"]
+CMD ["/bin/sh", "-c", "export PGPOOL_LOG_LEVEL=\"${PGPOOL_LOG_LEVEL}\"; export PGPOOL_LOG_FORMAT=\"${PGPOOL_LOG_FORMAT}\"; export PGPOOL_METRICS_PATH=\"${PGPOOL_METRICS_PATH}\"; export PGPOOL_LISTEN_ADDRESS=\"${PGPOOL_LISTEN_ADDRESS}\"; export DATA_SOURCE_USER=\"${POSTGRES_USERNAME}\" ; export DATA_SOURCE_PASS=\"${POSTGRES_PASSWORD}\" ; export DATA_SOURCE_URI=\"${PGPOOL_SERVICE}:${PGPOOL_SERVICE_PORT}/${POSTGRES_DATABASE}?sslmode=${SSLMODE}\" ; /bin/pgpool2_exporter --web.listen-address=:${PGPOOL_LISTEN_ADDRESS} --web.telemetry-path=${PGPOOL_METRICS_PATH} --log.level=${PGPOOL_LOG_LEVEL} --log.format=${PGPOOL_LOG_FORMAT}"]
 
-EXPOSE     9719
+EXPOSE ${PGPOOL_LISTEN_ADDRESS}
diff --git a/README.md b/README.md
index 97b41f9..64d5bc4 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,19 @@ This package is available for Docker. The following environment variables config
 
 * `PGPOOL_SERVICE_PORT`
   Pgpool-II port number. Default is `9999`.
-  
+
+* `PGPOOL_LISTEN_ADDRESS`
+  Pgpool-II metrics listen address. Default is `9179`.
+
+* `PGPOOL_METRICS_PATH`
+  Pgpool-II metrics path. Default is `/metrics`.
+
+* `PGPOOL_LOG_LEVEL`
+  Pgpool-II log level. Default is `info`.
+
+* `PGPOOL_LOG_FORMAT`
+  Pgpool-II log format. Default is `logfmt`.
+
 * `SSLMODE`
    Whether or not to use SSL. Default is `disable`. Valid values: disable, require, verify-ca, verify-full.
   
@@ -80,6 +92,10 @@ docker run --name pgpool2_exporter \
   -e POSTGRES_DATABASE=<database> \
   -e PGPOOL_SERVICE=<hostname> \
   -e PGPOOL_SERVICE_PORT=<port> \
+  -e PGPOOL_LISTEN_ADDRESS=<listen port> \
+  -e PGPOOL_METRICS_PATH=<path> \
+  -e PGPOOL_LOG_LEVEL=<log level> \
+  -e PGPOOL_LOG_FORMAT=<log format> \
   -e SSLMODE=<sslmode> \
   pgpool/pgpool2_exporter:latest
 ```