From a4c7d803b17f78ef7cc170135c7bcb51c3ef6cde Mon Sep 17 00:00:00 2001
From: Bo Peng <pengbo@sraoss.co.jp>
Date: Fri, 24 Sep 2021 22:11:04 +0900
Subject: [PATCH] Add new environment variable "POSTGRES_DATABASE".

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

diff --git a/Dockerfile b/Dockerfile
index 2b9e8ce..0aae7f3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,6 +3,7 @@ LABEL maintainer="Bo Peng <pengbo@sraoss.co.jp>"
 
 ENV POSTGRES_USERNAME postgres
 ENV POSTGRES_PASSWORD postgres
+ENV POSTGRES_DATABASE postgres
 ENV PGPOOL_SERVICE localhost
 ENV PGPOOL_SERVICE_PORT 9999
 
@@ -10,6 +11,6 @@ ENV PGPOOL_SERVICE_PORT 9999
 COPY pgpool2_exporter /bin/pgpool2_exporter
 
 
-CMD ["/bin/sh", "-c", "export DATA_SOURCE_NAME=\"postgresql://${POSTGRES_USERNAME}:${POSTGRES_PASSWORD}@${PGPOOL_SERVICE}:${PGPOOL_SERVICE_PORT}/postgres?sslmode=disable\" ; /bin/pgpool2_exporter"]
+CMD ["/bin/sh", "-c", "export DATA_SOURCE_NAME=\"postgresql://${POSTGRES_USERNAME}:${POSTGRES_PASSWORD}@${PGPOOL_SERVICE}:${PGPOOL_SERVICE_PORT}/${POSTGRES_DATABASE}?sslmode=disable\" ; /bin/pgpool2_exporter"]
 
 EXPOSE     9719
diff --git a/README.md b/README.md
index 642aceb..ca36932 100644
--- a/README.md
+++ b/README.md
@@ -53,10 +53,13 @@ This package is available for Docker. The following environment variables config
 
 * `POSTGRES_PASSWORD`
   PostgreSQL user password. Default is `postgres`.
-  
+
+* `POSTGRES_DATABASE`
+  Database name. Default is `postgres`.
+
 * `PGPOOL_SERVICE`
   Pgpool-II hostname. Default is `localhost`.
-  
+
 * `PGPOOL_SERVICE_PORT`
   Pgpool-II port number. Default is `9999`.
 
@@ -65,6 +68,7 @@ docker run --name pgpool2_exporter \
   --net=host --rm \
   -e POSTGRES_USERNAME=<username> \
   -e POSTGRES_PASSWORD=<password> \
+  -e POSTGRES_DATABASE=<database> \
   -e PGPOOL_SERVICE=<hostname> \
   -e PGPOOL_SERVICE_PORT=<port> \
   pgpool/pgpool2_exporter:latest