From 14d10bc21087e3734d4e7ac15883c76d0cd19818 Mon Sep 17 00:00:00 2001
From: "Suren A. Chilingaryan" <csa@suren.me>
Date: Sat, 17 Mar 2018 21:07:38 +0100
Subject: MySQL 5.7 with Galera (produced as combination of standard MySQL
container and openshift-mariadb-galera by adfinis-sygroup)
---
.../container-scripts/mysql/galera/cluster.cnf | 4 ++
.../mysql/galera/configure-galera.sh | 48 ++++++++++++++++++++++
2 files changed, 52 insertions(+)
create mode 100644 root-galera/usr/share/container-scripts/mysql/galera/cluster.cnf
create mode 100755 root-galera/usr/share/container-scripts/mysql/galera/configure-galera.sh
(limited to 'root-galera/usr/share/container-scripts/mysql/galera')
diff --git a/root-galera/usr/share/container-scripts/mysql/galera/cluster.cnf b/root-galera/usr/share/container-scripts/mysql/galera/cluster.cnf
new file mode 100644
index 0000000..5e9d444
--- /dev/null
+++ b/root-galera/usr/share/container-scripts/mysql/galera/cluster.cnf
@@ -0,0 +1,4 @@
+[mysqld]
+# By default every node is standalone
+wsrep_cluster_address=gcomm://
+wsrep_node_address=127.0.0.1
diff --git a/root-galera/usr/share/container-scripts/mysql/galera/configure-galera.sh b/root-galera/usr/share/container-scripts/mysql/galera/configure-galera.sh
new file mode 100755
index 0000000..05829a4
--- /dev/null
+++ b/root-galera/usr/share/container-scripts/mysql/galera/configure-galera.sh
@@ -0,0 +1,48 @@
+#! /bin/bash
+
+# Copyright 2016 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script writes out a mysql galera config using a list of newline seperated
+# peer DNS names it accepts through stdin.
+
+# /etc/mysql is assumed to be a shared volume so we can modify my.cnf as required
+# to keep the config up to date, without wrapping mysqld in a custom pid1.
+# The config location is intentionally not /etc/mysql/my.cnf because the
+# standard base image clobbers that location.
+CFG=/etc/my.cnf.d/cluster.cnf
+
+function join {
+ local IFS="$1"; shift; echo "$*";
+}
+
+HOSTNAME=$(hostname)
+while read -ra LINE; do
+ if [[ "${LINE}" == *"${HOSTNAME}"* ]]; then
+ MY_NAME=$LINE
+ fi
+ PEERS=("${PEERS[@]}" $LINE)
+done
+
+if [ "${#PEERS[@]}" = 1 ]; then
+ WSREP_CLUSTER_ADDRESS=""
+else
+ WSREP_CLUSTER_ADDRESS=$(join , "${PEERS[@]}")
+fi
+
+sed -i -e "s|^wsrep_node_address=.*$|wsrep_node_address=${MY_NAME}|" ${CFG}
+sed -i -e "s|^wsrep_cluster_address=.*$|wsrep_cluster_address=gcomm://${WSREP_CLUSTER_ADDRESS}|" ${CFG}
+
+# don't need a restart, we're just writing the conf in case there's an
+# unexpected restart on the node.
--
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