From 3b8eab46009cdd204848454292f1c2139b060939 Mon Sep 17 00:00:00 2001
From: dimti <demidov@dimti.ru>
Date: Fri, 16 Oct 2020 16:54:25 +0300
Subject: [PATCH] * config example rename + master-to-master replication
 functionality

---
 .gitignore                             |  2 +-
 _activate-master-to-master.sh          | 23 +++++++++++++++++++++++
 readbinlog.sh => _activate-slave.sh    |  6 +++---
 dump.sh => _dump.sh                    |  0
 example_config.sh => config.sh-example |  1 +
 start-replication.sh                   | 24 ++++++++++++++++++++++--
 6 files changed, 50 insertions(+), 6 deletions(-)
 create mode 100755 _activate-master-to-master.sh
 rename readbinlog.sh => _activate-slave.sh (81%)
 rename dump.sh => _dump.sh (100%)
 rename example_config.sh => config.sh-example (76%)

diff --git a/.gitignore b/.gitignore
index 680d39f..eff3250 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
 *.log
 .*.cnf
 .idea
-/_*
+/config.sh
diff --git a/_activate-master-to-master.sh b/_activate-master-to-master.sh
new file mode 100755
index 0000000..44c0459
--- /dev/null
+++ b/_activate-master-to-master.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+export DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+CONFIG_FILE=$DIR/_config.sh
+[[ ! -r "${CONFIG_FILE}" ]] && { echo "Could not read ${CONFIG_FILE}!"; exit 1; }
+set -a
+. "${CONFIG_FILE}"
+set +a
+
+# Установка локально и удаленно MASTER-параметров
+echo "Get master status from remote server" >> $log_file
+local_master_status=`mysql --defaults-extra-file=./.remote.my.cnf -e "SHOW MASTER STATUS;
+" -N`
+
+local_master_log_file=`echo $local_master_status | cut -d' ' -f1`
+local_master_log_pos=`echo $local_master_status | cut -d' ' -f2`
+
+echo "Apply bin log position to remote mariadb db instance" >> $log_file
+
+replication_user=`cat ./.remote.my.cnf | grep user | cut -d'=' -f2`
+replication_password=`cat ./.remote.my.cnf | grep password | cut -d'=' -f2`
+replication_host=$localdatabasepublicip
+
+mysql --defaults-extra-file=./.remote.my.cnf -e "CHANGE MASTER TO MASTER_HOST = '$replication_host', MASTER_USER = '$replication_user', MASTER_PASSWORD = '$replication_password', MASTER_LOG_FILE = '$remote_master_log_file', MASTER_LOG_POS = $remote_master_log_pos;"
diff --git a/readbinlog.sh b/_activate-slave.sh
similarity index 81%
rename from readbinlog.sh
rename to _activate-slave.sh
index 5950d4c..e6b59dc 100755
--- a/readbinlog.sh
+++ b/_activate-slave.sh
@@ -16,8 +16,8 @@ remote_master_log_pos=`echo $remote_master_status | cut -d' ' -f2`
 
 echo "Apply bin log position to local mariadb db instance" >> $log_file
 
-replication_user=`cat ./.remote.my.cnf | grep user | cut -d'=' -f2`
-replication_password=`cat ./.remote.my.cnf | grep password | cut -d'=' -f2`
-replication_host=`cat ./.remote.my.cnf | grep host | cut -d'=' -f2`
+replication_user=`cat ./.my.cnf | grep user | cut -d'=' -f2`
+replication_password=`cat ./.my.cnf | grep password | cut -d'=' -f2`
+replication_host=`cat ./.my.cnf | grep host | cut -d'=' -f2`
 
 mysql --defaults-extra-file=./.my.cnf -e "CHANGE MASTER TO MASTER_HOST = '$replication_host', MASTER_USER = '$replication_user', MASTER_PASSWORD = '$replication_password', MASTER_LOG_FILE = '$remote_master_log_file', MASTER_LOG_POS = $remote_master_log_pos;"
diff --git a/dump.sh b/_dump.sh
similarity index 100%
rename from dump.sh
rename to _dump.sh
diff --git a/example_config.sh b/config.sh-example
similarity index 76%
rename from example_config.sh
rename to config.sh-example
index be4fd54..80408d9 100644
--- a/example_config.sh
+++ b/config.sh-example
@@ -1,3 +1,4 @@
 #!/bin/bash
 log_file=replication.log
 databases=( 'database1' 'database2' )
+localdatabasepublicip=
diff --git a/start-replication.sh b/start-replication.sh
index 3ae8280..af1eeca 100755
--- a/start-replication.sh
+++ b/start-replication.sh
@@ -6,14 +6,16 @@ set -a
 . "${CONFIG_FILE}"
 set +a
 
+REMOTE_SQL=
+
 for i in ${databases[@]}
 do
     REMOTE_SQL=$REMOTE_SQL' USE '$i'; FLUSH TABLES WITH READ LOCK;'
 done
 
-REMOTE_SQL=$REMOTE_SQL' system ./readbinlog.sh;'
+REMOTE_SQL=$REMOTE_SQL' system ./_activate-slave.sh;'
 
-REMOTE_SQL=$REMOTE_SQL' system ./dump.sh;'
+REMOTE_SQL=$REMOTE_SQL' system ./_dump.sh;'
 
 for i in ${databases[@]}
 do
@@ -25,3 +27,21 @@ echo "Start execution all commands on remote server" > $log_file
 mysql --defaults-extra-file=./.remote.my.cnf -e "$REMOTE_SQL"
 
 mysql --defaults-extra-file=./.my.cnf -e "START SLAVE;"
+
+if [ "$1" -eq "master-to-master" ]; then
+    LOCAL_SQL=
+
+    for i in ${databases[@]}
+    do
+        LOCAL_SQL=LOCAL_SQL' USE '$i'; FLUSH TABLES WITH READ LOCK;'
+    done
+
+    LOCAL_SQL=LOCAL_SQL' system ./_activate-master-to-master.sh;'
+
+    for i in ${databases[@]}
+    do
+        LOCAL_SQL=LOCAL_SQL' USE '$i'; UNLOCK TABLES;'
+    done
+fi
+
+