paspo/docker-mariadb-backup-slave
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added healthcheck
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This commit is contained in:
Paolo Asperti 2019-11-24 17:33:44 +01:00
parent 9663e150c3
commit fd3e93421d
Signed by: paspo
GPG Key ID: 06D46905D19D5182
3 changed files with 34 additions and 5 deletions
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Dockerfile
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FROM mariadb:10
RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -q -y cron sudo automysqlbackup
RUN apt-get update && \
DEBIAN_FRONTEND=noninteractive apt-get install -q -y cron sudo automysqlbackup
COPY mysql.cnf /etc/mysql/mariadb.conf.d/settings.cnf
RUN chown mysql:mysql /etc/mysql/mariadb.conf.d/settings.cnf
COPY docker-entrypoint.sh /usr/local/bin/
COPY healthcheck.sh /usr/local/bin/
COPY automysqlbackup /etc/default
COPY sudoers /etc/sudoers.d/mysudoers
#HEALTHCHECK
HEALTHCHECK CMD /usr/local/bin/healthcheck.sh

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README.md
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[![Build Status](https://drone.asperti.com/api/badges/paspo/docker-mariadb-backup-slave/status.svg)](https://drone.asperti.com/paspo/docker-mariadb-backup-slave)
# docker-mariadb-backup-slave
Setup a mariadb slave server with automysqlbackup
## Parameters
### SERVER_ID
This is used to customize slave server ID. The default value is 33. You should use an unique ID for each server.
### READONLY
When set to **1**, the slave server is set as readonly. This is the default. If you set this variable to something different, the database will be read/write.
### REPLICATE_DO_DB
This is used to specify a single database to backup. It is generally advised to set this variable to the database name you want to backup.
$ docker exec some-mariadb sh -c 'exec mysqldump --all-databases -uroot -p"$MYSQL_ROOT_PASSWORD"' > /some/path/on/your/host/all-databases.sql
2019-11-24 10:57:24 0 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--log-basename=#' or '--relay-log=mysqld-relay-bin' to avoid this problem.

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healthcheck.sh Executable file
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#!/bin/bash
RES=$(mysql -uroot -p"$MYSQL_ROOT_PASSWORD" -e 'SHOW SLAVE STATUS\G' | egrep '(Slave_IO_Running|Slave_SQL_Running):' | awk -F: '{print $2}' | tr '\n' ',')
if [ "$RES" = " Yes, Yes," ]; then
exit 0
fi
exit 1