Merge pull request 'db: refs #8140 - add new script to change server rol' (!82) from 8140_feat_promote_and_demote into main
Reviewed-on: #82 Reviewed-by: Juan Ferrer <juan@verdnatura.es>
This commit is contained in:
commit
391707701f
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@ -29,8 +29,7 @@ required_mariabackup_files_and_scripts:
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- { src: scripts/check-memory.sh, dest: /root/scripts/check-memory.sh, mode: u=rwx,g=rx,o=rx }
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- { src: scripts/export-privs.sh, dest: /root/scripts/export-privs.sh, mode: u=rwx,g=rx,o=rx }
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- { src: scripts/mysqltuner.pl, dest: /root/scripts/mysqltuner.pl, mode: u=rwx,g=rx,o=rx }
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- { src: scripts/events-promote.sh, dest: /root/scripts/events-promote.sh, mode: u=rwx,g=rx,o=rx }
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- { src: scripts/events-demote.sh, dest: /root/scripts/events-demote.sh, mode: u=rwx,g=rx,o=rx }
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- { src: scripts/role-change.sh, dest: /root/scripts/role-change.sh, mode: u=rwx,g=rx,o=rx }
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- { src: scripts/README.md, dest: /root/scripts/README.md, mode: u=rw,g=r,o=r }
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- { src: scripts/scheduler-log.sh, dest: /root/scripts/scheduler-log.sh, mode: u=rwx,g=rx,o=rx }
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configuration_files:
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@ -45,3 +44,8 @@ downloads:
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- url: https://repo.percona.com/apt/percona-release_latest.generic_all.deb
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dest: /tmp/percona-release_latest.generic_all.deb
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mode: u=rw,g=r,o=r
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clean_config_and_scripts:
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- { path: /root/scripts/events-promote.sh }
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- { path: /root/scripts/events-demote.sh }
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- { path: /root/scripts/promote-master.sh }
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- { path: /root/scripts/promote-slave.sh }
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@ -1,16 +0,0 @@
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#!/bin/bash
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mysql -e "SET GLOBAL event_scheduler = OFF"
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echo "SELECT db, name FROM mysql.event WHERE status = 'ENABLED'" | mysql --raw --silent | \
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awk '{
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gsub("`", "``", $1);
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gsub("`", "``", $2);
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print "`"$1"`.`"$2"`";
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}' | \
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while read event; do
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mysql -e "ALTER EVENT $event DISABLE ON SLAVE"
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done
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mysql -e "SET GLOBAL event_scheduler = ON"
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@ -1,15 +0,0 @@
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#!/bin/bash
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mysql -e "SET GLOBAL event_scheduler = OFF"
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echo "SELECT db, name FROM mysql.event WHERE status = 'SLAVESIDE_DISABLED'" | mysql --raw --silent | \
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awk '{
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gsub("`", "``", $1);
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gsub("`", "``", $2);
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print "`"$1"`.`"$2"`";
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}' | \
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while read event; do
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mysql -e "ALTER EVENT $event ENABLE"
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done
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mysql -e "SET GLOBAL event_scheduler = ON"
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@ -0,0 +1,123 @@
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#!/bin/bash
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# Script to manage MariaDB events during replication role changes.
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#
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# Author: Xavi Lleó & GhatGPT ®
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# Copyright (c) 2025 Verdnatura S.L. All rights reserved.
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# Version: 1.4.0
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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# Description:
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# This script toggles MariaDB events during replication role changes.
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# It supports three modes:
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# --promote : Re-enable events previously marked SLAVESIDE_DISABLED
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# --demote : Disable currently ENABLED events using DISABLE ON SLAVE
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# --status : Display current status of all events
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# All actions are logged to /var/log/mariadb_admin.log.
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set -euo pipefail
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LOG_FILE="/var/log/mariadb_admin.log"
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TIMESTAMP="$(date '+%F %T')"
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log() {
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echo "$TIMESTAMP - $1" | tee -a "$LOG_FILE"
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}
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disable_scheduler() {
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log "Disabling event_scheduler..."
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if mysql -e "SET GLOBAL event_scheduler = OFF"; then
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log "Successfully disabled event_scheduler"
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else
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log "ERROR: Failed to disable event_scheduler"
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exit 1
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fi
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}
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enable_scheduler() {
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log "Re-enabling event_scheduler..."
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if mysql -e "SET GLOBAL event_scheduler = ON"; then
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log "Successfully re-enabled event_scheduler"
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else
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log "ERROR: Failed to re-enable event_scheduler"
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exit 1
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fi
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}
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final_status() {
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log "Final event_scheduler status:"
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mysql --table -e "SHOW VARIABLES LIKE 'event_scheduler';" | tee -a "$LOG_FILE"
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log "Final state of all events:"
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mysql --table -e "SELECT db, name, status FROM mysql.event;" | tee -a "$LOG_FILE"
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}
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if [[ $# -ne 1 ]]; then
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echo "Usage: $0 --promote | --demote | --status"
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exit 1
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fi
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MODE="$1"
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case "$MODE" in
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--status)
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log "Fetching current event_scheduler status:"
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mysql --table -e "SHOW VARIABLES LIKE 'event_scheduler';" | tee -a "$LOG_FILE"
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log "Fetching current event status:"
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mysql --table -e "SELECT db, name, status FROM mysql.event;" | tee -a "$LOG_FILE"
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;;
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--promote)
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disable_scheduler
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log "Promoting: Enabling events with SLAVESIDE_DISABLED status..."
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mysql --raw --silent -e "SELECT db, name FROM mysql.event WHERE status = 'SLAVESIDE_DISABLED'" | \
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awk '{ gsub("`", "``", $1); gsub("`", "``", $2); print "`"$1"`.`"$2"`" }' | \
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while read -r event; do
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if mysql -e "ALTER EVENT $event ENABLE"; then
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log "Enabled event: $event"
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else
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log "ERROR: Failed to enable event: $event"
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fi
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done
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enable_scheduler
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final_status
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;;
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--demote)
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disable_scheduler
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log "Demoting: Disabling events currently ENABLED..."
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mysql --raw --silent -e "SELECT db, name FROM mysql.event WHERE status = 'ENABLED'" | \
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awk '{ gsub("`", "``", $1); gsub("`", "``", $2); print "`"$1"`.`"$2"`" }' | \
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while read -r event; do
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if mysql -e "ALTER EVENT $event DISABLE ON SLAVE"; then
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log "Disabled event: $event"
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else
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log "ERROR: Failed to disable event: $event"
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fi
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done
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enable_scheduler
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final_status
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;;
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*)
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echo "Invalid mode: $MODE"
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echo "Usage: $0 --promote | --demote | --status"
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exit 1
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;;
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esac
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@ -122,3 +122,9 @@
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- name: Mount all filesystems from /etc/fstab
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command: mount -a
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when: fstab.changed
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- name: Clean old configs or scripts
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file:
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path: "{{ item.path }}"
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state: absent
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loop: "{{ clean_config_and_scripts }}"
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