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Add docker support (#11)
* first commit for docker support * organizing files for use with docker * script changes for docker compatibility * reducing manual actions * final adjustments * update readme
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‎.gitignore

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.env
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logs/

‎Dockerfile

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FROM ubuntu:22.04
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# repo for x86_64
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ARG ZABBIX_REPOSITORY=https://repo.zabbix.com/zabbix/6.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_6.0-4+ubuntu22.04_all.deb
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# repo for arm64
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#ARG ZABBIX_REPOSITORY=https://repo.zabbix.com/zabbix/6.0/ubuntu-arm64/pool/main/z/zabbix-release/zabbix-release_6.0-5+ubuntu22.04_all.deb
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RUN apt-get update \
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&& DEBIAN_FRONTEND=noninteractive apt-get install -y libdatetime-perl liblogger-syslog-perl libdbd-mysql-perl libdbi-perl curl tzdata \
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&& curl -LO ${ZABBIX_REPOSITORY} \
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&& dpkg -i zabbix-release*.deb && rm -f zabbix-release*.deb \
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&& apt-get update && apt-get install -y zabbix-sender \
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&& rm -rf /var/lib/apt/lists/* \
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&& useradd -r -u 999 zabbix
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COPY ./docker-entrypoint.sh /usr/local/bin/
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COPY ./mysql_zbx_part.pl /usr/local/bin/
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COPY ./docker/zabbix_exec_db_partitioning.sh /usr/local/bin/
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RUN sed -i 's~my $is_container = 0;~my $is_container = 1;~g' /usr/local/bin/mysql_zbx_part.pl \
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&& chmod 755 /usr/local/bin/mysql_zbx_part.pl \
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/usr/local/bin/zabbix_exec_db_partitioning.sh \
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/usr/local/bin/docker-entrypoint.sh
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USER zabbix
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ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]

‎README.md

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@@ -29,6 +29,26 @@ https://blog.zabbix.com/partitioning-a-zabbix-mysql-database/13531/
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Or check out our Zabbix book for a detailed description:
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https://www.amazon.com/Zabbix-Infrastructure-Monitoring-Cookbook-maintaining-dp-1801078327/dp/1801078327
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MAKE SURE TO UNCOMMENT THE CORRECT LINES FOR THE VERSION YOU NEED. Check the blog post for more information.
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```
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# MySQL 5.5
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# MySQL 5.6 + MariaDB
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# MySQL 8.x (NOT MariaDB!)
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```
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Uncomment the following line for Zabbix 5.4 and OLDER:
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```
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# $dbh->do("DELETE FROM auditlog_details WHERE NOT EXISTS (SELECT NULL FROM auditlog WHERE auditlog.auditid = auditlog_details.auditid)");
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```
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Comment the following line for Zabbix 6.4 and OLDER:
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```
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'history_bin' => { 'period' => 'day', 'keep_history' => '60'},
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```
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[Run directly on your server](#run-directly-on-your-server) or [run in a Docker container](#run-in-a-docker-container).
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### Run directly on your server
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Place the script in (create the folder if it doesn't exist):
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```
@@ -83,33 +103,77 @@ On a Debian based systems (like Ubuntu) run:
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apt-get install libdatetime-perl liblogger-syslog-perl libdbd-mysql-perl
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```
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MAKE SURE TO UNCOMMENT THE CORRECT LINES FOR THE VERSION YOU NEED. Check the blog post for more information.
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That's it! You are now done and you have setup MySQL partitioning. We could execute the script manually with:
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```
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# MySQL 5.5
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# MySQL 5.6 + MariaDB
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# MySQL 8.x (NOT MariaDB!)
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perl /usr/share/zabbix/mysql_zbx_part.pl
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```
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Uncomment the following line for Zabbix 5.4 and OLDER:
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Then we can check and see if it worked with:
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```
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# $dbh->do("DELETE FROM auditlog_details WHERE NOT EXISTS (SELECT NULL FROM auditlog WHERE auditlog.auditid = auditlog_details.auditid)");
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journalctl -t mysql_zbx_part
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```
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Comment the following line for Zabbix 6.4 and OLDER:
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### Run in a Docker container
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#1 Assuming you are in the root directory of this Git repository.
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Edit the Dockerfile and uncomment the `ZABBIX_REPOSITORY` argument line according to your Docker host architecture (x86_64 or arm64), then build the Docker image:
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```
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'history_bin' => { 'period' => 'day', 'keep_history' => '60'},
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docker build -t zabbix-db-partitioning .
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```
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That's it! You are now done and you have setup MySQL partitioning. We could execute the script manually with:
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Create log directory. This folder will be mounted as a volume in the container, thus persisting the logs for future reference.
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```
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perl /usr/lib/zabbix/mysql_zbx_part.pl
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mkdir logs
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sudo chgrp 999 logs/
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chmod 775 logs/
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```
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Then we can check and see if it worked with:
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Create the `.env` file based on the [template](docker/.env.example) and edit it as per your environment.
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```
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journalctl -t mysql_zbx_part
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cp docker/.env.example .env
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sudo chown root: .env
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sudo chmod 400 .env
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```
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The command below runs the container to perform the partitioning tasks and, when the perl script finishes executing, the container is automatically stopped and deleted.
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```
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sudo docker run --rm \
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--name zabbix-db-partitioning \
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-v ./logs:/logs \
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--env-file ./.env \
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zabbix-db-partitioning
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```
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After running the container, you can check the logs:
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```
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cat logs/mysql_zbx_part.log
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```
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Edit `root` user crontab:
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```
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crontab -e
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```
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Add the line in the crontab, adjusting the schedule. Change `project_dir` to the root directory of this Git repository on your file system.
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```
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55 22 * * * docker run --rm --name zabbix-db-partitioning -v /project_dir/logs:/logs --env-file /project_dir/.env zabbix-db-partitioning
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```
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To monitor Perl script execution:
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- Import the [zbx_mysql_partitioning_template.yaml](docker/zbx_mysql_partitioning_template.yaml) template into your Zabbix;
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- Add the template to an existing host or create a new host;
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- Uncomment and configure the `zabbix_sender` variables in the `.env` file;
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With that the container will send the result of executing the Perl script to your Zabbix and a trigger will be fired if an error occurs or if the script has not been executed in the last 2 days.
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### Partitioning by week
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NOTE: See version 2.1 for older (before 20-09-2021) partitioned databases. Otherwise use 3.0+ upwards (recommended to use current).
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‎docker-entrypoint.sh

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#!/bin/bash
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set -e
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if [[ -n "${LOG_PATH}" ]]; then
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/usr/local/bin/zabbix_exec_db_partitioning.sh >> $LOG_PATH 2>&1
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else
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echo "LOG_PATH environment variable is missing. Exiting..."
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exit 1
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fi

‎docker/.env.example

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# log file path inside the container
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LOG_PATH=/logs/mysql_zbx_part.log
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# timezone
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TZ=Etc/UTC
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# mysql connection settings
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DB_HOST=your_db_host
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DB_PORT=3306
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DB_DATABASE=your_database_name
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DB_USER=your_database_user
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DB_PASSWORD=your_password
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# zabbix_sender settings
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#ZABBIX_SERVER=yourserver.address
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#ZABBIX_HOST=Your host name
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#ZABBIX_ITEM_KEY=zabbix.db.partitioning

‎docker/README.md

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# Zabbix MySQL partitioning Perl script - Docker
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Follow the instructions in the [main README](../README.md).

‎docker/zabbix_exec_db_partitioning.sh

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#!/bin/bash
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echo -e "\n$(date '+%Y-%m-%d %H:%M') - Starting script execution..."
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# Runs the table partitioning script and sends Zabbix the value 1 (success) or 0 (fail).
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/usr/local/bin/mysql_zbx_part.pl \
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&& ITEM_VALUE=1 \
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|| ITEM_VALUE=0
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if [[ -n "${ZABBIX_SERVER}" ]]; then
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/usr/bin/zabbix_sender -z $ZABBIX_SERVER -s "$ZABBIX_HOST" -k "$ZABBIX_ITEM_KEY" -o $ITEM_VALUE
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fi

‎docker/zbx_mysql_partitioning_template.yaml

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zabbix_export:
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version: '6.0'
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date: '2023-05-20T04:16:07Z'
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groups:
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-
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uuid: f95e6745d71947769f0bc3576f009fcc
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name: Templates/Databases/MySQL Partitioning
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templates:
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-
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uuid: 951111adbeab4e91a61b50c7b5fcbca8
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template: 'Zabbix database partitioning'
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name: 'Zabbix database partitioning'
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description: 'Checks if the script that performs the daily maintenance of the partitions of the "history" and "trends" tables in the MySQL database of Zabbix is being executed.'
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groups:
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-
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name: Templates/Databases/MySQL Partitioning
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items:
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-
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uuid: 531df4426c094f11a9c42680113243aa
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name: 'Partitioning script execution state'
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type: TRAP
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key: zabbix.db.partitioning
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delay: '0'
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valuemap:
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name: 'Script execution state'
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tags:
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-
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tag: component
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value: database
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triggers:
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-
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uuid: c2af3acc3748476c8dd48447e3c1b996
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expression: |
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last(/Zabbix database partitioning/zabbix.db.partitioning)<>1
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or
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nodata(/Zabbix database partitioning/zabbix.db.partitioning,50h,"strict")=1
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name: 'Database tables partitioning script was not executed'
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priority: AVERAGE
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description: 'This means that, if not fixed, new partitions will not be created and Zabbix may stop logging metrics due to lack of partitions. See problem information in the partitioning script log.'
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tags:
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-
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tag: scope
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value: capacity
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valuemaps:
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-
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uuid: 8d55537d35014da58ecc3572805f16d0
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name: 'Script execution state'
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mappings:
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-
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value: '1'
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newvalue: Executed
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-
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value: '0'
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newvalue: 'Not executed'

‎mysql_zbx_part.pl

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#!/usr/bin/perl
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use strict;
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use DBI;
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use Sys::Syslog qw(:standard :macros);
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use DateTime;
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openlog("mysql_zbx_part", "ndelay,pid", LOG_LOCAL0);
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# the Dockerfile will change the value to 1 in the container build process
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my $is_container = 0;
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# initializing some variables
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my $db_schema;
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my $db_host;
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my $db_port;
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my $dsn;
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my $db_user_name;
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my $db_password;
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my $curr_tz;
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if ($is_container) {
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# check if environment variables exists
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if (not defined $ENV{'DB_HOST'}
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or not defined $ENV{'DB_PORT'}
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or not defined $ENV{'DB_DATABASE'}
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or not defined $ENV{'DB_USER'}
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or not defined $ENV{'DB_PASSWORD'}
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or not defined $ENV{'LOG_PATH'}
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or not defined $ENV{'TZ'}
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) {
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print "Environment variables are missing! Exiting...\n";
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exit 1;
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}
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# open log file
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open( OUTPUT, ">>", $ENV{'LOG_PATH'} ) or die $!;
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# do not manually modify the next 7 lines, they are only used when the script is run in a container
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$db_schema = $ENV{'DB_DATABASE'};
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$db_host = $ENV{'DB_HOST'};
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$db_port = $ENV{'DB_PORT'};
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$dsn = 'DBI:mysql:'.$db_schema.':host='.$db_host.';port='.$db_port;
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$db_user_name = $ENV{'DB_USER'};
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$db_password = $ENV{'DB_PASSWORD'};
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$curr_tz = $ENV{'TZ'};
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}
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else {
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use Sys::Syslog qw(:standard :macros);
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openlog("mysql_zbx_part", "ndelay,pid", LOG_LOCAL0);
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# edit next 5 lines if the script is run directly in your server
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$db_schema = 'zabbix';
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$dsn = 'DBI:mysql:'.$db_schema.':mysql_socket=/var/lib/mysql/mysql.sock';
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$db_user_name = 'zabbix';
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$db_password = 'password';
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$curr_tz = 'Etc/UTC';
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}
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my $db_schema = 'zabbix';
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my $dsn = 'DBI:mysql:'.$db_schema.':mysql_socket=/var/lib/mysql/mysql.sock';
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my $db_user_name = 'zabbix';
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my $db_password = 'password';
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my $tables = { 'history' => { 'period' => 'day', 'keep_history' => '60'},
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'history_log' => { 'period' => 'day', 'keep_history' => '60'},
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'history_str' => { 'period' => 'day', 'keep_history' => '60'},
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};
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my $amount_partitions = 10;
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34-
my $curr_tz = 'Etc/UTC';
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# name templates for the different periods
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my $partition_name_templates = { 'day' => 'p%Y_%m_%d',
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'week' => 'p%Y_w%W',
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4685
unless ( check_have_partition() ) {
4786
print "Your installation of MySQL does not support table partitioning.\n";
48-
syslog(LOG_CRIT, 'Your installation of MySQL does not support table partitioning.');
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log_writer('Your installation of MySQL does not support table partitioning.', LOG_CRIT);
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exit 1;
5089
}
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66105
foreach my $key (sort keys %{$tables}) {
67106
unless (defined($part_tables->{$key})) {
68-
syslog(LOG_ERR, 'Partitioning for "'.$key.'" is not found! The table might be not partitioned.');
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log_writer('Partitioning for "'.$key.'" is not found! The table might be not partitioned.', LOG_ERR);
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next;
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}
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100139
# my $sth = $dbh->prepare(qq{select version();});
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# $sth->execute();
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# my $row = $sth->fetchrow_array();
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# $sth->finish();
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# return 1 if $row >= 8;
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#
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118157
my $next_name = name_next_part($period, $curr_part);
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120159
if (grep { $_ eq $next_name } keys %{$table_part}) {
121-
syslog(LOG_INFO, "Next partition for $table_name table has already been created. It is $next_name");
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log_writer("Next partition for $table_name table has already been created. It is $next_name", LOG_INFO);
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}
123162
else {
124-
syslog(LOG_INFO, "Creating a partition for $table_name table ($next_name)");
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log_writer("Creating a partition for $table_name table ($next_name)", LOG_INFO);
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my $query = 'ALTER TABLE '."$db_schema.$table_name".' ADD PARTITION (PARTITION '.$next_name.
126165
' VALUES less than (UNIX_TIMESTAMP("'.date_next_part($period, $curr_part).'") div 1))';
127-
syslog(LOG_DEBUG, $query);
166+
log_writer($query, LOG_DEBUG);
128167
$dbh->do($query);
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}
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}
@@ -143,11 +182,11 @@ sub remove_old_partitions {
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144183
foreach my $partition (sort keys %{$table_part}) {
145184
if ($table_part->{$partition}->{'partition_description'} <= $curr_date->epoch) {
146-
syslog(LOG_INFO, "Removing old $partition partition from $table_name table");
185+
log_writer("Removing old $partition partition from $table_name table", LOG_INFO);
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148187
my $query = "ALTER TABLE $db_schema.$table_name DROP PARTITION $partition";
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150-
syslog(LOG_DEBUG, $query);
189+
log_writer($query, LOG_DEBUG);
151190
$dbh->do($query);
152191
}
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}
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187226
# Uncomment the following line for Zabbix 5.4 and earlier
188227
# $dbh->do("DELETE FROM auditlog_details WHERE NOT EXISTS (SELECT NULL FROM auditlog WHERE auditlog.auditid = auditlog_details.auditid)");
189228
}
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230+
sub log_writer {
231+
my $log_line = shift;
232+
233+
if ($is_container) {
234+
print OUTPUT $log_line . "\n";
235+
}
236+
else {
237+
my $log_priority = shift;
238+
syslog($log_priority, $log_line);
239+
}
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}

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