Details
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Bug
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Status: Done
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Critical
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Resolution: Fixed
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2.27.0, 2.28.0
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Debian 11
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2
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Yes
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Yes
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C/S Core
Description
User impact:
pmm-agent.log is cluttered with 'Unknown column...' errors when MariaDB from Debian package (10.2, 10.3, 10.4, 10.5) is added to monitoring
STR:
Install PMM Server and Client
Add MariaDB to PMM
docker run --name mariadb10.4 -e MYSQL_ROOT_PASSWORD=pass -p 3309:3306 -p 33062:33060 -d mariadb:10.4 --performance-schema=1 pmm-admin add mysql --username=root --password=pass --query-source=perfschema mariadb10.4 127.0.0.1:3309
Check pmm-agent.log
Result:
ERRO[2021-06-03T13:25:06.059+00:00] failed to query events_statements_summary_by_digest: Error 1054: Unknown column 'performance_schema.events_statements_summary_by_digest.QUERY_SAMPLE_TEXT' in 'field list' agentID=/agent_id/bb5efe0c-12b1-4d65-a137-213f44fb18ed component=agent-builtin type=qan_mysql_perfschema_agent ERRO[2021-06-03T13:25:11.059+00:00] failed to query events_statements_summary_by_digest: Error 1054: Unknown column 'performance_schema.events_statements_summary_by_digest.QUERY_SAMPLE_TEXT' in 'field list' agentID=/agent_id/bb5efe0c-12b1-4d65-a137-213f44fb18ed component=agent-builtin type=qan_mysql_perfschema_agent ERRO[2021-06-03T13:25:16.059+00:00] failed to query events_statements_summary_by_digest: Error 1054: Unknown column 'performance_schema.events_statements_summary_by_digest.QUERY_SAMPLE_TEXT' in 'field list' agentID=/agent_id/bb5efe0c-12b1-4d65-a137-213f44fb18ed component=agent-builtin type=qan_mysql_perfschema_agent ERRO[2021-06-03T13:25:21.059+00:00] failed to query events_statements_summary_by_digest: Error 1054: Unknown column 'performance_schema.events_statements_summary_by_digest.QUERY_SAMPLE_TEXT' in 'field list' agentID=/agent_id/bb5efe0c-12b1-4d65-a137-213f44fb18ed component=agent-builtin type=qan_mysql_perfschema_agent
How to test.
Scenario: Adding a MariaDB instance from a Debian distro, using Performance Schema as the source for QAN
When: Add a MariaDB instance from a Debian distro using performance_schema as the query source for QAN
Then: The proper query should be executed to get queries from perf_schema
And: In the pmm-agent log there shouldn't be any errors like this:
Error 1054: Unknown column 'performance_schema.events_statements_summary_by_digest.QUERY_SAMPLE_TEXT'
How to test example
1. Start PMM server.
2. Start a MariaDB instance from a Debian distribution.
For my tests I started a Debian docker container and then manually installed MariaDB inside it.
3. Get your local IP address to use it when adding the MariaDB instance to PMM
(hostname -I | awk '{print $1}'
4. Config pmm-admin inside the pmm-server docker container.
docker exec pmm-server pmm-admin config --server-insecure-tls --server-url=https://admin:[email protected]:443
5. Add the MariaDB instance
docker exec pmm-server pmm-admin add mysql --host <IP from step 3> --port 3306 --username=root --password=root --service-name=maria102 --query-source=perfschema
6. Check there are no errors in the log (the output should be empty).
docker exec pmm-server cat /srv/logs/pmm-agent.log | grep -i QUERY_SAMPLE_TEXT
Solution:
Check if vendor is Debian, and the version string has mariadb, set vendor as mariadb
case strings.Contains(strings.ToLower(ven), "debian") && strings.Contains(strings.ToLower(ver), "mariadb"): vendor = "mariadb"
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