PMM-14887 Provide a Docker Compose file for community

[ademidoff]

PMM-14887

Link to the Feature Build: SUBMODULES-4291

The PR fixes a panic when the users starts the container with empty parameters, for example: PMM_CLICKHOUSE_ADDR=${PMM_CLICKHOUSE_ADDR:-}. There is a flaw in how managed treats empty variables, being unable to set the default value.

time="2026-04-09T19:00:59.780+00:00" level=warning msg="ClickHouse DB is not reachable [tcp://default:xxxxx@127.0.0.1:9000/pmm]: dial tcp 127.0.0.1:9000: connect: connection refused" component=telemetry
time="2026-04-09T19:00:59.782+00:00" level=info msg="Loading alerting templates from dir=/usr/local/percona/alerting-templates" component=management/alerting
time="2026-04-09T19:00:59.799+00:00" level=info msg="Updating settings..." component=setup
time="2026-04-09T19:00:59.803+00:00" level=info msg=Done. component=main
panic: runtime error: index out of range [1] with length 1

goroutine 1 [running]:
github.com/percona/pmm/managed/services/supervisord.(*Service).marshalConfig(0xc0006aa240, 0xc000069700, 0xc000576d80)
        /home/builder/rpm/BUILD/pmm-60284c9a56a29c76ac19a44936f8e6e1089a5a18/src/github.com/percona/pmm/managed/services/supervisord/supervisord.go:259 +0x1653
github.com/percona/pmm/managed/services/supervisord.(*Service).UpdateConfiguration(0xc0006aa240, 0xc000576d80)
        /home/builder/rpm/BUILD/pmm-60284c9a56a29c76ac19a44936f8e6e1089a5a18/src/github.com/percona/pmm/managed/services/supervisord/supervisord.go:401 +0x474
github.com/percona/pmm/managed/services/server.(*Server).UpdateConfigurations(0xc0005767e0, {0x27b1b88, 0xc00020b1a0})
        /home/builder/rpm/BUILD/pmm-60284c9a56a29c76ac19a44936f8e6e1089a5a18/src/github.com/percona/pmm/managed/services/server/server.go:798 +0xec
github.com/percona/pmm/managed/services/server.(*Server).UpdateSettingsFromEnv(0xc0005767e0, {0x27b1b88, 0xc00020b1a0}, {0xc000053040, 0x19, 0x19})
        /home/builder/rpm/BUILD/pmm-60284c9a56a29c76ac19a44936f8e6e1089a5a18/src/github.com/percona/pmm/managed/services/server/server.go:157 +0x23e
main.setup({0x27b1b88, 0xc00020b1a0}, 0xc0004c8880)
        /home/builder/rpm/BUILD/pmm-60284c9a56a29c76ac19a44936f8e6e1089a5a18/src/github.com/percona/pmm/managed/cmd/pmm-managed/main.go:530 +0x23a

This pull request introduces several improvements and updates to the development and CI/CD environment configuration for PMM Server and related components. The main changes focus on updating container images, enhancing environment variable documentation, and cleaning up or updating workflow and configuration files.

Development and CI/CD environment updates:

• Updated default PMM Server image references to use percona/pmm-server:3 and ghcr.io/percona/pmm:3-dev-container in .env.example and GitHub Actions workflows for consistency and clarity. [1] [2] [3] [4]
• Improved .env.example with detailed comments and organized sections for easier configuration of PMM Server, external databases, SMTP, Watchtower, and development options.

Container image and database version updates:

• Updated MongoDB and PostgreSQL versions in agent/docker-compose.yml to use Percona Server for MongoDB 6.0 (from 5.0) and PostgreSQL 14 (from 11), ensuring the test environment uses more current database versions. [1] [2] [3] [4] [5]
• Added pg_stat_statements extension initialization for PostgreSQL in dev/init-pg.sql.

Workflow and configuration cleanup:

• Removed the spell-check job and its configuration (.typos.toml) from the CI workflow, streamlining the pipeline. [1] [2]
• Minor improvements and typo fixes in documentation and environment variable descriptions for clarity and accuracy. [1] [2] [3] [4]

New and improved development scripts:

• Added MySQL slow query logging configuration (dev/my.cnf), logrotate rules for slow logs (dev/mysql.logrotate), and a new sysbench script for Percona Server (dev/sysbench-ps.sh) to improve local development and testing capabilities. [1] [2] [3]

Other minor changes:

• Updated or removed certain environment variables and public keys in various docker-compose files for better security and maintainability. [1] [2]
• Minor documentation tweaks in README.md for improved clarity.

Let me know if you want to discuss any of these changes in more detail!

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 47.37%. Comparing base (ca3db34) to head (2a678f4).
⚠️ Report is 2 commits behind head on v3.

Files with missing lines	Patch %	Lines
managed/cmd/pmm-managed-init/main.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #5212      +/-   ##
==========================================
- Coverage   47.77%   47.37%   -0.40%     
==========================================
  Files         410      540     +130     
  Lines       41979    44323    +2344     
  Branches        0      584     +584     
==========================================
+ Hits        20054    20998     +944     
- Misses      19949    21281    +1332     
- Partials     1976     2044      +68     

Flag	Coverage Δ
admin	35.80% <ø> (ø)
agent	53.04% <ø> (-0.21%)	⬇️
managed	47.70% <33.33%> (-0.02%)	⬇️
unittests	41.38% <ø> (?)
vmproxy	72.09% <ø> (ø)

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[ademidoff]

Practically no value from this, better use AI, e.g. Copilot reviews.

[maxkondr]

why re-create? just rename to preserve history