{"id":20418581,"url":"https://github.com/tldr-devops/mariadb-galera","last_synced_at":"2026-02-13T06:20:29.338Z","repository":{"id":133480481,"uuid":"335935609","full_name":"tldr-devops/mariadb-galera","owner":"tldr-devops","description":"Notes about Mariadb Galera setup","archived":false,"fork":false,"pushed_at":"2021-04-09T10:31:59.000Z","size":7,"stargazers_count":4,"open_issues_count":0,"forks_count":0,"subscribers_count":3,"default_branch":"main","last_synced_at":"2025-01-15T14:14:15.709Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Dockerfile","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/tldr-devops.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2021-02-04T11:38:48.000Z","updated_at":"2024-01-13T07:41:04.000Z","dependencies_parsed_at":null,"dependency_job_id":"0fec4ba9-3580-4dcc-916c-94afca663c95","html_url":"https://github.com/tldr-devops/mariadb-galera","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/tldr-devops%2Fmariadb-galera","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/tldr-devops%2Fmariadb-galera/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/tldr-devops%2Fmariadb-galera/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/tldr-devops%2Fmariadb-galera/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/tldr-devops","download_url":"https://codeload.github.com/tldr-devops/mariadb-galera/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":241960883,"owners_count":20049344,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-15T06:33:51.870Z","updated_at":"2026-02-13T06:20:24.298Z","avatar_url":"https://github.com/tldr-devops.png","language":"Dockerfile","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Mariadb Galera\n\nCurrently this just a test setup and info collection\n\nTime spent:\n- 02.02.2021 11:40-00:20\n- 03.02.2021 19:00-19:30 19:40-20:10\n- 04.02.2021 00:00-00:40 17:10-18:30\n- 06.02.2021 17:30-19:30\n- 07.02.2021 16:15-18:15 19:50-21:50\n- 12.02.2021 01:00-02:00 12:40-15:00\n- 17.02.2021 20:50-22:20 22:50-23:50\n- 18.02.2021 00:50-03:20\n\n## monitoring\n```\nSHOW GLOBAL STATUS LIKE 'wsrep%';\n```\n\nImportant\n```\n| wsrep_cluster_size| 1\n| wsrep_cluster_state_uuid| 044c5dd8-694f-11eb-8911-970a826f77a7\n| wsrep_cluster_status| Primary\n| wsrep_connected | ON\n| wsrep_ready | ON\n```\n\n## Fail resistance\n### 1 nodes cluster\nWorks as usual database\n\n### 2 nodes cluster\nOne time I got `Deadlock found when trying to get lock; try restarting transaction` on Primary when Secondary went down.\nOther tries Primary and Secondary instances worked fine when other node was down, and it be able to reconnect to worked instance after shutdow.\n\n### 3 nodes cluster (2 nodes + arbiter)\n- Primary node with arbiter works fine.\nSecondary can reconnect to cluster and get updates after offline.\nSecondary can reconnect to cluster and get updates after being recreated from zero.\n- Primary and Secondary nodes can work without Arbiter.\nArbiter can reconnect to cluster and get updates after being recreated from zero.\n- Primary can work even without Secondary and Arbiter.\nSecondary and Arbiter can reconnect to Primary after being recreated from zero.\n\n# Links\n\n## mariadb galera\n- https://mariadb.com/docs/deploy/community-cluster/\n- https://www.digitalocean.com/community/tutorials/how-to-configure-a-galera-cluster-with-mariadb-on-ubuntu-18-04-servers\n- https://github.com/percona/galera\n\n## Arbitrator\n- https://www.percona.com/doc/percona-xtradb-cluster/LATEST/howtos/garbd_howto.html\n\n## percona xtradb\n- https://severalnines.com/database-blog/overview-percona-xtradb-cluster-kubernetes-operator\n- https://www.percona.com/software/mysql-database/percona-xtradb-cluster\n\n## load balance\n- https://mariadb.com/kb/en/galera-load-balancer/\n- https://jelastic.com/blog/mysql-mariadb-database-auto-clustering-cloud-hosting/\n- https://severalnines.com/database-blog/benchmark-load-balancers-mysqlmariadb-galera-cluster\n- https://github.com/codership/glb/\n- https://mariadb.com/kb/en/mariadb-maxscale-25-about-mariadb-maxscale/\n- https://www.educba.com/mariadb-maxscale/\n- https://proxysql.com/  - require addition setup of user with passwords like in database itself as it works on L7 instead of L3\n\n## docker\n- https://hub.docker.com/_/mariadb/\n- https://hub.docker.com/_/percona/\n- https://hub.docker.com/r/bitnami/mariadb-galera/\n- https://hub.docker.com/r/instantlinux/mariadb-galera\n- https://severalnines.com/database-blog/running-mariadb-galera-cluster-without-container-orchestration-tools-part-one\n\n## k8s\n- https://hub.kubeapps.com/charts/bitnami/mariadb-galera#!\n- https://www.percona.com/resources/webinars/building-kubernetes-operator-percona-xtradb-cluster\n- https://github.com/ids/mariadb-galera-k8s\n- https://github.com/ausov/k8s-mariadb-cluster\n- https://github.com/adfinis-sygroup/mariadb-galera-chart\n- https://severalnines.com/database-blog/running-galera-cluster-kubernetes\n\n## percona xtrabackup\n- https://mariadb.com/kb/en/mariabackup/\n- https://mariadb.com/kb/en/backup-and-restore-overview/\n- https://www.percona.com/software/mysql-database/percona-xtrabackup\n- https://mariadb.com/kb/en/manual-sst-of-galera-cluster-node-with-mariabackup/\n- https://mariadb.com/kb/en/how-mariabackup-works/\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ftldr-devops%2Fmariadb-galera","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ftldr-devops%2Fmariadb-galera","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ftldr-devops%2Fmariadb-galera/lists"}