Mysql Aiops

Disclaimer: Community-maintained open-source project. Not affiliated with, endorsed by, or sponsored by Oracle Corporation or the MariaDB Foundation. "MySQL" is a trademark of Oracle Corporation; "MariaDB" is a trademark of MariaDB plc; all product/trademark names belong to their respective owners. MIT licensed.

Governed AI-ops for MySQL 8.x and MariaDB 10.6+ DBA operations — connecting to a server with PyMySQL and reading information_schema / performance_schema — with a built-in governance harness: unified audit log, token/runaway budget guard, undo-token recording, and descriptive risk-tier labels. The server flavor (mysql vs mariadb) is detected from version() and flavor-dependent statements branch automatically (SHOW REPLICA STATUS vs SHOW SLAVE STATUS).

What it does

Four flagship signature analyses, plus the guarded reads and writes around them:

• Slow-query RCA — take the worst events_statements_summary_by_digest entry (plus an optional EXPLAIN FORMAT=JSON plan) and map its numbers — no-index share (SUM_NO_INDEX_USED), lock-time share, rows-examined/sent ratio, tmp-disk spill, call count, plan access types — to a cited cause and a concrete action. Every finding carries its measured number, not a black-box verdict.
• InnoDB lock-wait & deadlock chain RCA — build the wait-for tree from performance_schema.data_lock_waits (MariaDB: information_schema.innodb_lock_waits), name the root blocker (blocks others, waits on none), and parse the last deadlock out of SHOW ENGINE INNODB STATUS.
• Replication lag RCA — map the replica's IO/SQL thread state, Seconds_Behind_Source and error fields to a cited cause + action (stopped IO thread, failed applier statement, lagging applier, intentional SQL_Delay).
• Table fragmentation analysis — rank tables by reclaimable data_free from information_schema.tables into cited OPTIMIZE TABLE candidates.

What works

• CLI (mysql-aiops ...): init, overview, server, activity, query, index, table, repl, analyze, remediate, secret, doctor, mcp.
• MCP server (mysql-aiops mcp or mysql-aiops-mcp): 35 tools (26 read, 9 write), every one wrapped with the bundled @governed_tool harness.
• Encrypted credentials: the account password lives in an encrypted store ~/.mysql-aiops/secrets.enc (Fernet + scrypt) — never plaintext on disk. Unlock with a master password from MYSQL_AIOPS_MASTER_PASSWORD (MCP/CI) or an interactive prompt (CLI).
• Reversibility: mutating writes fetch the real before-state first and record a faithful inverse — create_index↔drop_index; drop_index captures the index definition out of SHOW CREATE TABLE so undo recreates it exactly; set_global_variable captures the prior value from SHOW GLOBAL VARIABLES so undo sets it back. Irreversible ops (kill_session, kill_query, optimize_table, analyze_table, reset_query_stats) record prior state for audit but declare no undo.
• Safety: every state-changing CLI op supports --dry-run and requires double confirmation; every write MCP tool takes a dry_run preview. All identifiers that cannot be parameterised (schema/table/index/column/variable names) are validated against a strict charset and backtick-quoted; all values are bound query parameters.

What this tool does, and does not, decide

It delivers MySQL / MariaDB DBA operations — reads and writes — accurately and efficiently, and records every one of them. It does not decide whether a write is allowed to happen. That is the agent's judgement, or the permission of the account you connect it with: point it at a MySQL/MariaDB account granted only SELECT / PROCESS / REPLICATION CLIENT and no write privileges (no INSERT/UPDATE/DELETE/DDL), and the writes fail at the server — the place that actually owns the permission.