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ff3f6732e9d89a877ed20cdd6159a1b625726837
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13 Commits
Author SHA1 Message Date
wan ff3f6732e9 010: fix verification - compare pg_settings raw values, not SHOW output 
SHOW() pretty-renders units (60s -> '1min'), which broke the post-up
check after a successful apply. Compare pg_settings.setting (base-unit
raw values) instead - rendering-proof.
 2026-08-31 22:24:38 +09:00
wan 08c585d048 013: PgBouncer transaction pooling on localhost:6432 
Serverless clients -> many short connections, few TPS. pool_mode=
transaction, max_client_conn=300, default_pool_size=20 (+reserve 5)
matching max_connections=30. max_prepared_statements=200 for ORM
prepared statements. localhost-only until remote-access migration
(roadmap 015). README table + notes updated.
 2026-08-31 22:21:53 +09:00
wan 04068a49e3 012: cap parallelism and disable jit for shared 2 vCPU 
max_parallel_workers_per_gather=1, max_parallel_workers=2, jit=off.
All reloadable - no restart.
 2026-08-31 22:21:53 +09:00
wan ba1b6a4393 011: observability - pg_stat_statements, slow-log, io timing 
preload pg_stat_statements (+extension in iwanhae/postgres DBs),
log_min_duration_statement=500ms, track_io_timing=on.
 2026-08-31 22:21:53 +09:00
wan e7cfa261c8 010: memory & stability tuning for 1GB e2-micro 
max_connections 100->30, effective_cache_size 768MB, statement_timeout
30s, idle_in_transaction_session_timeout 60s, temp_file_limit 2GB via
conf.d drop-in; restart only when max_connections changes.
 2026-08-31 22:21:53 +09:00
wan 84d6f9724c status: fix false DRIFT for non-root invocations 
- runner: export sbin-inclusive PATH (util-linux tools live in /usr/sbin)
- 001: read /proc/swaps instead of swapon(8)
- 005: resolve /dev/disk/by-uuid symlink instead of findfs(8); report ?
  (exit 2) when the UUID cannot be resolved
 2026-08-31 16:48:06 +09:00
wan 5d1f641c61 add per-migration status case (read-only drift check), integrate into sysmig status 
status convention: print one line, exit 0 OK / 1 DRIFT / 2 unknown (e.g.
needs root). sysmig status now shows [applied ✓/✗/?] per migration and
exits 1 on drift. DB checks fall back to peer auth when non-root.
 2026-08-31 16:46:21 +09:00
wan 4c21cccae3 008: personal database iwanhae owned by admin role 2026-08-31 16:31:53 +09:00
wan 29e87149eb 007: iwanhae OS user as PostgreSQL superuser via peer auth 2026-08-31 16:28:40 +09:00
wan 78c8e79726 006: PostgreSQL 18 from official PGDG repo instead of Debian's PG 17 
Per https://www.postgresql.org/download/linux/debian/ (manual configuration):
GPG key + deb822 sources (codename-pgdg) + postgresql-18. Skip-check now
requires an 18 cluster. Down also removes the PGDG repo.
 2026-08-31 16:22:10 +09:00
wan f7a387e821 006: fix disk check - findmnt -T (containing fs), not exact mountpoint 2026-08-31 16:13:30 +09:00
wan 873d254009 005/006: mount /dev/sdb at /var/lib/postgresql + install PostgreSQL 17 on it 2026-08-31 16:11:37 +09:00
wan f69cb99b3f sysmig: migration runner + initial 4 migrations (swap, daemon trims) 
- up/down/status interface, history in /var/lib/sysmig/applied
- 001 swap 2GB + swappiness=10, 002-004 trim unneeded daemons (~56MB)
- google-osconfig-agent intentionally kept
- all messages/comments in ASCII English (console font safety)
 2026-08-31 15:49:01 +09:00