feat: add parameter pg_fs_wal (G) to changing pg_wal dir
#530
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- check_pg_ready - is_patroni_paused - start postgres - start and stop postgres gracefully - patroni pause|resume gracefully
new pg_wal style is `<pg_fs_wal>/<pg_cluster>-<pg_version>/pg_wal` when pg_fs_wal defined pg_fs_wal validatiton: pg_fs_wal must start with '/' and not contain spaces modify pg_wal of current pg_cluster: 1. edit and save pigsty.yml by setting the global `pg_wal` 2. run command `./pgsql.yml -l <cls> -t pg_wal` tested scenarios: - `pig sty install` - pg_fs_wal undefined - pg_fs_wal defined - `bin/pgsql-add pg-a` - pg_fs_wal undefined - pg_fs_wal defined - `./pgsql.yml -t pg_wal` - set pg_fs_wal=/wal - set pg_fs_wal=/wal2 (from /wal) - remove pg_fs_wal (from /wal2) - multiple call `./pgsql.yml -t pg_wal` - keep pg_fs_wal undefined or blank - keep pg_fs_wal=/wal `pg-backup full` will be executed automatically if pg_fs_wal changed and apply this settings: - full installation with valid pg_fs_wal (no backup operation if pg_fs_wal undefined or blank) - pg_fs_wal changed after installation - undefined or empty to `/wal` - `/wal` to `/wal2` - `/wal2` to undefined or empty
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new pg_wal style is
<pg_fs_wal>/<pg_cluster>-<pg_version>/pg_walwhen pg_fs_wal definedpg_fs_wal validatiton: pg_fs_wal must start with '/' and not contain spaces
modify pg_wal of current pg_cluster:
pg_wal./pgsql.yml - <cls> -t pg_waltested scenarios:
pig sty installbin/pgsql-add <pg_cluster>bin/pgsql-add <pg_cluster> <ip>./pgsql.yml -t pg_walafter full installation./pgsql.yml -t pg_walpg-backup fullwill be executed automatically if pg_fs_wal changed and apply this settings:/wal/walto/wal2/wal2to undefined or empty