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"standby clone": add --recovery-conf-only option

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This will generate "recovery.conf" for an existing standby.

Typical use-case is a standby cloned manually from an external data
source (e.g. Barman), where "recovery.conf" needs to be created
(and if required a replication slot).

The --dry-run option will check the pre-requisites but not actually
create "recovery.conf" or a replication slot.

This requires that the upstream node is running, a replication connection
can be made and if required a replication slot can be created.

Implements GitHub #382.
This commit is contained in:
Ian Barwick
2018-02-21 14:37:01 +09:00
parent 22b3a74fa0
commit ee98a3a58e
5 changed files with 424 additions and 25 deletions
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3
dbutils.c
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@@ -3486,6 +3486,9 @@ create_replication_slot(PGconn *conn, char *slot_name, int server_version_num, P
PGresult *res = NULL;
t_replication_slot slot_info = T_REPLICATION_SLOT_INITIALIZER;
if (server_version_num == UNKNOWN_SERVER_VERSION_NUM)
server_version_num = get_server_version(conn, NULL);
/*
* Check whether slot exists already; if it exists and is active, that
* means another active standby is using it, which creates an error