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standby switchover: fetch remote repmgr version number

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This commit is contained in:
Ian Barwick
2020-03-04 14:35:19 +09:00
parent 8f6058c676
commit 63aac64938
1 changed files with 60 additions and 2 deletions
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62
repmgr-action-standby.c
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@@ -3430,6 +3430,7 @@ do_standby_switchover(void)
char remote_host[MAXLEN] = "";
int remote_node_id = UNKNOWN_NODE_ID;
t_node_info remote_node_record = T_NODE_INFO_INITIALIZER;
int remote_repmgr_version = UNKNOWN_REPMGR_VERSION_NUM;
RecordStatus record_status = RECORD_NOT_FOUND;
RecoveryType recovery_type = RECTYPE_UNKNOWN;
@@ -3781,7 +3782,12 @@ do_standby_switchover(void)
initPQExpBuffer(&remote_command_str);
make_remote_repmgr_path(&remote_command_str, &remote_node_record);
appendPQExpBufferStr(&remote_command_str, "--version 2>/dev/null && echo \"1\" || echo \"0\"");
/*
* Here we're executing an arbitrary repmgr command which is guaranteed to
* succeed if repmgr is executed. We'll extract the actual version number in the
* next step.
*/
appendPQExpBufferStr(&remote_command_str, "--version >/dev/null 2>&1 && echo \"1\" || echo \"0\"");
initPQExpBuffer(&command_output);
command_success = remote_command(remote_host,
runtime_options.remote_user,
@@ -3827,8 +3833,57 @@ do_standby_switchover(void)
exit(ERR_BAD_CONFIG);
}
termPQExpBuffer(&command_output);
/*
* Now we're sure the binary can be executed, fetch its version number.
*/
initPQExpBuffer(&remote_command_str);
make_remote_repmgr_path(&remote_command_str, &remote_node_record);
appendPQExpBufferStr(&remote_command_str, "--version 2>/dev/null");
initPQExpBuffer(&command_output);
command_success = remote_command(remote_host,
runtime_options.remote_user,
remote_command_str.data,
config_file_options.ssh_options,
&command_output);
termPQExpBuffer(&remote_command_str);
if (command_success == true)
{
remote_repmgr_version = parse_repmgr_version(command_output.data);
if (remote_repmgr_version == UNKNOWN_REPMGR_VERSION_NUM)
{
log_error(_("unable to parse \"%s\"'s reported version on \"%s\""),
progname(), remote_host);
PQfinish(remote_conn);
PQfinish(local_conn);
exit(ERR_BAD_CONFIG);
}
log_debug(_("\"%s\" version on \"%s\" is %i"),
progname(), remote_host, remote_repmgr_version );
}
else
{
log_error(_("unable to execute \"%s\" on \"%s\""),
progname(), remote_host);
if (strlen(command_output.data) > 2)
log_detail("%s", command_output.data);
termPQExpBuffer(&command_output);
PQfinish(remote_conn);
PQfinish(local_conn);
exit(ERR_BAD_CONFIG);
}
termPQExpBuffer(&command_output);
/*
* Check if the expected remote repmgr.conf file exists
@@ -3939,9 +3994,12 @@ do_standby_switchover(void)
* correct user, otherwise the node will probably not be able to attach to
* the promotion candidate (and is a sign of bad configuration anyway) so we
* will complain vocally.
*
* We'll only do this if we've determined the remote repmgr binary is new
* enough to have the "node check --replication-config-owner" option.
*/
if (PQserverVersion(local_conn) >= 120000)
if (PQserverVersion(local_conn) >= 120000 && remote_repmgr_version >= 50100)
{
initPQExpBuffer(&remote_command_str);
make_remote_repmgr_path(&remote_command_str, &remote_node_record);