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Add MySQL server version dectection and adaptive replica query

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Lorenz Kästle 2025-02-24 19:52:08 +01:00 committed by Lorenz Kästle
parent e0f4dbdf4e
commit 4886fa3deb
1 changed files with 49 additions and 2 deletions
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51
plugins/check_mysql.c
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@ -211,8 +211,55 @@ main (int argc, char **argv)
}
if(check_slave) {
/* check the slave status */
if (mysql_query (&mysql, "show slave status") != 0) {
// Detect which version we are, on older version
// "show slave status" should work, on newer ones
// "show replica status"
// But first we have to find out whether this is
// MySQL or MariaDB since the version numbering scheme
// is different
bool use_deprecated_slave_status = false;
const char *server_version = mysql_get_server_info(&mysql);
unsigned long server_verion_int = mysql_get_server_version(&mysql);
unsigned long major_version = server_verion_int / 10000;
unsigned long minor_version = (server_verion_int % 10000) / 100;
unsigned long patch_version = (server_verion_int % 100);
if (verbose) {
printf("Found MariaDB: %s, main version: %lu, minor version: %lu, patch version: %lu\n", server_version, major_version,
minor_version, patch_version);
}
if (strstr(server_version, "MariaDB") != NULL) {
// Looks like MariaDB, new commands should be available after 10.5.1
if (major_version < 10) {
use_deprecated_slave_status = true;
} else if (major_version == 10) {
if (minor_version < 5) {
use_deprecated_slave_status = true;
} else if (minor_version == 5 && patch_version < 1) {
use_deprecated_slave_status = true;
}
}
} else if (strstr(server_version, "MySQL") != NULL) {
// Looks like MySQL
if (major_version < 8) {
use_deprecated_slave_status = true;
} else if (major_version == 10 && minor_version < 4) {
use_deprecated_slave_status = true;
}
} else {
printf("Not a known sever implementation: %s\n", server_version);
exit(STATE_UNKNOWN);
}
char *replica_query = NULL;
if (use_deprecated_slave_status) {
replica_query = "show slave status";
} else {
replica_query = "show replica status";
}
/* check the replica status */
if (mysql_query(&mysql, replica_query) != 0) {
error = strdup(mysql_error(&mysql));
mysql_close (&mysql);
die (STATE_CRITICAL, _("slave query error: %s\n"), error);