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votequorum: add wait_for_all support (default: off)

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this flag (0|1) can be configured via quorum.wait_for_all and changes
behavior when granting quorum for the first time.

Normal behavior (default / 0) grants quorum as soon as enough nodes
are available in a cluster.

Setting this value to 1 will grant quorum only after all cluster
memembers are part of the cluster at the same time.

Reviewed-by: Steven Dake <sdake@redhat.com>
Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
This commit is contained in:
Fabio M. Di Nitto 2012-01-03 11:06:39 +01:00
parent b64d1b8694
commit e8d0af0bc8
2 changed files with 21 additions and 0 deletions
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1
exec/coroparse.c
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@ -368,6 +368,7 @@ static int main_config_parser_cb(const char *path,
if ((strcmp(path, "quorum.disallowed") == 0) ||
(strcmp(path, "quorum.two_node") == 0) ||
(strcmp(path, "quorum.wait_for_all") == 0) ||
(strcmp(path, "quorum.quorate") == 0)) {
i = atoi(value);
icmap_set_uint8(path, i);

20
services/votequorum.c
View File

@ -124,6 +124,7 @@ static int cluster_is_quorate;
static int first_trans = 1;
static unsigned int quorumdev_poll = DEFAULT_QDEV_POLL;
static unsigned int leaving_timeout = DEFAULT_LEAVE_TMO;
static uint8_t wait_for_all = 0;
static struct cluster_node *us;
static struct cluster_node *quorum_device = NULL;
@ -385,6 +386,8 @@ static void votequorum_init(struct corosync_api_v1 *api,
ENTER();
set_quorum = report;
icmap_get_uint8("quorum.wait_for_all", &wait_for_all);
/* Load the library-servicing part of this module */
api->service_link_and_init(api, "corosync_votequorum_iface", 0);
@ -608,6 +611,23 @@ static void set_quorate(int total_votes)
int quorate;
ENTER();
/*
* wait for all nodes to show up before granting quorum
*/
if (wait_for_all) {
if (total_votes != us->expected_votes) {
log_printf(LOGSYS_LEVEL_NOTICE,
"Waiting for all cluster members. "
"Current votes: %d expected_votes: %d\n",
total_votes, us->expected_votes);
cluster_is_quorate = 0;
return;
}
wait_for_all = 0;
}
if (quorum > total_votes) {
quorate = 0;
}