/* Store new weight in real_server struct and then update kernel. */
void
update_svr_wgt(int weight, virtual_server_t * vs, real_server_t * rs
, int update_quorum)
{
if (weight != rs->weight) {
log_message(LOG_INFO, "Changing weight from %d to %d for %s service %s of VS %s"
, rs->weight
, weight
, ISALIVE(rs) ? "active" : "inactive"
, FMT_RS(rs)
, FMT_VS(vs));
rs->weight = weight;
/*
* Have weight change take effect now only if rs is in
* the pool and alive and the quorum is met (or if
* there is no sorry server). If not, it will take
* effect later when it becomes alive.
*/
if (rs->set && ISALIVE(rs) &&
(vs->quorum_state == UP || !vs->s_svr || !ISALIVE(vs->s_svr)))
ipvs_cmd(LVS_CMD_EDIT_DEST, vs, rs);
if (update_quorum)
update_quorum_state(vs);
}
}
/* Store new weight in real_server struct and then update kernel. */
void
update_svr_wgt(int weight, virtual_server * vs, real_server * rs)
{
char rsip[INET6_ADDRSTRLEN];
if (weight != rs->weight) {
log_message(LOG_INFO, "Changing weight from %d to %d for %s service [%s]:%d of VS [%s]:%d"
, rs->weight
, weight
, ISALIVE(rs) ? "active" : "inactive"
, inet_sockaddrtos2(&rs->addr, rsip)
, ntohs(inet_sockaddrport(&rs->addr))
, (vs->vsgname) ? vs->vsgname : inet_sockaddrtos(&vs->addr)
, ntohs(inet_sockaddrport(&vs->addr)));
rs->weight = weight;
/*
* Have weight change take effect now only if rs is in
* the pool and alive and the quorum is met (or if
* there is no sorry server). If not, it will take
* effect later when it becomes alive.
*/
if (rs->set && ISALIVE(rs) &&
(vs->quorum_state == UP || !vs->s_svr || !ISALIVE(vs->s_svr)))
ipvs_cmd(LVS_CMD_EDIT_DEST, check_data->vs_group, vs, rs);
update_quorum_state(vs);
}
}
/* Set a virtualserver IPVS rules */
static int
init_service_vs(virtual_server_t * vs)
{
/* Init the VS root */
if (!ISALIVE(vs) || vs->vsgname) {
if (!ipvs_cmd(LVS_CMD_ADD, vs, NULL))
return 0;
else
SET_ALIVE(vs);
}
/* Processing real server queue */
if (!init_service_rs(vs))
return 0;
if (vs->reloaded) {
if (vs->vsgname)
/* add reloaded dests into new vsg entries */
sync_service_vsg(vs);
/* we may have got/lost quorum due to quorum setting changed */
update_quorum_state(vs);
}
return 1;
}
/* Set a virtualserver IPVS rules */
static int
init_service_vs(virtual_server_t * vs)
{
/* Init the VS root */
if (!ISALIVE(vs) || vs->vsgname) {
if (!ipvs_cmd(LVS_CMD_ADD, check_data->vs_group, vs, NULL))
return 0;
else
SET_ALIVE(vs);
}
/* Processing real server queue */
if (!LIST_ISEMPTY(vs->rs)) {
if (vs->alpha && ! vs->reloaded)
vs->quorum_state = DOWN;
if (!init_service_rs(vs))
return 0;
}
/* if the service was reloaded, we may have got/lost quorum due to quorum setting changed */
if (vs->reloaded)
update_quorum_state(vs);
return 1;
}
/* manipulate add/remove rs according to alive state */
static int
perform_svr_state(int alive, virtual_server_t * vs, real_server_t * rs)
{
/*
* | ISALIVE(rs) | alive | context
* | 0 | 0 | first check failed under alpha mode, unreachable here
* | 0 | 1 | RS went up, add it to the pool
* | 1 | 0 | RS went down, remove it from the pool
* | 1 | 1 | first check succeeded w/o alpha mode, unreachable here
*/
if (!ISALIVE(rs) && alive) {
log_message(LOG_INFO, "%s service %s to VS %s"
, (rs->inhibit) ? "Enabling" : "Adding"
, FMT_RS(rs)
, FMT_VS(vs));
/* Add only if we have quorum or no sorry server */
if (vs->quorum_state == UP || !vs->s_svr || !ISALIVE(vs->s_svr)) {
if (ipvs_cmd(LVS_CMD_ADD_DEST, vs, rs))
return -1;
}
rs->alive = alive;
if (rs->notify_up) {
log_message(LOG_INFO, "Executing [%s] for service %s in VS %s"
, rs->notify_up
, FMT_RS(rs)
, FMT_VS(vs));
notify_exec(rs->notify_up);
}
#ifdef _WITH_SNMP_CHECKER_
check_snmp_rs_trap(rs, vs);
#endif
/* We may have gained quorum */
update_quorum_state(vs);
}
if (ISALIVE(rs) && !alive) {
log_message(LOG_INFO, "%s service %s from VS %s"
, (rs->inhibit) ? "Disabling" : "Removing"
, FMT_RS(rs)
, FMT_VS(vs));
/* server is down, it is removed from the LVS realserver pool
* Remove only if we have quorum or no sorry server
*/
if (vs->quorum_state == UP || !vs->s_svr || !ISALIVE(vs->s_svr)) {
if (ipvs_cmd(LVS_CMD_DEL_DEST, vs, rs))
return -1;
}
rs->alive = alive;
if (rs->notify_down) {
log_message(LOG_INFO, "Executing [%s] for service %s in VS %s"
, rs->notify_down
, FMT_RS(rs)
, FMT_VS(vs));
notify_exec(rs->notify_down);
}
#ifdef _WITH_SNMP_CHECKER_
check_snmp_rs_trap(rs, vs);
#endif
/* We may have lost quorum */
update_quorum_state(vs);
}
return 0;
}
/* manipulate add/remove rs according to alive state */
void
perform_svr_state(int alive, virtual_server * vs, real_server * rs)
{
char rsip[INET6_ADDRSTRLEN];
/*
* | ISALIVE(rs) | alive | context
* | 0 | 0 | first check failed under alpha mode, unreachable here
* | 0 | 1 | RS went up, add it to the pool
* | 1 | 0 | RS went down, remove it from the pool
* | 1 | 1 | first check succeeded w/o alpha mode, unreachable here
*/
if (!ISALIVE(rs) && alive) {
log_message(LOG_INFO, "%s service [%s]:%d to VS [%s]:%d"
, (rs->inhibit) ? "Enabling" : "Adding"
, inet_sockaddrtos2(&rs->addr, rsip)
, ntohs(inet_sockaddrport(&rs->addr))
, (vs->vsgname) ? vs->vsgname : inet_sockaddrtos(&vs->addr)
, ntohs(inet_sockaddrport(&vs->addr)));
/* Add only if we have quorum or no sorry server */
if (vs->quorum_state == UP || !vs->s_svr || !ISALIVE(vs->s_svr)) {
ipvs_cmd(LVS_CMD_ADD_DEST, check_data->vs_group, vs, rs);
}
rs->alive = alive;
if (rs->notify_up) {
log_message(LOG_INFO, "Executing [%s] for service [%s]:%d in VS [%s]:%d"
, rs->notify_up
, inet_sockaddrtos2(&rs->addr, rsip)
, ntohs(inet_sockaddrport(&rs->addr))
, (vs->vsgname) ? vs->vsgname : inet_sockaddrtos(&vs->addr)
, ntohs(inet_sockaddrport(&vs->addr)));
notify_exec(rs->notify_up);
}
/* We may have gained quorum */
update_quorum_state(vs);
}
if (ISALIVE(rs) && !alive) {
log_message(LOG_INFO, "%s service [%s]:%d from VS [%s]:%d"
, (rs->inhibit) ? "Disabling" : "Removing"
, inet_sockaddrtos2(&rs->addr, rsip)
, ntohs(inet_sockaddrport(&rs->addr))
, (vs->vsgname) ? vs->vsgname : inet_sockaddrtos(&vs->addr)
, ntohs(inet_sockaddrport(&vs->addr)));
/* server is down, it is removed from the LVS realserver pool
* Remove only if we have quorum or no sorry server
*/
if (vs->quorum_state == UP || !vs->s_svr || !ISALIVE(vs->s_svr)) {
ipvs_cmd(LVS_CMD_DEL_DEST, check_data->vs_group, vs, rs);
}
rs->alive = alive;
if (rs->notify_down) {
log_message(LOG_INFO, "Executing [%s] for service [%s]:%d in VS [%s]:%d"
, rs->notify_down
, inet_sockaddrtos2(&rs->addr, rsip)
, ntohs(inet_sockaddrport(&rs->addr))
, (vs->vsgname) ? vs->vsgname : inet_sockaddrtos(&vs->addr)
, ntohs(inet_sockaddrport(&vs->addr)));
notify_exec(rs->notify_down);
}
/* We may have lost quorum */
update_quorum_state(vs);
}
}