[libvirt] [PATCH 3/3] rbd: Set timeout options for librados

These timeout values make librados/librbd return -ETIMEDOUT when a operation is blocking due to a failing/unreachable Ceph cluster. By having the operations time out libvirt will not block. --- src/storage/storage_backend_rbd.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/src/storage/storage_backend_rbd.c b/src/storage/storage_backend_rbd.c index 8d1e320..2c97bf4 100644 --- a/src/storage/storage_backend_rbd.c +++ b/src/storage/storage_backend_rbd.c @@ -60,6 +60,9 @@ static int virStorageBackendRBDOpenRADOSConn(virStorageBackendRBDStatePtr ptr, char secretUuid[VIR_UUID_STRING_BUFLEN]; size_t i; char *mon_buff = NULL; + const char *client_mount_timeout = "30"; + const char *mon_op_timeout = "30"; + const char *osd_op_timeout = "30"; VIR_DEBUG("Found Cephx username: %s", pool->def->source.auth.cephx.username); @@ -198,6 +201,20 @@ static int virStorageBackendRBDOpenRADOSConn(virStorageBackendRBDStatePtr ptr, goto cleanup; } + /* + * Set timeout options for librados. + * In case the Ceph cluster is down libvirt won't block forever. + * Operations in librados will return -ETIMEDOUT when the timeout is reached. + */ + VIR_DEBUG("Setting RADOS option client_mount_timeout to %s", client_mount_timeout); + rados_conf_set(ptr->cluster, "client_mount_timeout", client_mount_timeout); + + VIR_DEBUG("Setting RADOS option rados_mon_op_timeout to %s", mon_op_timeout); + rados_conf_set(ptr->cluster, "rados_mon_op_timeout", mon_op_timeout); + + VIR_DEBUG("Setting RADOS option rados_osd_op_timeout to %s", osd_op_timeout); + rados_conf_set(ptr->cluster, "rados_osd_op_timeout", osd_op_timeout); + ptr->starttime = time(0); r = rados_connect(ptr->cluster); if (r < 0) { -- 1.7.9.5