[Pacemaker] DRBD promotion timeout after pacemaker stop on other node

[Andrew Beekhof]

On 12 Nov 2013, at 10:29 am, Andrew Beekhof <andrew at beekhof.net> wrote:

> 
> On 12 Nov 2013, at 2:46 am, Vladislav Bogdanov <bubble at hoster-ok.com> wrote:
> 
>> 11.11.2013 09:00, Vladislav Bogdanov wrote:
>> ...
>>>>>> Looking at crm-fence-peer.sh script, it would determine peer state as
>>>>>> offline immediately if node state (all of)
>>>>>> * doesn't contain "expected" tag or has it set to "down"
>>>>>> * has "in_ccm" tag set to false
>>>>>> * has "crmd" tag set to anything except "online"
>>>>>> 
>>>>>> On the other hand, crmd sets "expected" = "down" only after fencing is
>>>>>> complete (probably the same for "in_ccm"?). Shouldn't is do the same (or
>>>>>> may be just remove that tag) if clean shutdown about to be complete?
>>>>> 
>>>>> That would make sense.  Are you using the plugin, cman or corosync 2?
>>> 
>> 
>> This one works in all tests I was able to imagine, but I'm not sure it is
>> completely safe to set expected="down" for old DC (in test when drbd is promoted on DC and it reboots).
>> 
>> From ddfccc8a40cfece5c29d61f44a4467954d5c5da8 Mon Sep 17 00:00:00 2001
>> From: Vladislav Bogdanov <bubble at hoster-ok.com>
>> Date: Mon, 11 Nov 2013 14:32:48 +0000
>> Subject: [PATCH] Update node values in cib on clean shutdown
>> 
>> ---
>> crmd/callbacks.c  |    6 +++++-
>> crmd/membership.c |    2 +-
>> 2 files changed, 6 insertions(+), 2 deletions(-)
>> 
>> diff --git a/crmd/callbacks.c b/crmd/callbacks.c
>> index 3dae17b..9cfb973 100644
>> --- a/crmd/callbacks.c
>> +++ b/crmd/callbacks.c
>> @@ -162,6 +162,8 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
>>            } else if (safe_str_eq(node->uname, fsa_our_dc) && crm_is_peer_active(node) == FALSE) {
>>                /* Did the DC leave us? */
>>                crm_notice("Our peer on the DC (%s) is dead", fsa_our_dc);
>> +                /* FIXME: is it safe? */
> 
> Not at all safe.  It will prevent fencing.
> 
>> +                crm_update_peer_expected(__FUNCTION__, node, CRMD_JOINSTATE_DOWN);
>>                register_fsa_input(C_CRMD_STATUS_CALLBACK, I_ELECTION, NULL);
>>            }
>>            break;
>> @@ -169,6 +171,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
>> 
>>    if (AM_I_DC) {
>>        xmlNode *update = NULL;
>> +        int flags = node_update_peer;
>>        gboolean alive = crm_is_peer_active(node);
>>        crm_action_t *down = match_down_event(0, node->uuid, NULL, appeared);
>> 
>> @@ -199,6 +202,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
>> 
>>                crm_update_peer_join(__FUNCTION__, node, crm_join_none);
>>                crm_update_peer_expected(__FUNCTION__, node, CRMD_JOINSTATE_DOWN);
>> +                flags |= node_update_cluster | node_update_join | node_update_expected;
> 
> This does look ok though

With the exception of 'node_update_cluster'.  
That didn't change here and shouldn't be touched until it really does leave the membership.

> 
>>                check_join_state(fsa_state, __FUNCTION__);
>> 
>>                update_graph(transition_graph, down);
>> @@ -221,7 +225,7 @@ peer_update_callback(enum crm_status_type type, crm_node_t * node, const void *d
>>            crm_trace("Other %p", down);
>>        }
>> 
>> -        update = do_update_node_cib(node, node_update_peer, NULL, __FUNCTION__);
>> +        update = do_update_node_cib(node, flags, NULL, __FUNCTION__);
>>        fsa_cib_anon_update(XML_CIB_TAG_STATUS, update,
>>                            cib_scope_local | cib_quorum_override | cib_can_create);
>>        free_xml(update);
>> diff --git a/crmd/membership.c b/crmd/membership.c
>> index be1863a..d68b3aa 100644
>> --- a/crmd/membership.c
>> +++ b/crmd/membership.c
>> @@ -152,7 +152,7 @@ do_update_node_cib(crm_node_t * node, int flags, xmlNode * parent, const char *s
>>    crm_xml_add(node_state, XML_ATTR_UNAME, node->uname);
>> 
>>    if (flags & node_update_cluster) {
>> -        if (safe_str_eq(node->state, CRM_NODE_ACTIVE)) {
>> +        if (crm_is_peer_active(node)) {
> 
> This is also wrong.  XML_NODE_IN_CLUSTER is purely a record of whether the node is in the current corosync/cman/heartbeat membership.
> 
>>            value = XML_BOOLEAN_YES;
>>        } else if (node->state) {
>>            value = XML_BOOLEAN_NO;
>> -- 
>> 1.7.1
>> 
>> 
>> 
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>> 
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