On Wed, Dec 7, 2016 at 11:42 PM, Guoshuai Li <l...@dtdream.com> wrote:
>
> On 2016/12/8 5:36, Andy Zhou wrote:
>
>
>
> On Tue, Dec 6, 2016 at 9:41 PM, Guoshuai Li <l...@dtdream.com> wrote:
>
>> When the master node's OVNDB process fails, the local node demote to the
>> slave.
>> Failure cause is that the OVNDB process is stop, So the need to re-run
>> the process up.
>> if return $OCF_NOT_RUNNING will not demote the node to slave.
>>
>> Signed-off-by: Guoshuai Li <l...@dtdream.com>
>> ---
>> ovn/utilities/ovndb-servers.ocf | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/ovn/utilities/ovndb-servers.ocf
>> b/ovn/utilities/ovndb-servers.ocf
>> index 1cf6f20..8a64e88 100755
>> --- a/ovn/utilities/ovndb-servers.ocf
>> +++ b/ovn/utilities/ovndb-servers.ocf
>> @@ -283,7 +283,7 @@ ovsdb_server_promote() {
>> ovsdb_server_demote() {
>> ovsdb_server_check_status
>> if [ $? = $OCF_NOT_RUNNING ]; then
>> - return $OCF_NOT_RUNNING
>> + ovsdb_server_start
>>
>
> The logic here looks odd to me. demote() operation should be done against
> running OVNDBs.
>
> Why is OVNDB stopped in the first place? If they are stopped by admin, it
> would be odd that ocf script
> would restart them.
>
>
>
> I agree that demote () should not start OVN-DB.
> But when the OVN-DB process crashes, who might restart it?
>
If OVN-DB crashes, (usually with SIGSEGV segmentation fault), it will be
restarted by the --monitor option.
ovsdb-server deamon does not consider kill -9 (SIGKILL) as crash. It is
rather treated as intentional stop.
>
> I put the master node's OVSDB process with 'kill -9', It does not migrate
> because of depends on VIP.
> but after a long time did not start, and no master node.
>
> * Full list of resources:*
> * Master/Slave Set: ovndb_servers-master [ovndb_servers]*
> * ovndb_servers (ocf::ovn:ovndb-servers): Started ovn2*
> * ovndb_servers (ocf::ovn:ovndb-servers): Started ovn3*
> * ovndb_servers (ocf::ovn:ovndb-servers): **Stopped*
> * Slaves: [ ovn2 ovn3 ]*
> * Stopped: [ ovn1 ]*
> * VirtualIP (ocf::heartbeat:IPaddr2): Started ovn1*
> *Failed Actions:*
> ** ovndb_servers_demote_0 on ovn1 'not running' (7): call=21,
> status=complete, exitreason='none',*
> * last-rc-change='Thu Dec 8 13:41:14 2016', queued=0ms, exec=69ms*
>
> By debugging I found that pacemaker did not call ovsdb_server_start(), it
> call ovsdb_server_demote() and ovsdb_server_stop().
> Who should start it? ovsdb_server_monitor ()? or pacemaker error?
>
>
>
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