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MQSeries.net Forum IndexClusteringBalancing/HA with QM aliases

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eniomarques
PostPosted: Fri Aug 10, 2018 8:31 am Post subject: Balancing/HA with QM aliases Reply with quote

Novice

Joined: 25 May 2015
Posts: 21
Location: Brazil

Hello everyone!

I'm trying to find a solution to avoid a possible point of failure.


Currently, we have two QMs that act as a gateway to a partner, and these two QMs are part of a cluster.

This partner, have several QM aliases that uses the xmitq of only one of our gateway QMs, and the idea would be to have them use both, case something goes wrong with one of our gateways.

Is there any way to make it work? I was thinking about using a namelist (not sure if it would work, have not tested yet), but I believe that even with a namelist, if one of the QMs goes down, the messages will still end up in its xmitq.

Thanks!
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exerk
PostPosted: Fri Aug 10, 2018 9:25 am Post subject: Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 5899

1. Put MQ IPT in front of both queue managers, with an internal route defined for each (one route active, one dormant, i.e. shut down);

2. Use the same queue manager alias in both your gateways (this alias will be the symbolic queue manager name you give to your partner - if you want to maintain your current set-up, you will only need an alias in the other gateway);

3. If gateway 'Active' queue manager goes down, de-activate the 'active' IPT route and activate the 'dormant' route.

You may have to amend SSLPEER values if you use SSL pass-through in IPT, and reset channel sequence numbers, but this set-up would give you what you want. Undoubtedly others will be along to offer alternatives.
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eniomarques
PostPosted: Tue Aug 14, 2018 10:37 am Post subject: Reply with quote

Novice

Joined: 25 May 2015
Posts: 21
Location: Brazil

exerk wrote:
1. Put MQ IPT in front of both queue managers, with an internal route defined for each (one route active, one dormant, i.e. shut down);

2. Use the same queue manager alias in both your gateways (this alias will be the symbolic queue manager name you give to your partner - if you want to maintain your current set-up, you will only need an alias in the other gateway);

3. If gateway 'Active' queue manager goes down, de-activate the 'active' IPT route and activate the 'dormant' route.

You may have to amend SSLPEER values if you use SSL pass-through in IPT, and reset channel sequence numbers, but this set-up would give you what you want. Undoubtedly others will be along to offer alternatives.


Thank you, looks like that's all we need! Not sure if we will be able to implement it though. I'll let you know
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