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question asked: Mar 01 '21, 5:44 a.m.
question was seen: 615 times
last updated: Mar 03 '21, 6:54 a.m.

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Maintenance message when servers are down / under maintenance (IHS)

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Ron Janssen (21●4) | asked Mar 01 '21, 5:44 a.m.

 We have a distributed CLM topology where IHS acts as reverse proxy.


Distributed environment, CLM 606.1, iFix014, CM enabled
Server 1: IHS
Server 2: JTS, CCM, GC, LDX, RS
Server 3: RM
Server 4: DCC, RELM
Server 5: LQE

To route the different CLM applications, there are 4 URI-groups in the plugin-cfg.xml.

When would like to have a maintenance message when servers are down / under maintenance.
So normal users are rerouted to a maint.html, and only calls from server or admin users are routed to the CLM apps.

It would even be more ideal when "maintenance mode" would be enabled by the existance of a file "maintenance.lock" or something like that.

Can this be achieved? Any help is welcome.

Ron

Comments
Ron Janssen commented Mar 01 '21, 5:47 a.m.

 On of the reasons is that we need to block users from accessing RM while the backlog is still being processed. 

Ralph Schoon commented Mar 01 '21, 8:59 a.m.
FORUM ADMINISTRATOR / FORUM MODERATOR / JAZZ DEVELOPER

I am not an IHS nor a proxy expert. You would have to check if there is a dynamic redirect option for specific IP's. You could then redirect anything that comes from an IP address that is not one of the servers to the announcement page. 


I remember that a colleague had looked into HAProxy and its capabilities to limit load on a server by strategies such as block or redirect. It might be more configurable than IHS (keep in mind, I barely know IHS and HAProxy only a little bit better).

Ron Janssen commented Mar 03 '21, 2:52 a.m.

Thanks Ralph,


My IHS knowledge is very sparse. I think I need to dig a lot deeper into IHS first.
As IHS is not user aware of course, redirection based on IP can be a useful solution to look at.

Ralph Schoon commented Mar 03 '21, 6:54 a.m.
FORUM ADMINISTRATOR / FORUM MODERATOR / JAZZ DEVELOPER

My approach would be to try to use the knowledge about the IP addresses of the other servers and to redirect everything else.

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