About of your problem of fence: Instead of use a fence by Hardware, you can use a manual fence that come with the cluster software.
Please read this: 1- It not require any hardware. 2- This option isn't advisable in production environments, but useful in development environments. 3- The file used is "fence_ack_manual" 4- It is executed by CLI in a node that is alive for apply the fence to other server. 5- For use it, It is advisable that first disconnect totally the electric power on the server that will be fenced, the goal is to shut down brutally the server that will be fenced before of run the fence command. 6- Finally, execute this command in a node that is alive: Shell# /[PATH]/fence_ack_manual [IP or Name of the Node that will be fenced] 7- Follow the steps as directed by this command. I hope this information is helpful. Best regards Cesar ----- Original Message ----- From: DRBD User To: [email protected] Sent: Tuesday, May 12, 2015 5:39 AM Subject: [DRBD-user] Dual Primary Mode: Shared Directory blocked after node crash until reboot the DRBD status is (regardless of 'nice' shutdown (eg reboot) or 'abrupt' kill (eg pull power plug)) cs:WFConnection ro:Primary/Unknown ds:UpToDate/Outdated but only with a 'nice' shutdown the shared directoy is still accessible... Gesendet: Dienstag, 12. Mai 2015 um 09:44 Uhr Von: Digimer <[email protected]> An: "DRBD User" <[email protected]>, [email protected] Betreff: Re: [DRBD-user] Dual Primary Mode: Shared Directory blocked after node crash until reboot On 12/05/15 03:42 AM, DRBD User wrote: >>>> pacemakers pcs property stonith-enabled is currently set to false > >> Well there's your problem. :) > > Since i don't have any (hardware) STONITH device, i have set stonith-enabled to false. > DRBD's fencing rule is set to : 'fencing: resource-only' > > My goal is: if one node crashes, the other node should take over the work immediately. But actually i have to wait the reboot time of the crashed node. I thought, that in such a situation the active node (rather the shared directory) is immediately usable ? > > May be i should use another fence script ? > > I tried to create the resource with operation 'on-fail=restart' - but no success ... > > Any other suggestions ? You *CAN NOT* safely proceed when a node stops responding _until_ you have put the lost node into a known state. To do otherwise would be to risk a split-brain. A good fence device are switched PDUs, like the APC-brand AP7900 (not all makes/models are supported, so check first before buying other brands). The AP7900 can usually be found used for ~$200 and makes an excellent external fence device. Trying to use DRBD without proper fencing will result in pain and heartache. The delay needed to fence a lost node is FAR preferable to risking a split-brain. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user ------------------------------------------------------------------------------ _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
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