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Another try with ha-lizard - by: Adam Ward

October 8, 2016, 3:31 am
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Hi,

Had a weird issue recently where UII turned off my 2 servers and I could not get my iscsi storage back. It was late, I was in deep and had to nuke and install xen with direct attached disks and restore. This shook my confidence in ha-lizard, but after looking around everywhere, there is nothing that can do what it does. So, I am going to try again, but have some questions:

1. In a 2 node pool using noSAN, can I run vm's on both the pool master and the slave? Or should everything run on the pool master and only on the slave in a maintenance / failed server scenario?

2. I have two Netscaler VPX appliances that run in a HA pair (they do not require XenServer or ha-lizard for HA) so I want one to run on the pool master and one to run on the slave, with ha turned off, but using the ha-lizard iscsi storage - is this ok? (There are other windows vm's too that will be protected by ha-lizard ha)

3. Can I apply XenServer patches ( current version, not XenServer version changes) without causing any damage to ha-lizard?

4. What is the correct procedure to shutdown BOTH XenServers in a ha-lizard protected pool? (I had to move the servers on a data centre hence shutdown of both systems)

5. When creating a ha-lizard pool how is the storage created? Eg I have 2 disks in RAID 1+0 for XenServer (sda) and 6 disks in RAID 1+0 per server for the ha-lizard storage (sdb). During XenServer install should I tell. XenServer to only use sdb for virtual machine storage? Or should I not allow XenServer to create any storage and let ha-lizard do this when it's installed?

Sorry for all the questions, I am keen to rebuild this and learn what I did wrong and to make it more robust. I am keen to roll this out using XenServer 7 when offices support is available

Regards,

Adam
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Xenserver 7 BETA Feedback - by: Adam Ward

October 10, 2016, 4:10 am
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Hi,

Am trying out the XenServer 7 beta. I am doing testing, and am attempting to make the Pool Master Storage Secondary and the Slave Storage Primary (to test how I would perform maintenance tasks on the hosts).

I have an error after the actions below:

1.) Turned off ha (ha-cfg status then "yes" to disable)
2.) Put both servers into manual mode (iscsi-cfg manual-mode-enable)
3.) Moved all VM's to slave
4.) demote Master storage (iscsi-cfg become-secondary)

At this point we get a pause for about 10 seconds and then I get the following output:

[root@COR-SVR-C01214 ~]# iscsi-cfg become-secondary
/bin/iscsi-cfg: line 274: 11990 Terminated /etc/iscsi-ha/iscsi-ha.sh become_secondary
###########################################################
# iscsi-ha is in manual mode - current status shown below #
###########################################################
Storage role: Primary (Expected = Secondary)
Replication IP: 10.10.10.1/24
iSCSI target: deactivating (stop-sigterm) (Result: exit-code) since Mon 2016-10-10 12:09:08 BST; 32s ago (Expected = stopped)
/bin/iscsi-cfg: line 31: /etc/iscsi-ha/state/status: Permission denied
[root@COR-SVR-C01214 ~]#


Any help much appreciated.

Regards,

Adam
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install problem - by: szilvagyi

November 5, 2015, 4:56 am
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Dear ,
Successfully installed xen 6.5, follow the youtube video (without bond)
set up network like in video... same ip , with switch so servers can ping each other
when I'm installing i have a problem
...
Parameter name fence_reboot_lone_host not found in xapi database - check your configuration and syntax
Valid configuration parameters are listed above
...

thats error for all parameter...

Whats the problem? need xen 6.2 or bond? or what can i do?
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Performance and CPU load - by: Claudio

October 17, 2016, 8:00 am
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hello,

I'm doing some test using 2 twin server (Dell Poweredge SC1435) with 2 opteron quad core (8 core in total) 2.3/2.7Mhz and a local SSD + 1 mecanical HD

I've seen that storage performance, on master, are 25% slower with HA-Lizard then for normal single xen server, I also seen that when i write on disk 4 (crystal disk test on a Windows VM) CPU-cores go from 40 to 65% of load.

It's normally or it's because the server it's not enought powerfull ?

Thank you in advance for info
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Errors while setting up iscsi-ha - by: Daniel Loxtermann

October 28, 2016, 5:25 am
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Hello there!
I am setting up two Servers with Xenserver 7 in a pool. These two Servers are not identical.
I had to use a partition of a RAID (like sda7) instead of using a whole disk. But these two are exactly the same size (double checked with parted).

Now i set up ha-lizard and ha-iscsi with the noSAN installer. On the Pool-Master this works fine, i can connect the iscsi to the floating ip(10.10.10.3).
On the slave the following error message appears:



isci-ha status on master:


isci-ha status on slave:


oh, and on the slave is message appears in iscsi-ha log:



i already checked if all the config files are equal, deleted lvm cache.
the servers can see each other via the 10.10.10.0 network (both can ping .1, .2 and .3) and are connected directly with 1GB LAN.

Also the drbd initial-sync is really slow. max i get is 10-11MB/s - which would lead to only 100mbits lan, but both cards have negotiated 1000M.
on both servers there is no significant load or device r/w, so i don't get why drbd is so slow...

does anybody have some solution for these issues?
regards
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XenServer 7 iscsi become-secondary issue - by: Adam Ward

November 18, 2016, 2:15 am
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Hi,

Am doing to a load of testing with the latest ha-lizard and ha-iscsi release. I've installed the NoSAN installer 2.1.1

Everything is working, but when I do a iscsi-cfg become-secondary we get an error (see attached output), then the server sits for 1 minute 30 seconds before it acknowledges that it has become secondary.

The error we get is:
[root@MYSERVER1 ~]# iscsi-cfg become-secondary
/usr/bin/iscsi-cfg: line 275: 1557 Terminated /etc/iscsi-ha/iscsi-ha.sh become_secondary

We think we are doing everything correctly; e.g.
Disable HA
Put iscsi into manual mode on BOTH servers
performing iscsi-cfg become-secondary on the PRIMARY server.

Can you tell me if something is wrong, or is this just a warning that can be ignored? I am not seeing any issues when doing this, apart from the warning message and the 1 minute 30 seconds wait.

I have attached the putty output from both servers. SERVER1 is Pool Master, SERVER2 is the Slave.

Many thanks in advance for help.

Adam
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CloudStack + Xenserver + HA-Lizard On 2 NICs - by: Dan

November 22, 2016, 5:19 am
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Hi,

I've been looking for something like HA-Lizard for months and I must say you guys rock!!

Currently, I have 2 Xenservers that I want to uses as hosts for a CloudStack install. Of course, I want to use the storage on those hosts as primary storage in CloudStack (2 TB per host).

My issue is that I only have 2 NICs per server and HA-Lizard requires those 2 NICs (my webhost will not add any more).

CloudStack can use one NIC (or bonded NICs) for all traffic (management, public, storage, etc.) So my question for HA-Lizard is, must the 2 bonded NICs required for the setup be dedicated specifically to the storage network or can they be used to send other type of traffic?

Ideally, separating the networks would be best but my webhost pricing is unbeatable. Otherwise, I would need to find a webhost that offers 4 NICs, which most likely would be more expensive, which would amount to the same as keeping the current host and adding storage separately, in which case I wouldn't need HA-Lizard (I know, it's crazy)

Any input on this would certainly be appreciated.

Thanks
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HA Lizard without automatic power-on machines - by: David Ramirez

December 1, 2016, 11:25 pm
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Hi. I have little question.

I used HA lizar with xen7. I'm very happy But I see one detail.

I hace a SAI program to can shutdown server correctly. But with ha-lizard if a VM will be down.. It's power on again in another server o similar server.

And. In this case xen never poweroff and servers don't make a gracefull shutdown.

How can I enable ha-lizard. But VM must pe power on-off manually

Thanks
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Problem Converting Local Storage to iSCSI - by: tyh-chris

December 5, 2016, 9:16 am
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Hi,

I have to XenServer 7.0 hosts in a pool. I've been following the youtube video on how to install HA-Lizard, but run into a problem when I get to the storage conversion part.

Firstly, the local storage isn't detected, so I have to enter the path manually. Not too much of a problem, but then it says "Exclusive open failed." and I cannot convert it.

The local storage is a 4 x 1TB RAID10 volume on an HP Smart Array P410i, using Ext3.

I'm trying to install version 2.1.0 of HA-Lizard. Any help appreciated.

Thanks
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No LUN in iSCSI Target - by: tyh-chris

December 6, 2016, 3:45 am
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Hi,

I've installed HA-Lizard 2.1.0 on two XenServer 7.0 hosts. There was a problem where both installations couldn't get exclusive access to the local storage, but installation seemed to proceed regardless.

I've got to the stage where I have to add the iSCSI SR, but although I can select the target IQN on IP 10.10.10.3, there are no LUNs available to select. I guess they were never created in the first place. Everything else seems to be running as it should.

Please help, I feel like I am so close to getting this up and running!
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HA-Lizard with external san storage (shared) - by: mluthfim

December 8, 2016, 4:28 pm
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Dear All,

I would like to know, is ha-lizard can support external san storage?
My current test, consist of 2 servers as the xen hosts and san storage for the VMs running. I dont use iscsi-ha.

is it possible to build Xenserver HA+HAlizard with current environment?

I really appreciate any help you can provide.
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ha-cfg commands not working after slave fenced - by: Andrew Foster

December 12, 2016, 4:57 am
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Hi there,
We have set up a 2 node pool with XenServer 7.0 and the recommended version of the noSAN auto-installer. All working well until we started testing fail scenarios.

Unplugged management network from slave host. Slave fenced itself (POOL mode) and rebooted. VMs running on slave started up again automatically on master.

The slave host is now back up with network restored. DRBD did not start automatically. Slave does appear to have re-entered the pool automatically and logs look normal.

Running "ha-cfg get" on master now returns no output. Running it on slave is OK.

Any ideas what went wrong with DRBD, and how I can now return "ha-cfg get" functionality to my master?

This is the output of ha-cfg get on slave:

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Xenserver 7 support? - by: Sean Nelson

June 28, 2016, 8:05 am
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Is Xenserver 7 supported by HA-Lizard? I'm about to try it in a test environment, but would like to know if it would be appropriate for a production environment.
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Best Way to Test HA? - by: tyh-chris

December 16, 2016, 2:21 am
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Hi,

I've finally got HA-Lizard 2.1.0 installed correctly on my 2-node XenServer 7.0 pool. I've transferred my VMs to the new HA iSCSI volume, I've set global_vm_ha to 0 and have specified which of my VMs I'd like to have high availability.

What is the best way to emulate a scenario where my primary server fails?
Could I just pull the ethernet cables at the back?
What would be the procedure to get it back online afterwards?

Thanks
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HA Lizard without automatic power-on machines - by: David Ramirez

December 1, 2016, 11:25 pm
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Hi. I have little question.

I used HA lizar with xen7. I'm very happy But I see one detail.

I hace a SAI program to can shutdown server correctly. But with ha-lizard if a VM will be down.. It's power on again in another server o similar server.

And. In this case xen never poweroff and servers don't make a gracefull shutdown.

How can I enable ha-lizard. But VM must pe power on-off manually

Thanks
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nike air presto black - by: HaleJohn

December 25, 2016, 10:58 pm
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adidas nmd uk - by: HaleJohn

December 25, 2016, 11:01 pm
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Adding a second iSCSI SR for VMs/Backups - by: Alexander Hjelm

December 26, 2016, 7:06 am
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Hi, i did use your HA noSan installer and it did work great with xenserver 7, tested like everything now and i want to add 1TB drive on each server in iSCSI that syncs like my main VM drive.

How can i do this in an easy way? i did this in the guide when i installed noSan HA-lizard but is there an easy way to add my drives and make them sync without running the wizard?
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Auto installer based on video problem - by: Zack Miller

January 2, 2017, 1:07 pm
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Following install video, at the point of installing via the downloaded auto installer have permission denied, terminal output is as follows:

[root@XenServer1 tmp]# ./halizard_nosan_installer_2.1.3
bash: ./halizard_nosan_installer_2.1.3: Permission denied

Installing on XenServer 7.0 (build 7.0.1.3852)

Any help would be greatly appreciated
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Code Contributions? - by: ETS

January 3, 2017, 11:43 pm
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Is there anything like a 'GitHub' repository to send pull requests to and for discussing code improvements/changes besides this forum?
Where should one send untested/unapproved code contributions, ideas, etc. to for this great project?
How is it done the 'official' way?
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