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Questions tagged [ganeti]

Ganeti is a management tool for clusters of virtual machines.

It takes advantage of open source software like the Xen and KVM hypervisors to provide management capabilities for clusters of virtual machines spread across physical machines.

21 questions
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4 answers

Ganeti vs Proxmox

I'm system administrator in small software house. I'm going to virtualise our servers. The main reason for doing this is providing highest possible uptime, but probably it will also increase resources utilization. We have two servers. On one we have…
Maciek Sawicki
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6
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1 answer

Ganeti master IP and cluster name

I'm trying to set up a ganeti cluster. My problem is that I don't understand the role of the "cluster name" and the associated "master IP". The installation requirement is that every node and future instance must have a resolvable host name, and the…
netom
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4
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1 answer

Ganeti and automatic failover

I'm building a simple 2-node cluster with Ganeti+DRBD... What is the recommended way to setup automatic failover? I'm used to Heartbeat, but they say it should be avoided with my setup.
Joril
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4
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2 answers

Ganeti KVM settings

When I have played with KVM using libvirtd/virsh, I disabled section in libvirt's xml configs for VMs an this gives me CPU usage from 7-8% in idle mode per VM to 1-2% for windows guests. This was a great advantage. But how to apply such trick when…
Stan
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3
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1 answer

Ganeti disks degraded drbd cs:NetworkFailure

I have an instance (with 2disks) on Ganeti with both disks degraded (probably due to a connection problem?). This instance was working correctly for many years until this morning. On my master $ gnt-instance info myinstance ... -disk/0 on…
dalf
  • 173
3
votes
1 answer

ganeti network: change bridge name

I try to add an instance to network, first first I need to connect the network to a bridge. I'm using bridge vbr0 instead of standard xen-br0, gnt-cluster info shows that ganeti has the default set properly. # gnt-network list Network Subnet …
neutrinus
  • 1,155
3
votes
2 answers

Ganeti : Installing Centos/RHEL Instance

I have installed Ganeti on Centos 6.3 with DRBD and have added couple of nodes. However, now I am facing next challenge of installing a Centos Guest/Instance on top of it. I tried using ganeti-instance-image but it does not appear to have ISO…
chandank
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2 answers

How Ganeti deals with Fencing

I found out that proxmox doc says a lot abou Fencing. I haven't found anything about it in Ganeti doc. Also I screeched Ganeti Google Group Archive and I found similar question but answer was that Split Brain is not a problem in Ganeti and…
Maciek Sawicki
  • 800
2
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0 answers

Mount Raid 5 to Ganeti VM

I am running a one node Ganeti Server Supermicro MBD-X10SDV-6C+-TLN4F-O with Intel Xeon D-1528 and 32 GB Ram I have the following setup: OS Ubuntu 16.04.2 2X 250GB SSD's in Raid 1 -> ext4 partition for OS and LVM for Instances 3X 1TB WD Red in Raid…
Max
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2
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2 answers

ganeti-metad bind address based on cluster configuration

On my machine (debian jessie) ganeti-metad listens on all interfaces: # netstat -lepn | grep metad tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 0 66528 32831/ganeti-metad unix 2 [ ACC ] …
neutrinus
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2
votes
1 answer

Start a script on ganeti node after instance is started or migrated

There is a ganeti cluster. Is there any way to run script on ganeti node after some instance is start running on that node? In both situations - starting from scratch, and migrating live from another host. It's possible to do it "automated"…
undefine
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2
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1 answer

converting Ganeti instance to vmdk fails

I have exported an instance from ganeti using this command : gnt-backup export -n I get these files: /srv/ganeti/export/win2k8.itlao.local# ls 6dac4bb5-19e9-4917-8233-39cecfbe0e39.disk0_data.snap config.ini When I try to convert for VMWARE using…
user206397
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2
votes
1 answer

How can I run the same command on all Ganeti nodes?

When administering a Ganeti cluster, it is important to maintain one of the main assumptions Ganeti does: all nodes (at least inside the same group) are equal. How can I run the same command on the entire cluster? Full disclosure: I am being paid to…
badp
  • 165
2
votes
2 answers

Ganeti 'template' based OS, possible?

Just discovering ganeti and playing around; from what I saw it's only possible to create instances by 'de-bootstrapping' a flavour of OS. I'm wondering if it's possible to have 'ready to go' templates like for example a 'LAMP' template or a 'DNS…
Disco
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1
vote
1 answer

Ganeti command to find out how many more instances of a particular type fit into the cluster

I've once used a ganeti command to get the maximum number of instances of a particular type that fit into the cluster. Like this: gnt-something how-many-more INSTANCE_TYPE I was going through the manual and checked the man pages of all gnt commands…
hek2mgl
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