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services:vpshosts [2017/02/22 20:38] – dgallowayservices:vpshosts [2017/08/15 22:46] (current) – djgalloway
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 ===== Virtual Machines ===== ===== Virtual Machines =====
-Each VPSHOST is home to <del>8</del> 4 virtual machines.  Each VM has its own JBOD disk assigned to it with 4GB RAM and 1 vCPU.+Each VPSHOST is home to <del>8</del> 4 virtual machines.  Each VM has its own JBOD disk assigned to it with 4GB RAM and 1 vCPU **except** the first VM on each VPSHOST.  It runs off the root drive.
  
 In June 2016, we marked down all the even-numbered VPSes and made a change to teuthology which creates the VMs with 4GB RAM as 2GB per VM wasn't meeting the needs.  See http://tracker.ceph.com/issues/15052 In June 2016, we marked down all the even-numbered VPSes and made a change to teuthology which creates the VMs with 4GB RAM as 2GB per VM wasn't meeting the needs.  See http://tracker.ceph.com/issues/15052
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 ==== Setting up a VPSHOST from scratch ==== ==== Setting up a VPSHOST from scratch ====
 **NOTE:** This has been adapted to be applicable for 4 VPSes and disks per host. **NOTE:** This has been adapted to be applicable for 4 VPSes and disks per host.
 +
 +If setting up a host as a new or replacement VPSHOST, be sure to update your libvirt config.  See http://docs.ceph.com/teuthology/docs/downburst_vms.html#vps-hosts.
 +
 +If you install the machine using a ''-stock'' cobbler profile, you'll need to run the common role as well.
  
 <code> <code>
-apt-get install xfsprogs+apt-get install xfsprogs vim
  
 # Determine the first and last VPS number by reading the VPSHOST's description in the lock db # Determine the first and last VPS number by reading the VPSHOST's description in the lock db
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 for disk in sd{b..d}; do mkfs -t xfs -f /dev/$disk; done for disk in sd{b..d}; do mkfs -t xfs -f /dev/$disk; done
  
-# num should be second VPM+## Not really needed if next task and `mount -s` succeeds 
 +# $num should be second VPM
 num=51; for disk in sd{b..d}; do mount /dev/$disk /srv/libvirtpool/vpm0$num; let num=num+2; done num=51; for disk in sd{b..d}; do mount /dev/$disk /srv/libvirtpool/vpm0$num; let num=num+2; done
 # OR if VPM$num is >= 100, # OR if VPM$num is >= 100,
 num=101; for disk in sd{b..d}; do mount /dev/$disk /srv/libvirtpool/vpm$num; let num=num+2; done num=101; for disk in sd{b..d}; do mount /dev/$disk /srv/libvirtpool/vpm$num; let num=num+2; done
  
 +# $num should be second VPM
 num=51; for disk in sd{b..d}; do echo -e "UUID=$(blkid -s UUID -o value /dev/$disk)\t/srv/libvirtpool/vpm0$num\txfs\tdefaults,noatime,nodiratime,nobarrier,inode64,logbufs=8,logbsize=256k,largeio\t0\t0"; let num=num+2; done >> /etc/fstab num=51; for disk in sd{b..d}; do echo -e "UUID=$(blkid -s UUID -o value /dev/$disk)\t/srv/libvirtpool/vpm0$num\txfs\tdefaults,noatime,nodiratime,nobarrier,inode64,logbufs=8,logbsize=256k,largeio\t0\t0"; let num=num+2; done >> /etc/fstab
 # OR if VPM$num is >= 100, # OR if VPM$num is >= 100,
services/vpshosts.1487795932.txt.gz · Last modified: by dgalloway