On 14-07-29 10:34 AM, Joel S. | VOZELIA wrote:
Would you mind sharing that HA control script
/usr/local/bin/bascule_rhcluster.pl?
Yes, please.
This is the very simplistic script I wrote for my own use:
===begin /root/evacuate.sh===
#!/bin/bash
# no sense in re-invoking this, it isn't likely to change while we're
running
H=$(hostname)
# magically declare arrays with () syntax
OTHERNODES=($(pvesh ls /nodes | awk '$NF !~/'$H'/ {print $NF}'))
VMS=($(pvesh ls /nodes/$H/qemu | awk '{print $NF}'))
# Naïve round-robin distribution, not weighted.
i=0
for V in ${VMS[@]}; do
i=$(($i + 1))
pvesh create /nodes/$H/qemu/$V/migrate -target ${OTHERNODES[$(( $i %
${#OTHERNODES[@]} ))]} -force -online
printf '\n'
done
===end===
Not wonderful by any stretch, but it makes my life easier when it's time
to apply updates or do system maintenance. If only I could run multiple
migrations in parallel...
All the complicated-looking substitution in third-last-line is doing is
iterating through $OTHERNODES[] in an evenly-distributed manner. Since I
have 4 identical nodes in the cluster, with more than enough spare
capacity, that approach works for me.
--
-Adam Thompson
[email protected]
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