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logstash partman recipe huge root partition
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while debugging elasticsearch/logstash today I noticed logstash100[456] carry a very large / which we can use instead for more disk space for elasticsearch

logstash1004:~$ df -hT
Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/md0       ext3      235G  1.8G  221G   1% /
udev           devtmpfs   10M     0   10M   0% /dev
tmpfs          tmpfs      26G  473M   25G   2% /run
tmpfs          tmpfs      64G     0   64G   0% /dev/shm
tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
tmpfs          tmpfs      64G     0   64G   0% /sys/fs/cgroup
/dev/md1       xfs       2.8T  1.6T  1.2T  57% /var/lib/elasticsearch

root can be ~40-50G max if no separate /var is used, meaning ~185G * 4 = 750G more for elasticsearch

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Change 224757 had a related patch set uploaded (by Filippo Giunchedi):
install-server: fix logstash partman recipe

Change 224757 merged by Filippo Giunchedi:
install-server: fix logstash partman recipe

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merged, resolving