Amazon EC2 centos 6竞价型实例根卷

Question

The issue I have is that the root volume on centos AMIs seems to be set to 8GB regardless of what it says in the management console.

There are many posts online regarding re-partitioning and rebooting, though the instances need to be provisioned with Ansible and be available as spot instances.

NAME    MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvde    202:64   0  40G  0 disk 
└─xvde1 202:65   0   8G  0 part /

Is there a way to reconfigure without rebooting or starting the instance with the correct partition?

[root@ip-172-XX-XX-70 ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/xvde1      7.9G  797M  6.7G  11% /
tmpfs            15G     0   15G   0% /dev/shm


[root@ip-172-XX-XX-70 ~]# resize2fs /dev/xvde1
resize2fs 1.41.12 (17-May-2010)  
The filesystem is already 2096896 blocks long.  Nothing to do!

Many thanks

Answer 1

I'm no Linux partition expert but there are a couple of possible workarounds I would use.

1) create a custom ami, to do this launch an instance in the normal way, correct the partition size, take a snapshot. You can then use this AMI instead of the CentOS one you're currently using (also helpful if you want to do things like pre install programs) it does mean you'd still be stuck with a static partition size, depends on your use case if that's an issue.

2) use an official AMI, I dont have the full list, or what exactly it is that makes them different but you'll find certain official AMIs, amazon Linux, rhel, windows off the top of my head automatically start with the corrected disk size, if you can move to amazon Linux for example which I believe is a very close fork of centos (at a guess), problem solved.

Good Luck