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System VMs not starting with CentOS 7 hosts #7794
Description
ISSUE TYPE
- Bug Report
- Improvement Request
- Enhancement Request
- Feature Idea
- Documentation Report
- Other
COMPONENT NAME
System VMs, KVM
CLOUDSTACK VERSION
4.18, main
CONFIGURATION
OS / ENVIRONMENT
SUMMARY
Tried creating a new environment with CentOS 7 and Systems VMs failed to start with the below error
2023-07-31 11:15:56,455 INFO [c.c.v.VirtualMachineManagerImpl] (Work-Job-Executor-55:ctx-2c1e5436 job-2/job-582 ctx-5d943e87) (logid:8d9e353e) Unable to start VM on Host {"id":1,"name":"pr7769-t7215-kvm-centos7-kvm1","type":"Routing","uuid":"d12436b0-8fb1-46ad-85c0-582f786fe180"} due to unsupported configuration: deflate-on-oom is not supported by this QEMU binary
-> rpm -qa |grep qemu
qemu-img-1.5.3-175.el7_9.6.x86_64
qemu-kvm-1.5.3-175.el7_9.6.x86_64
qemu-kvm-common-1.5.3-175.el7_9.6.x86_64
libvirt-daemon-driver-qemu-4.5.0-36.el7_9.5.x86_64
This PR #7663 adds new hot memory ballooning capabilities, may be we need version checks there.
STEPS TO REPRODUCE
EXPECTED RESULTS
System VMs should come up and running
ACTUAL RESULTS
System VMs start attempt failed
Activity
kiranchavala commentedon Aug 1, 2023
Observing the same issue, Able to reproduce the issue
@DaanHoogland @rajujith
DaanHoogland commentedon Aug 1, 2023
@kiranchavala @harikrishna-patnala , I am investigating the issue. We don't set
deflate-on-oomexplicitely on the xml defenition. We do set a memballoon attributeautodeflate, so I am trying to see if I can manipulate that in our favour. Will update here.weizhouapache commentedon Aug 2, 2023
@DaanHoogland
any update ?
DaanHoogland commentedon Aug 2, 2023
I have tried removing the autodeflate option but that did not work on centos7. I am investigating further but have little options left, other than reverting #7663. Trying that one now.
weizhouapache commentedon Aug 2, 2023
Thanks @DaanHoogland
if you need any sugg, please let me know
yadvr commentedon Aug 3, 2023
One way to address https://github.com/apache/cloudstack/pull/7663/files is to revert most of the changes, except the one-line that sets the maxRam using vmTO https://github.com/apache/cloudstack/pull/7663/files#r1282627949 anybody who doesn't want to use the vm balloon feature can disable it (alternatively, we can change behaviour to have VM balloon feature disabled by default - not sure who's using dynamic scaling or if it even works by default).
cc @weizhouapache @DaanHoogland @harikrishna-patnala
DaanHoogland commentedon Aug 3, 2023
thanks @rohityadavcloud , am trying this now and will check both the "regression" and the original issue.
yadvr commentedon Aug 7, 2023
Fixed in #7810 cc @harikrishna-patnala @DaanHoogland pl check and re-open if that's not the case
DaanHoogland commentedon Aug 7, 2023
has been tested in #7810 and is ok, no worries