Add host process results in incorrect libvirtd settings for Ubuntu VERSION="24.04.1 LTS (Noble Numbat)"

[ffslcschools]

ISSUE TYPE

• Bug Report

COMPONENT NAME

Host agent processing script.

CLOUDSTACK VERSION

CloudStack 4.19.1.1

CONFIGURATION

Advanced networking

OS / ENVIRONMENT

PRETTY_NAME="Ubuntu 24.04.1 LTS" NAME="Ubuntu" VERSION_ID="24.04" VERSION="24.04.1 LTS (Noble Numbat)" VERSION_CODENAME=noble ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/" SUPPORT_URL="https://help.ubuntu.com/" BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy" UBUNTU_CODENAME=noble LOGO=ubuntu-logo

SUMMARY

When adding a kvm host to Cloudstack, the agent configuration automatically adds the option libvirtd_opts='-l' to /etc/default/libvirtd. This creates failures for live migrations between cluster hosts. Documentation here https://docs.cloudstack.apache.org/en/latest/installguide/hypervisor/kvm.html is correct, stating that Ubuntu 20.04 and newer should use the option LIBVIRTD_ARGS="--listen". The documentation is confusing in that it seems to tell you to make these changes manually, but the host provisioning process modifies all of the files referenced.

STEPS TO REPRODUCE

Simply adding a host via the web interface will do this at least when the host os version is Ubuntu 24.04.1 LTS.

EXPECTED RESULTS

The proper existing settings to be uncommented or at least added to the end of the config files as the documentation states.

ACTUAL RESULTS

Agent configuration process automatically adds the option libvirtd_opts='-l' to /etc/default/libvirtd when the os version is newer than 20.04.

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[weizhouapache]

If network/bridges have already been configured, ACS will not configure the host again.

The automatic configuration on kvm host is out of date, it does not work on some new distributions, due to libvirtd/netplan/nmcli etc. Users are suggested to configure libvirtd, linux bridge or ovs manually before adding the host to cloudstack.

[ffslcschools]

Is there a way to disable the automatic configuration during host provisioning?

[weizhouapache]

Is there a way to disable the automatic configuration during host provisioning?

@ffslcschools yes if the network (linux bridges) have been configured correctly, the node is considered as preconfigured, ACS will not reconfigure it