CentOS 8.x Cloudstack 4.15 Setup KVM host

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CentOS 8.x Cloudstack 4.15 Setup KVM host

To setup Cloudstack 4.15 KVM host use following steps:

1. Initialize server using CentOS 8.x Cloudstack 4.15 Initialize infrastructure server
2. Create bridge interface cloudbr0, cloudbr1, etc. based on interfaces to be used for cloud setup.

   Refer: CentOS 8.x Creating bridge interfaces (br0) for virtual hosts to use shared interface

   Best option is to create two bridges cloudbr0 and cloudbr1. Keep public, management and storage on cloudbr0. Keep only guest on cloudbr1. cloudbr0 network NIC can be access VLAN for public/management/storage. cloudbr1 should be trunk port for all other VLANs.

   In case of bridges you can consider adding following additional configuration:

   HOTPLUG=no
   DELAY=0
   STP=no

3. Install virt packages

   dnf -y module install virt
   dnf -y install virt-install virt-viewer

4. Change below parameters in '/etc/libvirt/libvirtd.conf' file

   listen_tls = 0
   listen_tcp = 1
   tcp_port = "16509"
   auth_tcp = "none"

5. Update '/etc/sysconfig/libvirtd' as follows:

   #LIBVIRTD_ARGS="--timeout 120"
   LIBVIRTD_ARGS="--listen"

6. Run below command for enable --listen for libvirtd service so that it works in traditional mode instead of systemd socket activation mode (Refer '<tt<man libvirtd')

   systemctl mask libvirtd.socket libvirtd-ro.socket libvirtd-admin.socket libvirtd-tls.socket libvirtd-tcp.socket

7. Start and enable the libvirtd service

   systemctl daemon-reload
   systemctl start libvirtd
   systemctl enable libvirtd
   systemctl status libvirtd

8. Configure cloudstack repository by creating '/etc/yum.repos.d/cloudstack.repo'

   [cloudstack]
   name=cloudstack
   baseurl=http://download.cloudstack.org/centos/$releasever/4.15/
   enabled=1
   gpgcheck=0

9. Install cloudstack-management package:

   dnf -y install cloudstack-agent

10. Mount primary storage on appropriate location on all hosts eg /mnt/primary (Except in case of NFS)
11. Enable CloudStack agent

    systemctl enable cloudstack-agent.service

    Note that service would fail to start at this stage. It would get started while adding the KVM host to cloudstack

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