After the virtual machine is created, a lot of tedious and repetitive configuration work needs to be done each time. These tasks can also be completed by the cloud-init initialization tool. Currently, all public cloud platforms support the use of cloud-init to configure virtual machines. KubeVirt also supports cloud-init. Cloud images are basically installed with the cloud-init tool. Let’s take a look at how the KubeVirt virtual machine initializes the virtual machine.
NIC static IP
networkData: |
network:
version: 1
config:
- type: physical
name: eth0
mac_addres: "00:00:00:d8:90:08"
subnets:
- type: static
address: 172.16.3.197
netmask: 255.255.255.0
routes:
- network: 0.0.0.0
netmask: 0.0.0.0
gateway: 172.16.3.2
system time zone
userData: |-
#cloud-config
timezone: Asia/Kathmandu
Allow password login
userData: |-
#cloud-config
ssh_pwauth: True
Set user password
userData: |-
#cloud-config
chpasswd:
list: |
root:password
centos:password
expire: False
Configure hostname
userData: |-
#cloud-config
hostname: website.sukai.com.np
Create a file
userData: |-
#cloud-config
write_files:
- path: "/etc/selinux/config"
encoding: base64
content: 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
- path: /etc/rc.local
permissions: "0755"
owner: root
content: |
#!/bin/bash
touch /var/lock/subsys/local
arp -s 172.16.3.2 b8:69:f4:e6:5a:51
Excuting an order
userData: |-
#cloud-config
runcmd:
- echo 172.16.3.197 website.sukai.com.np >> /etc/hosts
- [ chmod, +x, /etc/rc.d/rc.local]
- [ arp, -s, 172.16.3.2, 'b8:69:f4:e6:5a:51']
- echo nameserver 103.98.131.106 >> /etc/resolv.conf
- [ sed, -i, -e, '/192.168.122.1/d', /etc/resolv.conf]
- [ yum, -t, -y, update]
- [ yum, -t, -y, install, screen, wget]
- [ reboot]
Full configuration
- name: cloudinitdisk
cloudInitNoCloud:
networkData: |
network:
version: 1
config:
- type: physical
name: eth0
mac_addres: "00:00:00:d8:90:08"
subnets:
- type: static
address: 172.16.3.197
netmask: 255.255.255.0
routes:
- network: 0.0.0.0
netmask: 0.0.0.0
gateway: 172.16.3.2
userData: |-
#cloud-config
ssh_pwauth: True
timezone: Asia/Kathmandu
chpasswd:
list: |
root:password
centos:password
expire: False
hostname: website.sukai.com.np
write_files:
- path: "/etc/selinux/config"
encoding: base64
content: 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
- path: /etc/rc.local
permissions: "0755"
owner: root
content: |
#!/bin/bash
touch /var/lock/subsys/local
arp -s 172.16.3.2 b8:69:f4:e6:5a:51
runcmd:
- echo 172.16.3.197 website.sukai.com.np >> /etc/hosts
- [ chmod, +x, /etc/rc.d/rc.local]
- [ arp, -s, 172.16.3.2, 'b8:69:f4:e6:5a:51']
- echo nameserver 103.98.131.106 >> /etc/resolv.conf
- [ sed, -i, -e, '/192.168.122.1/d', /etc/resolv.conf]
- [ yum, -t, -y, update]
- [ yum, -t, -y, install, screen, wget]
- [ reboot]
