docs/doc/source/kube-virt/static-ip-assignment-via-cloudinit-configuration-d053375e78fa.rst

Static IP Assignment via Cloudinit Configuration

KubeVirt supports cloud-init's NoCloud and ConfigDrive datasources, which involve injecting startup scripts into a instance using of an ephemeral disk. with the cloud-init package installed detect the ephemeral disk and execute custom userdata scripts at boot.

In the example below, the is using NoCloud for assigning the static IP and MAC address on interface.

cat <<EOF>cloud-NoCloud-test.yaml
apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
  labels:
    special: vmi-sriov-network
  name: vmi-sriov-test-vm-1
spec:
  running: true
  template:
    metadata:
      labels:
        kubevirt.io/size: small
        kubevirt.io/domain: fedora
    spec:
      domain:
        cpu:
          cores: 4
        devices:
          disks:
          - name: containerdisk
            disk:
              bus: virtio
          - name: cloudinitdisk
            disk:
              bus: virtio
          interfaces:
          - masquerade: {}
            name: default
          - macAddress: "02:00:00:00:00:03"
            name: sriov-net1
            sriov: {}
          rng: {}
        resources:
          requests:
            memory: 1024M
      networks:
      - name: default
        pod: {}
      - multus:
          networkName: sriov-net1
        name: sriov-net1
      volumes:
      - containerDisk:
          image: docker.io/kubevirt/fedora-cloud-container-disk-demo:devel
        name: containerdisk
      - cloudInitNoCloud:
          networkData: |
            ethernets:
              sriov-net1:
                addresses:
                - 10.10.10.42/24
                gateway: 10.10.10.1
                match:
                  macAddress: "02:00:00:00:00:03"
                nameservers:
                  addresses:
                  - 10.96.0.10
                  search:
                  - default.svc.cluster.local
                  - svc.cluster.local
                  - cluster.local
                set-name: sriov-link-enabled
            version: 2
          userData: |-
            #!/bin/bash
            echo "fedora" |passwd fedora --stdin
        name: cloudinitdisk
EOF

kubectl apply -f cloud-NoCloud-test.yaml


[sysadmin@controller-0 kubevirt-GA-testing(keystone_admin)]$ kubectl get vmi
NAME                  AGE     PHASE     IP               NODENAME       READY
vmi-sriov-test-vm-1   3h17m   Running   172.16.166.152   controller-1   True

[sysadmin@controller-0 kubevirt-GA-testing(keystone_admin)]$ virtctl console vmi-sriov-test-vm-1
Successfully connected to vmi-sriov-test-vm-1 console. The escape sequence is ^]vmi-sriov-test-vm-1 login: fedora
Password:
[fedora@vmi-sriov-test-vm-1 ~]$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:90:b4:d7 brd ff:ff:ff:ff:ff:ff
    altname enp1s0
    inet 10.0.2.2/24 brd 10.0.2.255 scope global dynamic noprefixroute eth0
       valid_lft 86301690sec preferred_lft 86301690sec
    inet6 fe80::5054:ff:fe90:b4d7/64 scope link
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 02:00:00:00:00:03 brd ff:ff:ff:ff:ff:ff
    altname enp8s0
    inet 10.10.10.42/24 brd 10.10.10.10.255 scope global noprefixroute eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::ff:fe00:3/64 scope link
       valid_lft forever preferred_lft forever
[fedora@vmi-sriov-test-vm-1 ~]$