Updating NICs on SmartOS

After moving a machine from one Hypervisor to another it may be necessary to change some parameters, particularly likely are Network settings. This is a snippet for making changes to NIC configuration using an input file.

1) Update hostname and other trivial metadata. Hostname stored in the zone at /etc/nodename and /etc/hosts needs to be manually changed.

        # echo '{"hostname": "rts-build-01.rts004.racktoplabs.com"}' | vmadm update bf43a067-b619-4383-bf6a-e2c44f0de575

2) Get information about NICs setup in the VM.

        # vmadm get bf43a067-b619-4383-bf6a-e2c44f0de575|json  nics
        [
          {
            "interface": "net0",
            "mac": "c2:cb:8a:ea:e2:96",
            "vlan_id": 4,
            "nic_tag": "v0004dev",
            "gateway": "10.1.4.254",
            "primary": true,
            "ip": "10.1.4.17",
            "netmask": "255.255.255.0"
          }
        ]

3) Copy previous output and make any necessary changes to a JSON file which will be our input, so it looks like this.

        {
            "update_nics": [
                {
                    "interface": "net0",
                    "mac": "c2:cb:8a:ea:e2:96",
                    "nic_tag": "v0004dev",
                    "gateway": "10.1.4.254",
                    "index": 0,
                    "ip": "10.1.4.17",
                    "netmask": "255.255.255.0",
                    "physical": "v0004dev01",
                    "vlan_id": 4,
                    "primary": true
                }
            ]
        }


4) Finally, apply changes made to input-file.json to the zone configuration.

        # cat updated_nic_config.json | vmadm update bf43a067-b619-4383-bf6a-e2c44f0de575