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October 4, 2020 17:02
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Libvirt-KVM create Bridge Interface using nmcli
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### Show Active Interfaces | |
``` | |
$ nmcli con show --active | |
``` | |
### Create a Bridge Interface | |
``` | |
$ nmcli con add ifname br0 type bridge con-name br0 | |
Connection 'br0' (892869fe-f8ac-4f17-ace9-b8aeeeee61a0) successfully added. | |
``` | |
### Link Bridge Interface to Real Interface (enp0s25 on this recipe) | |
``` | |
$ nmcli con add type bridge-slave ifname enp0s25 master br0 | |
Connection 'bridge-slave-enp0s25' (33ee8c62-48d8-4789-97df-604c479b6860) | |
successfully added. | |
``` | |
### Remove Spanning Tree Configuration | |
``` | |
$ nmcli con modify br0 bridge.stp no | |
``` | |
### Bring Down previous Ethernet (Wireless or Cable-linked) Connection, associated with bridged interface (enp0s25 on this recipe): | |
``` | |
$ nmcli con down wired-direct | |
``` | |
### Bring Up the new Bridge Interface: | |
``` | |
$ nmcli con up br0 | |
``` | |
### Restart NetworkManager Service | |
``` | |
$ sudo systemctl restart NetworkManager.service | |
``` | |
That's all if your Terraform scripts manage bridge interfaces creation and usage. In case you are using libvirt from command-line, without automations: | |
### Verify current Networks on Libvirt: | |
``` | |
$ virsh net-list --all | |
Name State Autostart Persistent | |
---------------------------------------------------------- | |
default active yes yes | |
``` | |
### Create a New Network Interface | |
``` | |
$ cat > bridge.xml <<EOF | |
<network> | |
<name>host-bridge</name> | |
<forward mode="bridge"/> | |
<bridge name="br0"/> | |
</network> | |
EOF | |
$ virsh net-define bridge.xml | |
Network host-bridge defined from bridge.xml | |
``` | |
### Start New Interface and Setup it for Autostart: | |
``` | |
$ virsh net-start host-bridge | |
Network host-bridge started | |
$ virsh net-autostart host-bridge | |
Network host-bridge marked as autostarted | |
``` |
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