Increasing the capacity of MicroOVN (OVN)

LXD MicroCloud
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1

I’m having a hard time figuring out how to increase the number of dynamic IP addresses that MicroOVN has to offer to VM’s and containers. The cluster is setup using the microcloud init. I believe this limitation is due to the port lxd-net2-lr-lrp-int networks setting. Bumping that up to /16 for IPv4 would be sufficient. Or is the better approach is to spin up another OVN and link them together? I did see a forum discussion, saying that MicroOVN only manages one network so I’m not sure that’s ideal.

Error: Failed to start device "eth0": Failed setting up OVN port: Insufficient dynamic addresses allocated

sudo microovn.ovn-nbctl show
switch a98c1f26-09ec-4784-95d7-e08bedb8af0f (lxd-net2-ls-int)
    port lxd-net2-ls-int-lsp-router
        type: router
        router-port: lxd-net2-lr-lrp-int
switch 1125aad2-5227-4474-99d2-5f714f9821f3 (lxd-net2-ls-ext)
    port lxd-net2-ls-ext-lsp-provider
        type: localnet
        addresses: ["unknown"]
    port lxd-net2-ls-ext-lsp-router
        type: router
        router-port: lxd-net2-lr-lrp-ext
router 36f9a3e3-651c-4f9c-a2fd-f95a728e94a4 (lxd-net2-lr)
    port lxd-net2-lr-lrp-int
        mac: "00:16:3e:99:04:20"
        networks: ["10.17.149.1/24", "fd42:7db0:8728:4684::1/64"]
    port lxd-net2-lr-lrp-ext
        mac: "00:16:3e:99:04:20"
        networks: ["10.10.10.212/24"]
    nat 2f64a244-81b9-40fb-9742-00258fdfc749
        external ip: "10.10.10.212"
        logical ip: "10.17.149.0/24"
        type: "snat"
2

What does lxc network show <ovn network> show?

Also how many instances do you have connected to the ovn network?

3

This is untrue, you can use many OVN networks with LXD and MicroOVN.

You should be able to change the subnet of your OVN network by doing:

lxc network set <ovn network> ipv4.address=n.n.n.n/16
4

That’s the command I was looking for! I noticed it was similar to the print out from OVN but wasn’t sure if it was referencing the dynamic address pool of OVN or not.

It appears that the `sudo lxc network set ipv4.address=“n.n.n.1/16” is exactly what I needed.

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