# CNI Network Not Found

**URL:** <https://discuss.hashicorp.com/t/cni-network-not-found/63135>\
**Category:** Nomad\
**Created:** [February 26, 2024, 2:07am UTC](https://discuss.hashicorp.com/t/cni-network-not-found/63135 "2024-02-26T02:07:18Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![karsten.leone](https://avatars.discourse-cdn.com/v4/letter/k/f17d59/32.png) [@karsten.leone](https://discuss.hashicorp.com/u/karsten.leone)\
**Post date:** [February 26, 2024, 2:07am UTC](https://discuss.hashicorp.com/t/cni-network-not-found/63135/1 "2024-02-26T02:07:18Z")

</div>

I’m tying to use the ipvlan cni plugin in a job but the job always reports that the network can’t be found.

```auto
client.driver_mgr.docker: failed to start container: driver=docker container_id=b7a91dd1c958606bb2f75cc3f803d1a0df9e415740a3bbf60a1e705716a13457 attempt=1 error="API error (404): network cni/pub not found"

```

Nomad detects the interface:

`2024-02-25T15:53:11.359-0800 [DEBUG] client.fingerprint_mgr: detected CNI network: name=pub`

But it always fails to find it.

Here’s my cni plugin config:

```auto
{
     "cniVersion": "0.4.0",
          "name": "pub",
          "disableCheck": true,
          "plugins": [
          {
               "type": "ipvlan",
               "master": "eth1",
               "ipam": {
                    "type": "static",
                    "addresses": 
                         [
                    {
                         "address": "10.10.30.150/24",
                         "gateway": "10.10.30.1"
                    }],

                    "routes" : [
                         { "dst": "0.0.0.0" }
                    ],
                    "dns": {
                         "nameservers" : ["10.10.30.121"],
                         "domain": "example.com",
                         "search": ["example.com"]
                    }
               }
          },
        {
          "type": "portmap",
          "capabilities": { "portMappings": true },
          "snat": true
        }

     ]
}

```

I’ve tried specifying the cni network in my job in multiple ways:

```auto
group "test" {
    count = 1

    network {
      mode = "cni/pub"

```

And like this:

```auto
    task "test-ipvlan" {
      driver = "docker"
      config {
        network_mode = "cni/pub"

```

It does work if I create the pub network manually using ‘docker network create’.

This happens with any cni network or network type that I define (ipvlan, bridge, dhcp are the ones that I’ve tried).

I’m pretty sure that I’m missing something pretty simple here.

---

<div class="post-metadata">

**Author:** ![rtwolfe](https://sea2.discourse-cdn.com/hashicorp/user_avatar/discuss.hashicorp.com/rtwolfe/32/39999_2.png) [@rtwolfe](https://discuss.hashicorp.com/u/rtwolfe)\
**Post date:** [February 26, 2024, 12:25pm UTC](https://discuss.hashicorp.com/t/cni-network-not-found/63135/2 "2024-02-26T12:25:01Z")

</div>

Ensure your CNI config file is in the correct directory (`/opt/cni/config`), CNI plugins are installed in `/opt/cni/bin`, and your Nomad client is configured to use the right network interface. In your job spec, use `mode = "cni/pub"` under the `network` stanza at the group level, not under `config` for the Docker driver. If the issue persists, check Nomad logs for more insights and verify CNI plugin compatibility with your Nomad version.

---

<div class="post-metadata">

**Author:** ![karsten.leone](https://avatars.discourse-cdn.com/v4/letter/k/f17d59/32.png) [@karsten.leone](https://discuss.hashicorp.com/u/karsten.leone)\
**Post date:** [February 26, 2024, 3:25pm UTC](https://discuss.hashicorp.com/t/cni-network-not-found/63135/3 "2024-02-26T15:25:31Z")

</div>

My config is in /opt/cni/config and the plugins are in /opt/cni/bin. I might have been unclear in what I tried. I did try configuring it in the network stanza like this:

```auto
group "test" {
    count = 1

    network {
      mode = "cni/pub"

```

And get this error:

```auto
failed to setup alloc: pre-run hook "network" failed: failed to create network for alloc

```

It’s clear that nomad IS seeing the cni networks so I don’t think it’s an issue with the cni paths. From nomad debug logs:

```auto
2024-02-25T15:53:11.359-0800 [DEBUG] client.fingerprint_mgr: detected CNI network: name=pub

```

I’m not sure where to go from here.

---

<div class="post-metadata">

**Author:** ![karsten.leone](https://avatars.discourse-cdn.com/v4/letter/k/f17d59/32.png) [@karsten.leone](https://discuss.hashicorp.com/u/karsten.leone)\
**Post date:** [February 27, 2024, 4:35pm UTC](https://discuss.hashicorp.com/t/cni-network-not-found/63135/4 "2024-02-27T16:35:31Z")

</div>

Solved. Apparently this was actually an issue grabbing the pause container. I repointed to my internal registry by setting infra\_image in my nomad config.

Thanks for the assistance!