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47 lines
1.6 KiB
47 lines
1.6 KiB
4 years ago
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# Use Calico instead of Flannel
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If you want to use NetworkPolicy you can use Calico in k3s instead of Flannel.
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## 1. Disable Flannel
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On the k3s cluster creation add the flag `--flannel-backend=none`. For this on k3d you need to foward this flag to k3s with the option `--k3s-server-arg`.
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So the command of the cluster creation is
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```bash
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k3d cluster create "${clustername}" --k3s-server-arg --flannel-backend=none
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```
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In this exemple change `"${clustername}"` with the name of the cluster (or set a variable). You can add other options, [see](../commands.md).
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The cluster will start without flannel (and without other CNI).
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## 2. Install Calico
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Now you need to install Calico
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### 2.1. Download and modify the Calico descriptor
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You can following the [documentation](https://docs.projectcalico.org/master/reference/cni-plugin/configuration)
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And then you have to change the ConfigMap `calico-config`. On the `cni_network_config` add the entry for allowing IP forwarding
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```json
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"container_settings": {
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"allow_ip_forwarding": true
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}
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```
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Or directly using the descriptor calico.yaml
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### 2.2. Apply the descriptor
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With kubectl (check the usage `kubectl kubeconfig` if you can't connect to the cluster).
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From the root of the repository
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```bash
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kubectl apply -f docs/usage/guides/calico.yaml
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```
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And watch for the calico pod(s) deployment
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```
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watch "kubectl get pods -n kube-system"
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```
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<!> Calico is not as quick as Flannel (but it provides more features)
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## References
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https://rancher.com/docs/k3s/latest/en/installation/network-options/
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https://docs.projectcalico.org/getting-started/kubernetes/k3s/
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