docs: use the auto deploy directory instead of the kubectl apply

docs/usage/guides/calico.md

@@ -1,21 +1,7 @@
 # Use Calico instead of Flannel
 If you want to use NetworkPolicy you can use Calico in k3s instead of Flannel.
 
-## 1. Disable Flannel
-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`.
-
-So the command of the cluster creation is
-```bash
-    k3d cluster create "${clustername}" --k3s-server-arg --flannel-backend=none
-```
-In this exemple change `"${clustername}"` with the name of the cluster (or set a variable). You can add other options, [see](../commands.md).  
-
-The cluster will start without flannel (and without other CNI).
-
-## 2. Install Calico
-Now you need to install Calico 
-
-### 2.1. Download and modify the Calico descriptor
+### 1. Download and modify the Calico descriptor
 You can following the [documentation](https://docs.projectcalico.org/master/reference/cni-plugin/configuration)
 
 And then you have to change the ConfigMap `calico-config`. On the `cni_network_config` add the entry for allowing IP forwarding  
@@ -24,22 +10,33 @@ And then you have to change the ConfigMap `calico-config`. On the `cni_network_c
         "allow_ip_forwarding": true
     }
 ```
-Or directly using the descriptor calico.yaml
-
+Or you can directly use this [calico.yaml](calico.yaml) manifest
 
-### 2.2. Apply the descriptor
-With kubectl (check the usage `kubectl kubeconfig` if you can't connect to the cluster).
+## 2. Create the cluster without flannel and with calico
+On the k3s cluster creation :
+- add the flag `--flannel-backend=none`. For this, on k3d you need to forward this flag to k3s with the option `--k3s-server-arg`.
+- mount (`--volume`) the calico descriptor in the auto deploy manifest directory of k3s `/var/lib/rancher/k3s/server/manifests/`
 
-From the root of the repository
+So the command of the cluster creation is (when you are at root of the k3d repository)
 ```bash
-    kubectl apply -f docs/usage/guides/calico.yaml
+    k3d cluster create "${clustername}" --k3s-server-arg '--flannel-backend=none' --volume "$(pwd)/docs/usage/guides/calico.yaml:/var/lib/rancher/k3s/server/manifests/calico.yaml"
 ```
+In this example :
+- change `"${clustername}"` with the name of the cluster (or set a variable). 
+- `$(pwd)/docs/usage/guides/calico.yaml` is the absolute path of the calico manifest, you can adapt it.
+
+You can add other options, [see](../commands.md).  
 
-And watch for the calico pod(s) deployment
+The cluster will start without flannel (and without other CNI).
+
+For watching for the pod(s) deployment
 ```
     watch "kubectl get pods -n kube-system"
 ```
-<!> Calico is not as quick as Flannel (but it provides more features)
+
+Note : 
+- you can use the auto deploy manifest or a kubectl apply depending on your needs
+- <!> Calico is not as quick as Flannel (but it provides more features)
 
 ## References
 https://rancher.com/docs/k3s/latest/en/installation/network-options/