Adopt kind 0.31.0

Kind 0.31.0 brings a newer version of containerd which no longer
supports configuring registry mirroes. Instead, we need to configure
a `hosts.toml` file on all node containers per registry.

This change configures the node to "resolve"
`localregistry-docker-registry.default.svc.cluster.local:30050` to
`localhost:30050` where `30050` is the twuni docker registry node port.

References:

https://kind.sigs.k8s.io/docs/user/local-registry/
https://github.com/containerd/containerd/blob/main/docs/cri/config.md#registry-configuration

Co-authored-by: Georgi Sabev <georgethebeatle@gmail.com>

Author: danail-branekov

INSTALL.kind.md

@@ -13,18 +13,16 @@ In order to install korifi on kind effortlessly we have prepared an installation
 In order to access the Korifi API, we'll need to [expose the cluster ingress locally](https://kind.sigs.k8s.io/docs/user/ingress/). To do it, create your kind cluster using a command like this:
 
 ```sh
-cat <<EOF | kind create cluster --name korifi --config=-
+REGISTRY_HOST="localregistry-docker-registry.default.svc.cluster.local:30050"
+REGISTRY_DIR="/etc/containerd/certs.d/$REGISTRY_HOST"
+
+cat <<EOF | kind create cluster --name "korifi" --config=-
 kind: Cluster
 apiVersion: kind.x-k8s.io/v1alpha4
 containerdConfigPatches:
 - |-
   [plugins."io.containerd.grpc.v1.cri".registry]
-    [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
-      [plugins."io.containerd.grpc.v1.cri".registry.mirrors."localregistry-docker-registry.default.svc.cluster.local:30050"]
-        endpoint = ["http://127.0.0.1:30050"]
-    [plugins."io.containerd.grpc.v1.cri".registry.configs]
-      [plugins."io.containerd.grpc.v1.cri".registry.configs."127.0.0.1:30050".tls]
-        insecure_skip_verify = true
+    config_path = "/etc/containerd/certs.d"
 nodes:
 - role: control-plane
   extraPortMappings:
@@ -38,6 +36,10 @@ nodes:
     hostPort: 30050
     protocol: TCP
 EOF
+
+cat <<EOF | docker exec -i korifi-control-plane sh -c "mkdir -p '${REGISTRY_DIR}' && cat >'${REGISTRY_DIR}/hosts.toml'"
+[host."http://127.0.0.1:30050"]
+EOF
 ```
 
 ## Install Korifi

scripts/assets/kind-config.yaml

@@ -3,12 +3,7 @@ apiVersion: kind.x-k8s.io/v1alpha4
 containerdConfigPatches:
 - |-
   [plugins."io.containerd.grpc.v1.cri".registry]
-    [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
-      [plugins."io.containerd.grpc.v1.cri".registry.mirrors."localregistry-docker-registry.default.svc.cluster.local:30050"]
-        endpoint = ["http://127.0.0.1:30050"]
-    [plugins."io.containerd.grpc.v1.cri".registry.configs]
-      [plugins."io.containerd.grpc.v1.cri".registry.configs."127.0.0.1:30050".tls]
-        insecure_skip_verify = true
+    config_path = "/etc/containerd/certs.d"
 nodes:
 - role: control-plane
   extraPortMappings:

scripts/deploy-on-kind.sh

@@ -106,6 +106,10 @@ function ensure_local_registry() {
     --set persistence.deleteEnabled=true \
     --set secrets.htpasswd='user:$2y$05$Ue5dboOfmqk6Say31Sin9uVbHWTl8J1Sgq9QyAEmFQRnq1TPfP1n2'
 
+  local registry_dir="/etc/containerd/certs.d/$LOCAL_DOCKER_REGISTRY_ADDRESS"
+  cat <<EOF | docker exec -i "$CLUSTER_NAME-control-plane" sh -c "mkdir -p '$registry_dir' && cat >'$registry_dir/hosts.toml'"
+[host."http://127.0.0.1:30050"]
+EOF
 }
 
 function install_dependencies() {