update instructions to cover podman (#1274)

Signed-off-by: salaboy <Salaboy@gmail.com>
Co-authored-by: artur-ciocanu <artur.ciocanu@gmail.com>
Co-authored-by: Cassie Coyle <cassie@diagrid.io>

spring-boot-examples/kubernetes/README.md

@@ -13,6 +13,17 @@ with a local container registry, so we can push our container images to it. This
 ./kind-with-registry.sh
 ```
 
+**Note**: If you are using Podman Desktop, instead of Docker you need to run the following command to enable insecure registries:
+
+```
+read -r -d '' registry_conf <<EOF
+[[registry]]
+location = "localhost:5001"
+insecure = true
+EOF
+podman machine ssh --username=root sh -c 'cat > /etc/containers/registries.conf.d/local.conf' <<<$registry_conf
+```
+
 Once you have the cluster up and running you can install Dapr: 
 
 ```bash
@@ -39,10 +50,15 @@ Once we have the container image created, we need to tag and push to the local r
 Alternatively, you can push the images to a public registry and update the Kubernetes manifests accordingly. 
 
 ```bash
-docker tag producer-app:0.14.0-SNAPSHOT localhost:5001/sb-producer-app
+docker tag producer-app:0.15.0-SNAPSHOT localhost:5001/sb-producer-app
 docker push localhost:5001/sb-producer-app
 ```
 
+**Note**: for Podman you need to run: 
+```
+podman push localhost:5001/sb-producer-app --tls-verify=false
+```
+
 From inside the `spring-boot-examples/consumer-app` directory you can run the following command to create a container:
 ```bash
 mvn spring-boot:build-image
@@ -52,10 +68,15 @@ Once we have the container image created, we need to tag and push to the local r
 Alternatively, you can push the images to a public registry and update the Kubernetes manifests accordingly.
 
 ```bash
-docker tag consumer-app:0.14.0-SNAPSHOT localhost:5001/sb-consumer-app
+docker tag consumer-app:0.15.0-SNAPSHOT localhost:5001/sb-consumer-app
 docker push localhost:5001/sb-consumer-app
 ```
 
+**Note**: for Podman you need to run: 
+```
+podman push localhost:5001/sb-consumer-app --tls-verify=false
+```
+
 Now we are ready to install our application into the cluster.
 
 ## Installing and interacting with the application

spring-boot-examples/kubernetes/kind-with-registry.sh

@@ -11,8 +11,10 @@ if [ "$(docker inspect -f '{{.State.Running}}' "${reg_name}" 2>/dev/null || true
 fi
 
 # 2. Create kind cluster with containerd registry config dir enabled
-# TODO: kind will eventually enable this by default and this patch will
-# be unnecessary.
+#
+# NOTE: the containerd config patch is not necessary with images from kind v0.27.0+
+# It may enable some older images to work similarly.
+# If you're only supporting newer relases, you can just use `kind create cluster` here.
 #
 # See:
 # https://github.com/kubernetes-sigs/kind/issues/2875