Simplify persistence configuration & expose macos folders

We now map ~/.wiki-k8s in MacOS into the .wiki folder inside the
container and similarly with MacOS ~/workspace/fedwiki

First, when we create the k3d cluster, we include directives that are
passed through to docker to mount the MacOS directories into the
kubernetes host.

Second, we use hostPath volumes in the kubernetes deployment config.

These will work great for the primary use case of a local wiki.
Deployments to remote kubernetes clusters will want to do this with
the PersistentVolumeClaim that was removed with this change.

One luxury of using hostPath and the legacy_security is that we no
longer require an init container.

examples/k8s/README.md

@@ -7,7 +7,13 @@ using wiki to drive some learning about kubernetes.
 
     brew cask install docker
     brew install k3d
-    k3d create --publish 80:80 --name wiki
+
+    mkdir -p ~/.wiki-k8s ~/workspace/fedwiki
+    k3d create \
+      --publish 80:80 \
+      -v "$HOME/.wiki-k8s:/macos/.wiki-k8s" \
+      -v "$HOME/workspace/fedwiki:/macos/fedwiki" \
+      --name wiki
 
 # Deploy Wiki
 

examples/k8s/wiki.yaml

@@ -1,15 +1,3 @@
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  name: dot-wiki
-spec:
-  accessModes:
-    - ReadWriteOnce
-  volumeMode: Filesystem
-  resources:
-    requests:
-      storage: 4Gi
----
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -28,17 +16,6 @@ spec:
         runAsUser: 1000
         runAsGroup: 1000
         fsGroup: 1000
-      initContainers:
-      - name: wiki-config
-        image: dobbs/farm:1.0.0
-        securityContext:
-          runAsUser: 0
-          runAsGroup: 0
-          allowPrivilegeEscalation: false
-        volumeMounts:
-          - name: dot-wiki
-            mountPath: /home/node/.wiki
-        command: ["chown", "-R", "1000:1000", "/home/node/.wiki"]
       containers:
       - name: farm
         image: dobbs/farm:1.0.1
@@ -48,10 +25,15 @@ spec:
         volumeMounts:
           - name: dot-wiki
             mountPath: /home/node/.wiki
+          - name: fedwiki
+            mountPath: /home/node/fedwiki
       volumes:
       - name: dot-wiki
-        persistentVolumeClaim:
-          claimName: dot-wiki
+        hostPath:
+          path: /macos/.wiki-k8s
+      - name: fedwiki
+        hostPath:
+          path: /macos/fedwiki
 ---
 apiVersion: v1
 kind: Service