Update tfReplicaSpecs (#50)

* Update tfReplicaSpecs

* Address comments

1-docker/README.md

@@ -131,6 +131,7 @@ The next step is to build our image to be able to run it using docker. For that,
 From the [`./src`](./src) repository, we can build the image with
 
 ```console
+cd src
 docker build -t ${DOCKER_USERNAME}/tf-mnist .
 ```
 > Reminder: the `-t` argument allows to **tag** the image with a specific name.  
@@ -215,7 +216,8 @@ ENTRYPOINT ["python", "/app/main.py"]
 Then simply rebuild the image with a new tag (you can use docker or nvidia-docker interchangeably for any command except run):
 
 ```console
-docker build -t ${DOCKER_USERNAME}/tf-mnist:gpu .
+cd src
+docker build -t ${DOCKER_USERNAME}/tf-mnist:gpu -f Dockerfile.gpu .
 ```
 
 Finally run the container with nvidia-docker:

2-kubernetes/README.md

@@ -140,9 +140,9 @@ kubectl get nodes
 Should yield an output similar to this one:
 ```
 NAME                       STATUS    ROLES     AGE       VERSION
-aks-nodepool1-42640332-0   Ready     agent     1h        v1.9.6
+aks-nodepool1-42640332-0   Ready     agent     1h        v1.11.1
-aks-nodepool1-42640332-1   Ready     agent     1h        v1.9.6
+aks-nodepool1-42640332-1   Ready     agent     1h        v1.11.1
-aks-nodepool1-42640332-2   Ready     agent     1h        v1.9.6
+aks-nodepool1-42640332-2   Ready     agent     1h        v1.11.1
 ```
 
 If you provisioned GPU VM, describing one of the node should indicate the presence of GPU(s) on the node:

6-tfjob/README.md

@@ -37,7 +37,7 @@ Before going further, let's take a look at what the `TFJob` object looks like:
 
 | Field | Type| Description |
 |-------|-----|-------------|
-| ReplicaSpecs | `TFReplicaSpec` array | Specification for a set of TensorFlow processes, defined below |
+| TFReplicaSpec | `TFReplicaSpec` array | Specification for a set of TensorFlow processes, defined below |
 
 Let's go deeper: 
 
@@ -57,11 +57,13 @@ kind: TFJob
 metadata:
   name: example-tfjob
 spec:
-  replicaSpecs:
+  tfReplicaSpecs:
-    - template:
+    MASTER:
+      replicas: 1
+      template:
         spec:
           containers:
-            - image: wbuchwalter/tf-mnist:gpu
+            - image: <DOCKER_USERNAME>/tf-mnist:gpu
               name: tensorflow
               resources:
                 limits:
@@ -87,8 +89,10 @@ kind: TFJob
 metadata:
   name: module6-ex1-gpu
 spec:
-  replicaSpecs:
+  tfReplicaSpecs:
-    - template:
+    MASTER:
+      replicas: 1
+      template:
         spec:
           containers:
             - image: <DOCKER_USERNAME>/tf-mnist:gpu  # From module 1