KubeADM: Move shell commands to use bash and set env vars

This PS moves the shell module invocations to use bash and set the
required env vars explicity. This can seolve some issues on ubuntu
workstation hosts which uses dash for shell commands by default.

Change-Id: Ieb440e421d9d95676719d66fb4c787f88a9d8a2b

tools/images/kubeadm-aio/assets/opt/playbooks/roles/clean-host/tasks/main.yaml

@@ -29,6 +29,8 @@
 - name: clean | kube | removing any old docker containers
   ignore_errors: yes
   shell: MY_CONTAINER_ID=$(docker inspect --format {% raw %}'{{ .Id }}'{% endraw %} "{{ my_container_name }}"); docker ps --all --no-trunc --quiet | awk '!'"/${MY_CONTAINER_ID}/ { print \$1 }" | xargs -r -l1 -P16 docker rm -f
+  args:
+    executable: /bin/bash
 
 - name: clean | kube | remove any mounts
   ignore_errors: yes
@@ -36,6 +38,8 @@
         for MOUNT in $(findmnt --df --output TARGET | grep "^/var/lib/kubelet"); do
          umount --force $MOUNT
         done
+  args:
+    executable: /bin/bash
 
 - name: clean | kube | remove dirs
   file:

tools/images/kubeadm-aio/assets/opt/playbooks/roles/deploy-kubeadm-master/tasks/main.yaml

@@ -84,17 +84,25 @@
   delegate_to: 127.0.0.1
   block:
     - name: wait for kube api
-      shell: export KUBECONFIG=/mnt/rootfs/etc/kubernetes/admin.conf; python /usr/bin/test-kube-api.py
+      shell: python /usr/bin/test-kube-api.py
       register: task_result
       until: task_result.rc == 0
       retries: 120
       delay: 5
+      environment:
+        KUBECONFIG: '/mnt/rootfs/etc/kubernetes/admin.conf'
+      args:
+        executable: /bin/bash
     - name: wait for node to come online
-      shell: export KUBECONFIG=/mnt/rootfs/etc/kubernetes/admin.conf; kubectl get node "{{ kubeadm_node_hostname }}" --no-headers | gawk '{ print $2 }' | grep -q '\(^Ready\)\|\(^NotReady\)'
+      shell: kubectl get node "{{ kubeadm_node_hostname }}" --no-headers | gawk '{ print $2 }' | grep -q '\(^Ready\)\|\(^NotReady\)'
       register: task_result
       until: task_result.rc == 0
       retries: 120
       delay: 5
+      environment:
+        KUBECONFIG: '/mnt/rootfs/etc/kubernetes/admin.conf'
+      args:
+        executable: /bin/bash
     - include_tasks: wait-for-kube-system-namespace.yaml
 
 - name: deploying kube-proxy
@@ -107,11 +115,15 @@
   delegate_to: 127.0.0.1
   block:
     - name: wait for node to be ready
-      shell: export KUBECONFIG=/mnt/rootfs/etc/kubernetes/admin.conf; kubectl get node "{{ kubeadm_node_hostname }}" --no-headers | gawk '{ print $2 }' | grep -q '^Ready'
+      shell: kubectl get node "{{ kubeadm_node_hostname }}" --no-headers | gawk '{ print $2 }' | grep -q '^Ready'
       register: task_result
       until: task_result.rc == 0
       retries: 120
       delay: 5
+      environment:
+        KUBECONFIG: '/mnt/rootfs/etc/kubernetes/admin.conf'
+      args:
+        executable: /bin/bash
     - include_tasks: wait-for-kube-system-namespace.yaml
 
 # - name: deploying kube-dns addon

tools/images/kubeadm-aio/assets/opt/playbooks/roles/deploy-kubeadm-master/tasks/wait-for-kube-system-namespace.yaml

@@ -14,8 +14,12 @@
 
 - name: wait for kube pods to all be running in kube-system namespace
   delegate_to: 127.0.0.1
-  shell: export KUBECONFIG=/mnt/rootfs/etc/kubernetes/admin.conf; /usr/bin/test-kube-pods-ready kube-system
+  shell: /usr/bin/test-kube-pods-ready kube-system
   register: task_result
   until: task_result.rc == 0
   retries: 120
   delay: 5
+  environment:
+    KUBECONFIG: '/mnt/rootfs/etc/kubernetes/admin.conf'
+  args:
+    executable: /bin/bash

tools/images/kubeadm-aio/assets/opt/playbooks/roles/deploy-kubelet/tasks/kubelet.yaml

@@ -56,6 +56,8 @@
     - name: docker | getting cgroup driver info
       shell: docker info | awk '/^Cgroup Driver:/ { print $NF }'
       register: docker_cgroup_driver
+      args:
+        executable: /bin/bash
     - name: setting kublet cgroup driver
       set_fact:
         kubelet_cgroup_driver: "{{ docker_cgroup_driver.stdout }}"

tools/images/kubeadm-aio/assets/opt/playbooks/roles/deploy-kubelet/tasks/setup-dns.yaml

@@ -47,3 +47,5 @@
       until: task_result.rc == 0
       retries: 120
       delay: 5
+      args:
+        executable: /bin/bash