Merge branch 'nvidia_gpu_install' into 'master'

Adding Nvidia gpu-operator installation

See merge request !41

common/playbooks/k8s.yaml

@@ -559,3 +559,71 @@
         PATH: /sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin
       changed_when: true
       when: true
+# TODO: Following step can be removed as gpu-operator
+# installs drivers in containers but it requires
+# the latest kernels or a workaround is needed -
+# provide an outdated kernel repo for operator to access
+# drivers or install drivers yourself into the host kernel
+- name: Nvidia GPU driver deployment
+  hosts: gpu
+  become: true
+  tasks:
+    - name: Install ubuntu-drivers package
+      apt:
+        name: ubuntu-drivers-common
+        update_cache: true
+    - name: Install Nvidia driver packages
+      shell: |-
+        ubuntu-drivers install
+      changed_when: true
+    - name: Reboot GPU node
+      reboot:
+        reboot_timeout: 600
+- name: Install Nvidia GPU operator and enable MIGs
+  hosts: master[0]
+  become: true
+  tasks:
+    - block:
+      - name: Configure Nvidia gpu-operator Helm repo
+        shell: |-
+          helm repo add nvidia https://helm.ngc.nvidia.com/nvidia
+          helm repo update
+        changed_when: true
+        when: "'nvidia' not in ansible_local.helm_repos | map(attribute='name') | list"
+      - name: Deploy/upgrade Nvidia gpu-operator instance
+        vars:
+          driver_enabled: false # if set to true the operator will install containerized drivers
+          mig_strategy: single
+        shell: |-
+          helm status --namespace gpu-operator gpu-operator
+          if [ $? -ne 0 ]; then
+              helm install --wait --create-namespace --namespace gpu-operator \
+                gpu-operator  nvidia/gpu-operator --set driver.enabled={{ driver_enabled }} \
+                 --set mig.strategy={{ mig_strategy }}
+          else
+              helm upgrade --wait --namespace gpu-operator  \
+                gpu-operator  nvidia/gpu-operator  --set driver.enabled={{ driver_enabled }} \
+                  --set mig.strategy={{ mig_strategy }}
+          fi
+        changed_when: true
+        when: true
+      - name: Get GPU node hostnames
+        shell: |-
+          kubectl get nodes --no-headers -o custom-columns=NAME:.metadata.name | grep gpu
+        register: gpu_nodes
+        changed_when: true
+        when: true
+      - name: Print GPU node hostnames
+        debug:
+          var: gpu_nodes
+      - name: Add required label to GPU nodes to create mig profiles
+        vars:
+          mig_profile: all-1g.12gb
+        shell: |-
+          kubectl label node {{ item }} nvidia.com/mig.config={{ mig_profile }} --overwrite
+        loop: "{{ gpu_nodes.stdout_lines }}"
+        changed_when: true
+        when: true
+      environment:
+        KUBECONFIG: /etc/kubernetes/admin.conf
+        PATH: /sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin