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Introduction

DCAE Platform in Dublin release supports new feature to deploy components via helm chart. This is enabled by integrating Cloudify Helm plugin into Cloudify Manager instance DCAE-Platform uses to deploy other required services. The cloudify Helm plugin itself is under CCSDK project delivered part of Casablanca. For Dublin, this plugin has been integrated into DCAE ONAP deployment.  Any chart available under chart rep-url specified as configuration input can be deployed.


Dublin Scope

The helm plugin was intended to support deployment scenario of stand-alone application similar to capability offered under OOM.  With this plugin integration, any charts packaged under ONAP OOM can be deployed through DCAE platform in ONAP. This provides an opportunity for operators  to use a single orchestration through Cloudify for deploying both Helm and TOSCA work flows if required. 

As all DCAE MS currently are TOSCA work flow based, the helm plugin is not used for DCAE component deployment.

Artifacts

Repository Path: https://gerrit.onap.org/r/gitweb?p=ccsdk/platform/plugins.git;a=tree;f=helm;h=945eb3159f61071a348791b1f00d1cf4c3c97e7d;hb=HEAD

Plugin:  https://nexus.onap.org/content/sites/raw/org.onap.ccsdk.platform.plugins/plugins/helm-4.0.0-py27-none-linux_x86_64.wgn

Type file: https://nexus.onap.org/content/sites/raw/org.onap.ccsdk.platform.plugins/type_files/helm/4.0.0/helm-type.yaml

Blueprint Template:

# ============LICENSE_START==========================================
# ===================================================================
# Copyright (c) 2019 AT&T
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#============LICENSE_END============================================
tosca_definitions_version: cloudify_dsl_1_3

imports:
  - http://www.getcloudify.org/spec/cloudify/4.3.1/types.yaml
  - "https://nexus.onap.org/service/local/repositories/raw/content/org.onap.ccsdk.platform.plugins/type_files/helm/4.0.0/helm-type.yaml"

inputs:
  tiller-server-ip:
    description: IP address of Kubernetes master node
  tiller-server-port:
    description: Nodeport of tiller server
  namespace:
    description: Target namespace to be installed under (requires to be new)
  chart-repo-url:
     default: https://nexus.onap.org/content/sites/oom-helm-staging
  chart-version :
    description: Chart version for identified component-name
  stable-repo-url:
    description: URL for stable repository
    type: string
    default: 'https://kubernetes-charts.storage.googleapis.com'
  config-url:
    default: ''
  config-format:
    default: 'yaml'
  component-name:
    description: onap component name
node_templates:
  dcaecomponent:
    type: onap.nodes.component
    properties:
      tiller-server-ip: { get_input: tiller-server-ip }
      tiller-server-port: { get_input: tiller-server-port }
      component-name: { get_input: component-name }
      chart-repo-url: { get_input: chart-repo-url }
      chart-version: { get_input: chart-version }
      namespace: { get_input: namespace }
      stable-repo-url: { get_input: stable-repo-url}
      config-url:  { get_input: config-url}
      config-format: { get_input: config-format}
outputs:
  dcaecomponent_install_status:
    value: { get_attribute: [ dcaecomponent, install-status ] }


There is also option to override the defaults using values.yaml equivalent using following blueprint template


Helm Template with Override 
# ============LICENSE_START==========================================
# ===================================================================
# Copyright (c) 2019 AT&T
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#============LICENSE_END============================================
tosca_definitions_version: cloudify_dsl_1_3

imports:
  - http://www.getcloudify.org/spec/cloudify/4.3.1/types.yaml
  - "https://nexus.onap.org/service/local/repositories/raw/content/org.onap.ccsdk.platform.plugins/type_files/helm/4.0.0/helm-type.yaml"

inputs:
  tiller-server-ip:
    description: IP address of Kubernetes master node
  tiller-server-port:
    description: Nodeport of tiller server
  namespace:
    description: Target namespace to be installed under (requires to be new)
  chart-repo-url:
     default: https://nexus.onap.org/content/sites/oom-helm-staging
  chart-version :
    description: Chart version for identified component-name
  stable-repo-url:
    description: URL for stable repository
    type: string
    default: 'https://kubernetes-charts.storage.googleapis.com'
  config-url:
    default: ''
  config-format:
    default: 'yaml'
  component-name:
    description: onap component name
node_templates:
  onap_env:
    type: onap.nodes.component
    properties:
      tiller-server-ip: { get_input: tiller-server-ip }
      tiller-server-port: { get_input: tiller-server-port }
      component-name: onap
      chart-repo-url: { get_input: chart-repo-url }
      chart-version: { get_input: chart-version }
      namespace: { get_input: namespace }
      stable-repo-url: { get_input: stable-repo-url}
      config: '{ "aaf": {"enabled": false}, "aai": {"enabled": false}, "appc": {"enabled": false}, "clamp": {"enabled": false}, "cli": {"enabled": false}, "consul": {"enabled": false}, "dcaegen2": {"enabled": false}, "dmaap": {"enabled": false}, "esr": {"enabled": false}, "log": {"enabled": false}, "sniro-emulator": {"enabled": false}, "msb": {"enabled": false}, "multicloud": {"enabled": false}, "nbi": {"enabled": false}, "oof": {"enabled": false}, "policy": {"enabled": false}, "pomba": {"enabled": false}, "portal": {"enabled": false}, "robot": {"enabled": false}, "sdc": {"enabled": false}, "sdnc": {"enabled": false}, "so": {"enabled": false}, "uui": {"enabled": false}, "vfc": {"enabled": false}, "vid": {"enabled": false}, "vnfsdk": {"enabled": false} }'

  dcaecomponent:
    type: onap.nodes.component
    properties:
      tiller-server-ip: { get_input: tiller-server-ip }
      tiller-server-port: { get_input: tiller-server-port }
      component-name: { get_input: component-name }
      chart-repo-url: { get_input: chart-repo-url }
      chart-version: { get_input: chart-version }
      namespace: { get_input: namespace }
      stable-repo-url: { get_input: stable-repo-url}
      config-url:  { get_input: config-url}
      config-format: { get_input: config-format}
    relationships:
      - type: cloudify.relationships.connected_to
        target: onap_env
outputs:
  dcaecomponent_install_status:
    value: { get_attribute: [ dcaecomponent, install-status ] }


Pre-Configuration Steps

  1. Helm needs to be installed on the CM pod            


kubectl exec -n onap <Cloudify Manager pod> /bin/bash

wget http://storage.googleapis.com/kubernetes-helm/helm-v2.9.1-linux-amd64.tar.gz
tar -zxvf helm-v2.9.1-linux-amd64.tar.gz
sudo mv linux-amd64/helm /usr/local/bin/helm

    2.  Tiller service should be updated to expose a nodeport

kubectl edit svc -n kube-system tiller-deploy -o yaml
# Assign an unused nodeport available in cluster

#After update K8S svc definition should reflect the node port assigned
#verify node port assignment 

kubectl get svc --all-namespaces | grep tiller
kube-system   tiller-deploy             ClusterIP      10.43.218.97   <none>                                44134/TCP                       5d



Installation


  1. Modify the blueprint templates 
    kubectl exec -it -n onap <dcae-bootstrap pod> /bin/bash
cd blueprints
ls k8s-helm.yaml k8s-helm-override.yaml
# Helm Blueprint templates are available under this directory
# Verify and update the blueprint parameters if required 
# Create a corresponding input files

    Note: Explanation of parameters are documented under CCSDK wiki page : Introduction of Helm Plugin.

  2. Validate and Upload the blueprint into CM
    cfy blueprints validate  
cfy blueprints upload -b k8s-helm-test /blueprints/k8s-helm.yaml
  3. Deploy the blueprint
    cfy deployments create -b k8s-helm-test k8s-helm-test
cfy executions start -d k8s-helm-test install
  4. Validation
    # Verify if new NS identified in blueprint configuration is created
kubectl get ns

# Verify if required component was deployed 
kubectl get pods -n <ns specified>

Future Enhancement

  • Support Tiller clusterIP/port as option instead of nodeport alone for tiller.
  • Support deployment on existing names spaces
  • Logging enhancements (deployment errors if any to be captured also)



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