Orchestration Example

ONAP

The ​Open Network Automation Platform (ONAP) is an open-source software platform that enables the design, creation, and orchestration of networking services. ONAP was formed as a result of a ​merger of the Linux Foundation’s OPEN-Orchestrator (OPEN-O), and the AT&T ECOMP (Enhanced Control, Orchestration, Management and Policy) projects.

​ONAP architecture consists of two major architectural frameworks:

• design-time environment
• run-time environment

Both of these environments consist of a numerous separate subsystems.

This tutorial simplified deployment no Open Stack only Kubernties; 4 machines: controller and 3 workers Basic set of subsystems:

Prerequisites

In order to access the test bed, create a reservation and have it approved by the reservation service. Access to the resources are granted after the reservation is confirmed. Please follow the process shown on the COSMOS work flow page to get started.

Resources required

At least 2 nodes are needed to run this example - one node for the Kuberneties controller and one node for the worker.

Execution

— Running performant physical server cluster

For the purpose of orbit-lab, execute the below script on any of the console node in orbit as below: \\./create-kube-cluster.sh -c "cNode1 cNode2 … cNodeM" -w "wNode1 wNode2 … wNodeN"

create-kube-cluster.sh

#!/bin/bash

rm -f cluster.yml
rm -f kube_config_cluster.yml
rm -f rke
rm -f config

omf tell -t all -a offh
sleep 60

wget https://github.com/rancher/rke/releases/download/v0.2.1/rke_linux-amd64
mv rke_linux-amd64 rke
chmod 754 rke


usage () {
  echo "Usage:"
  echo "   ./$(basename $0) -c \"cNode1 cNode2 ... cnodeN\" -w \"wNode1 wnode2 ... wnodeN\""
  echo "Note: controllers hostnames and workers hostnames are to be enclosed in \"\""
  exit 0
}

if [[ ( $# == "--help") ||  $# == "-h" ]] 
        then 
                usage
                exit 0
fi 

if [ "$#" -lt 2 ]; then
  echo "Missing Kubernetes control and worker nodes"
  usage
fi

echo "# An example of an HA Kubernetes cluster for ONAP" >> cluster.yml
echo "nodes:" >> cluster.yml

while getopts c:w: option
do
case "${option}"
in
c) CONTROLLERS=${OPTARG};;
w) WORKERS=${OPTARG};;
esac
done

omf load -i latest-onap-control.ndz -t ${CONTROLLERS// /,} -r 60
sleep 300

omf load -i latest-onap-worker.ndz -t ${WORKERS// /,} -r 60
sleep 300

omf tell -a on -t ${CONTROLLERS// /,},${WORKERS// /,}
sleep 300

IFS=' ' read -ra C <<< "$CONTROLLERS"
IFS=' ' read -ra W <<< "$WORKERS"

echo "Testing node availability. This might take some time"
for i in "${C[@]}"; do
while ! ping -c 1 -n -w 1 $i &> /dev/null
do
    printf "%c" "."
done

echo "127.0.0.1 localhost" > hosts
echo "`ping $i -c 1 | grep "PING" | grep '('|awk '{gsub(/[()]/,""); print $3}'` ${i}" >> hosts
scp hosts root@$i:/etc/hosts
done

for i in "${W[@]}"; do
while ! ping -c 1 -n -w 1 $i &> /dev/null
do
    printf "%c" "."
done
echo "127.0.0.1 localhost" > hosts
echo "`ping $i -c 1 | grep "PING" | grep '('|awk '{gsub(/[()]/,""); print $3}'` ${i}" >> hosts
scp hosts root@$i:/etc/hosts
done
echo "Availability check successful"

for i in "${C[@]}"; do
   echo "- address: `ping $i -c 1 | grep "PING" | grep '('|awk '{gsub(/[()]/,""); print $3}'`" >> cluster.yml
   echo '  port: "22"' >> cluster.yml
   echo "  role:" >> cluster.yml
   echo "  - controlplane" >> cluster.yml
   echo "  - etcd" >> cluster.yml
   echo "  hostname_override: `ping $i -c 1 | grep 'PING' | awk '{print $2}' | awk -F . '{print $1}'`" >> cluster.yml
   echo "  user: root" >> cluster.yml
   echo "  ssh_key_path: '~/.ssh/id_rsa'" >> cluster.yml
done

echo "# worker nodes start " >> cluster.yml

for i in "${W[@]}"; do
   echo "- address: `ping $i -c 1 | grep "PING" | grep '('|awk '{gsub(/[()]/,""); print $3}'`" >> cluster.yml
   echo '  port: "22"' >> cluster.yml
   echo "  role:" >> cluster.yml
   echo "  - worker" >> cluster.yml
   echo "  hostname_override: `ping $i -c 1 | grep 'PING' | awk '{print $2}' | awk -F . '{print $1}'`" >> cluster.yml
   echo "  user: root" >> cluster.yml
   echo "  ssh_key_path: '~/.ssh/id_rsa'" >> cluster.yml
done

echo 'services:
  kube-api:
    service_cluster_ip_range: 10.43.0.0/16
    pod_security_policy: false
    always_pull_images: false
  kube-controller:
    cluster_cidr: 10.42.0.0/16
    service_cluster_ip_range: 10.43.0.0/16
  kubelet:
    cluster_domain: cluster.local
    cluster_dns_server: 10.43.0.10
    fail_swap_on: false
network:
  plugin: canal
authentication:
  strategy: x509
ssh_key_path: "~/.ssh/id_rsa"
ssh_agent_auth: false
authorization:
  mode: rbac
ignore_docker_version: false
kubernetes_version: "v1.13.5-rancher1-2"
private_registries:
- url: nexus3.onap.org:10001
  user: docker
  password: docker
  is_default: true
cluster_name: "onap"
restore:
  restore: false
  snapshot_name: ""' >> cluster.yml

./rke up

for i in "${C[@]}"; do
scp kube_config_cluster.yml root@$i:~/.kube/config
done

exit 0

Perform this on kubernetes control node:

1. Set the context of kubernetes to onap by default:

kubectl config set-context --current --namespace=onap

2. Verify the Kubernetes cluster:

kubectl get nodes -o=wide

3. Initialize Kubernetes Cluster for use by Helm

kubectl -n kube-system create serviceaccount tiller
kubectl create clusterrolebinding tiller --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
helm init --service-account tiller
kubectl -n kube-system  rollout status deploy/tiller-deploy

4. Set only the required ONAP component to true

cd overrides/
//edit the onap-all.yaml  file and set the ONAP components to false
nano onap-all.yaml

in our example mariadb and portal are turned on:

#
# 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.

###################################################################
# This override file enables helm charts for all ONAP applications.
###################################################################
cassandra:
  enabled: false
mariadb-galera:
  enabled: true

aaf:
  enabled: false
aai:
  enabled: false
appc:
  enabled: false
cds:
  enabled: false
clamp:
  enabled: false
cli:
  enabled: false
consul:
  enabled: false
contrib:
  enabled: false
dcaegen2:
  enabled: false
dmaap:
  enabled: false
esr:
  enabled: false
log:
  enabled: false
sniro-emulator:
  enabled: false
oof:
  enabled: false
msb:
  enabled: false
multicloud:
  enabled: false
nbi:
  enabled: false
policy:
  enabled: false
pomba:
  enabled: false
portal:
  enabled: true
robot:
  enabled: false
sdc:
  enabled: false
sdnc:
  enabled: false
so:
  enabled: false
uui:
  enabled: false
vfc:
  enabled: false
vid:
  enabled: false
vnfsdk:
  enabled: false
modeling:
  enabled: false

5. Start helm server and add local helm repository

// start server
helm serve &
//hit enter if the process is running to let the process run in background

// add repository
helm repo add local http://127.0.0.1:8879

6. Make onap helm charts available in local helm repository

cd ~/oom/kubernetes
make all; make onap

//This make command takes some time to finish

7. Deploy ONAP

helm deploy demo local/onap --namespace onap -f ~/overrides/onap-all.yaml

8. Verify the deploy

helm ls

— Openstack installed

— VM cloud image ubuntu 18.04-server-image