Adding powerdns k8s proxy charm and descriptors

# PowerDNS NS

Descriptors that installs a PowerDNS chart from "https://gatici.github.io/helm-repo/" repo.

There is one VNF (powerdns_knf) with only one KDU.

There is one NS that connects the VNF to a mgmt network

## Download Packages

```bash

git clone https://osm.etsi.org/gitlab/vnf-onboarding/osm-packages.git

cd osm-packages/Hackfest_Demos/OSM-MR13/powerdns

```

## Create the VIM Account

```bash

# This is dummy vim account

export VIM_ACCOUNT=k8s-vim

osm vim-create --name $VIM_ACCOUNT \

               --account_type dummy \

               --user dummy \

                --password dummy \

                --auth_url "http://dummy" \

                --tenant dummy

```

## Add K8s Cluster

```bash

# kubeconfig.yaml exists in the HOME directory

export k8s_net=<K8s cluster network>  # osm-ext

osm k8scluster-add --creds ~/kubeconfig.yaml \

                     --vim k8s-vim \

                     --k8s-nets "{k8s_net: $k8s_net}" \

                     --version 1.24  \

                     k8s-cluster

```

## Add Helm Repository

```bash

osm repo-add --type helm-chart --description "Repository for Powerdns helm Chart" osm-helm https://gatici.github.io/helm-repo/

```

## Build the charm

```bash

# Install charmcraft

sudo snap install charmcraft --classic

pushd powerdns_knf/charms/ops/powerdns-operator

# Pack charm

charmcraft pack

# Copy charm under VNFD/charms folder

cp powerdns-operator_ubuntu-20.04-amd64.charm  ../../

popd

```

## Onboarding and instantiation

```bash

export VNF_NAME=powerdns

export KDU_NAME=powerdns

# Define the NS name

export NS_NAME=<ns name>

```

```bash

osm nfpkg-create powerdns_knf

osm nspkg-create powerdns_ns

osm ns-create --ns_name $NS_NAME --nsd_name powerdns_ns --vim_account $VIM_ACCOUNT --config "{vld: [ {name: mgmtnet, vim-network-name: $k8s_net}]}"

# Check NS status

osm ns list

```

## Test Day2 Actions: add-zone, add-domain

```bash

# Add Zone Action

# Define zone such as "example.org."

ZONE=<zone> 

OP_ID=`osm ns-action --action_name add-zone --vnf_name $VNF_NAME --kdu_name $KDU_NAME --params "{"zone_name": $ZONE}" $NS_NAME`

# Check operation status

osm ns-op-show $OP_ID

# Add Domain Action

# Define domain such as "test."

DOMAIN=<domain> 

# Define ip such as "192.168.2.32"

IP=<ip>

OP_ID=`osm ns-action --action_name add-domain --vnf_name $VNF_NAME --kdu_name $KDU_NAME  --params "{'zone_name': $ZONE, 'subdomain': $DOMAIN, 'ip': $IP}" $NS_NAME`

# Check operation status

osm ns-op-show $OP_ID

```

## Testing PowerDNS server

```bash

VNF_ID=`osm vnf-list --ns $NS_NAME | grep powerdns | awk '{print $2}'`

export DNS_IP=`osm vnf-show $VNF_ID --literal | yq -e '.kdur[0].services[] | select(.name | endswith("-tcp")) | .external_ip' | tr -d \"[]' '`

RECORD=<domain><zone> 

# Sample record: "test.example.org"

dig @${DNS_IP} +tcp $RECORD

```

## Test Day2 Actions: delete-domain, delete-zone

```bash

# Delete Domain

OP_ID=`osm ns-action --action_name delete-domain --vnf_name $VNF_NAME --kdu_name $KDU_NAME  --params "{'zone_name': $ZONE, 'subdomain': $DOMAIN}" $NS_NAME`

osm ns-op-show $OP_ID

dig @${DNS_IP} +tcp ${RECORD}

# Delete Zone

OP_ID=`osm ns-action --action_name delete-zone --vnf_name $KDU_NAME --kdu_name $KDU_NAME  --params "{'zone_name': $ZONE}" $NS_NAME`

osm ns-op-show $OP_ID

```

## Upgrade Operation: Scale Out

```bash

OP_ID=`osm ns-action --action_name upgrade --vnf_name $VNF_NAME  --kdu_name $KDU_NAME --params "{'replicaCount':'3',}" $NS_NAME`

osm ns-op-show $OP_ID --literal | yq .operationState

osm vnf-show $VNF_ID --kdu $KDU_NAME | yq .config.replicaCount

```

## Rollback Operation: Scale In

```bash

OP_ID=`osm ns-action --action_name rollback --vnf_name $VNF_NAME --kdu_name $KDU_NAME $NS_NAME`

osm ns-op-show $OP_ID --literal | yq .operationState

osm vnf-show $VNF_ID --kdu $KDU_NAME | yq .config.replicaCount 

```

# Patterns to ignore when building packages.

# This supports shell glob matching, relative path matching, and

# negation (prefixed with !). Only one pattern per line.

.DS_Store

# Common VCS dirs

.git/

.gitignore

.bzr/

.bzrignore

.hg/

.hgignore

.svn/

# Common backup files

*.swp

*.bak

*.tmp

*~

# Various IDEs

.project

.idea/

*.tmproj

.vscode/

dependencies:

- name: postgresql

  repository: https://charts.bitnami.com/bitnami

  version: 10.16.2

- name: mariadb

  repository: https://charts.bitnami.com/bitnami

  version: 10.5.1

digest: sha256:8e15bb90e2a9a3b72069761791da93dee17fecca2fdfa74562ce2541bab15282

generated: "2022-05-19T17:36:07.359537847Z"

apiVersion: v2

appVersion: v4.3.1

dependencies:

- condition: postgresql.enabled

  name: postgresql

  repository: https://charts.bitnami.com/bitnami

  version: 10.16.2

- condition: mariadb.enabled

  name: mariadb

  repository: https://charts.bitnami.com/bitnami

  version: 10.5.1

deprecated: true

description: PowerDNS is a DNS server, written in C++ and licensed under the GPL. It runs on most Unix derivatives. PowerDNS features a large number of different backends ranging from simple BIND style zonefiles to relational databases and load balancing/failover algorithms. A DNS recursor is provided as a separate program.

home: https://github.com/k8s-at-home/charts/tree/master/charts/stable/powerdns

icon: https://avatars.githubusercontent.com/u/1282630?s=200&v=4

name: powerdns

sources:

- http://www.github.com/PowerDNS/

version: 5.0.0