# fenix.tools

This directory contains tools and instructions to test Fenix workflows.
Currently OPNFV Doctor has been used to test OpenStack related workflows.
As Doctor is at the moment only for OpenStack and Fenix itself needs a way to be
tested, the Kubernetes workflow (fenix/workflow/workflows/k8s.py) testing
is implemented here.

Files:

- 'demo-ha.yaml': demo-ha ReplicaSet to make 2 anti-affinity PODS.
- 'demo-nonha.yaml': demo-nonha ReplicaSet to make n nonha PODS.
- 'vnfm.py': VNFM to test k8s.py workflow.

## Kubernetes workflow (k8s.py)

First version of workflow towards Kubernetes use cases.

### Requirements for testing

This workflow assumes ReplicaSet used for PODs. A Kubernetes cluster with
1 master and at least 3 workers are required for testing. Master node needs
DevStack to have Fenix and OpenStack services it still uses. Later on there
can be a version of Fenix not needing Keystone and AODH event alarming, but
using native Kubernetes services for RBAC and events.

As in Doctor testing, there is a pair of anti-affinity PODs (demo-ha) and rest
of the worker node capacity is filled with (demo-nonha) PODs. Scaling of PODs
is done via ReplicaSet number of replicas. Idea is that each POD is taking
("number of worker node CPUs" - 2) / 2. That will make sure scheduler fits
2 PODs on each node and 2 CPUs capacity is assumed for other node services.
This should require at least 6 CPUs for each node to work.

### Install Kubernetes cluster with 1 Manager and 3 Worker nodes.

Here is instructions:
https://docs.openstack.org/openstack-helm/latest/install/kubernetes-gate.html
https://phoenixnap.com/kb/how-to-install-kubernetes-on-a-bare-metal-server
https://phoenixnap.com/kb/how-to-install-kubernetes-on-centos

### On Manager node, install DevStack including Fenix and its minimum services

Note! There is no conflict with Kubernetes as limiting to only Fenix needed
services.

Clone DevStack. Tested to work with latest stable release Train.

```sh
git clone https://github.com/openstack/devstack -b stable/train
```

Make local.conf. 'HOST_IP' should be the master node IP.

```sh
cd devstack vi local.conf
```
```sh
[[local|localrc]]
GIT_BASE=https://git.openstack.org
HOST_IP=192.0.2.4
ADMIN_PASSWORD=admin
DATABASE_PASSWORD=admin
RABBIT_PASSWORD=admin
SERVICE_PASSWORD=admin
LOGFILE=/opt/stack/stack.sh.log

PUBLIC_INTERFACE=eth0

CEILOMETER_EVENT_ALARM=True

ENABLED_SERVICES=key,rabbit,mysql,fenix-engine,fenix-api,aodh-evaluator,aodh-notifier,aodh-api

enable_plugin ceilometer https://git.openstack.org/openstack/ceilometer stable/train
enable_plugin aodh https://git.openstack.org/openstack/aodh stable/train
enable_plugin gnocchi https://github.com/openstack/gnocchi
enable_plugin fenix https://opendev.org/x/fenix master
```

Deploy needed OpenStack services with Fenix

```sh
./stack.sh
```

Now you should have Kubernetes cluster and Fenix via DevStack. Any hacking of
Fenix can be done under '/opt/stack/fenix'.

### Running test

Use 3 terminal windows (Term1, Term2 and Term3) to test Fenix with Kubernetes
kluster. Under here is what you can run in different terminals. Terminals
should be running in master node. Here is short description:

- Term1: Used for logging Fenix
- Term2: Infrastructure admin commands
- Term3: VNFM logging for testing and setting up the VNF

#### Term1: Fenix-engine logging

If any changes to Fenix make them under '/opt/stack/fenix'; restart Fenix and
see logs

```sh
sudo systemctl restart devstack@fenix*;sudo journalctl -f --unit devstack@fenix-engine
```

API logs can also be seen

```sh
sudo journalctl -f --unit devstack@fenix-api
```

Debugging and other configuration changes to '.conf' files under '/etc/fenix'

#### Term2: Infrastructure admin window

Use DevStack admin as user. Set your variables needed accordingly

```sh
. ~/devstack/operc admin admin
USER_ID=`openstack user list | grep admin | awk '{print $2}'`
HOST=192.0.2.4
PORT=12347
```

Authenticate to Keystone as admin user before calling Fenix. If you will have
some not authorized error later on, you need to do this again.

```sh
OS_AUTH_TOKEN=`openstack token issue | grep " id " |awk '{print $4}'`
```

After you have first: Fenix running in Term1; Next: VNF created a in Term3
Next: VNFM running in Term3, you can create maintenance session utilizing those

```sh
DATE=`date -d "+15 sec" "+%Y-%m-%d %H:%M:%S"`;MSESSION=`curl -g -i -X POST http://$HOST:$PORT/v1/maintenance -H "Accept: application/json" -H "Content-Type: application/json" -d '{"workflow": "k8s", "state": "MAINTENANCE","metadata": {} ,"maintenance_at": "'"$DATE"'"}' -H "X-Auth-Token: $OS_AUTH_TOKEN" -H "X-User-Id: $USER_ID" | grep session_id | jq -r '.session_id'`
```

After maintenance workflow is 'MAINTENANCE_DONE', you should first press
"ctrl + c" in VNFM window (Term3), so it removes constraints from Fenix and
dies. Then you can remove the finished session from Fenix

```sh
curl -g -i -X DELETE http://$HOST:$PORT/v1/maintenance/$MSESSION -H "Accept: application/json" -H "Content-Type: application/json" -H "X-Auth-Token: $OS_AUTH_TOKEN" -H "X-User-Id: $USER_ID"
```
If maintenance run till the end with 'MAINTENANCE_DONE', you are ready to run it
again if you wish. 'MAINTENANCE_FAILED' or in case of exceptions, you should
recover system before trying to test again. This is covered in Term3 below.

#### Term3: VNFM (fenix/tools/vnfm.py)

Use DevStack admin as user.

```sh
. ~/devstack/operc admin admin
```

Go to Fenix Kubernetes tool directory for testing

```sh
cd /opt/stack/fenix/fenix/tools
```

Create demo namespace (we use demo namespace and demo user and project in
Keystone)

```sh
kubectl create namespace demo
```

Start VNFM (when done in this order, we make sure demo-ha has nodes for anti-affinity):

```sh
kubectl apply -f demo-ha.yaml --namespace=demo;sleep 1;kubectl apply -f demo-nonha.yaml  --namespace=demo
```

Note you should modify above yaml files so that "cpu:" has value of
'(workernode.status.capacity["cpu"] - 2) / 2'. Default is expecting that there
is 32 cpus, so value is "15" in both yaml files. Replicas can be changed in
demo-nonha.yaml. Minimum 2 (if minimum of 3 worker nodes) to maximum
'(amount_of_worker_nodes-1)*2'. Greater amount means more scaling needed and
longer maintenance window as less parallel actions possible. Surely constraints
in vnfm.py also can be changed for different behavior.

You can delete pods used like this

```sh
kubectl delete replicaset.apps demo-ha demo-nonha --namespace=demo
```

Start Kubernetes VNFM that we need for testing

```sh
python vnfm.py
```

Now you can start maintenance session in Term2. When workflow failed or
completed; you first kill vnfm.py with "ctrl+c" and delete maintenance session
in Term2.

If workflow failed something might need to be manually fixed. Here you
uncordon your 3 worker nodes, if maintenance workflow did not run to the end.

```sh
kubectl uncordon worker-node3 worker-node2 worker-node1
```

You can check your pods matches to amount of replicas mentioned in
demo-nonha.yaml and demo-ha.yaml:

```sh
kubectl get pods --all-namespaces --output=wide
```

If not matching, delete and create again as easiest solution

```sh
kubectl delete replicaset.apps demo-ha demo-nonha --namespace=demo;sleep 15;kubectl apply -f demo-ha.yaml --namespace=demo;sleep 1;kubectl apply -f demo-nonha.yaml  --namespace=demo
```

## OpenStack workflows (default.py and nvf.py)

OpenStack workflows can be tested by using OPNFV Doctor project for testing.
Workflows:

- default.py is the first example workflow with VNFM interaction.
- nvf.py is enhanced Telco workflow that utilizes the ETSI FEAT03 constraints.
  This workflow can optimize parallel nodes and migrations according to
  ETSI constraints.

### Requirements for testing

- Multinode DevStack environment with 1 controller and at least 3 computes.
- Each compute needs to have at least 2 VCPUs
- DevStack local.conf for controller node need Fenix enabled. Also Heat, AODH and
  Ceilometer are needed. VCPUs needs one to one to mapping to CPU.

Example controller baremetal local.conf:

```sh
[[local|localrc]]
GIT_BASE=https://git.openstack.org
HOST_IP=192.168.173.3
ADMIN_PASSWORD=admin
DATABASE_PASSWORD=admin
RABBIT_PASSWORD=admin
SERVICE_PASSWORD=admin
LOGFILE=/opt/stack/stack.sh.log

#USE_PYTHON3=True
#PYTHON3_VERSION=3.6

## Neutron options
Q_USE_SECGROUP=True
FLOATING_RANGE="192.168.37.0/24"
#FLOATING_RANGE="192.168.38.0/24"
IPV4_ADDRS_SAFE_TO_USE="10.0.0.0/22"
Q_FLOATING_ALLOCATION_POOL=start=192.168.37.200,end=192.168.37.220
#Q_FLOATING_ALLOCATION_POOL=start=192.168.38.200,end=192.168.38.220
PUBLIC_NETWORK_GATEWAY="192.168.37.199"
#This is wrong, but if right devstack deletes the host ip
PUBLIC_INTERFACE=enp3s0f1

# Open vSwitch provider networking configuration
Q_USE_PROVIDERNET_FOR_PUBLIC=True
OVS_PHYSICAL_BRIDGE=br-ex
PUBLIC_BRIDGE=br-ex
OVS_BRIDGE_MAPPINGS=public:br-ex
MULTI_HOST=1

CEILOMETER_EVENT_ALARM=True

disable_service ceilometer-alarm-notifier,ceilometer-alarm-evaluator,ceilometer-acompute
enable_service aodh-evaluator,aodh-notifier,aodh-api

enable_plugin heat https://git.openstack.org/openstack/heat stable/train
enable_plugin ceilometer https://git.openstack.org/openstack/ceilometer stable/train
enable_plugin aodh https://git.openstack.org/openstack/aodh stable/train
enable_plugin gnocchi https://github.com/openstack/gnocchi
enable_plugin fenix https://opendev.org/x/fenix master
enable_service fenix-engine
enable_service fenix-api

disable_service n-cpu

[[post-config|$NOVA_CONF]]
[DEFAULT]
cpu_allocation_ratio = 1.0
allow_resize_to_same_host = False
```

### Workflow default.py

On controller node clone Doctor to be able to test. Doctor currently requires
Python 3.6:

```sh
git clone https://gerrit.opnfv.org/gerrit/doctor
```

```sh
export INSTALLER_TYPE=devstack
export ADMIN_TOOL_TYPE=fenix
export TEST_CASE=maintenance
```
Use DevStack admin as user.

```sh
. ~/devstack/operc admin admin
```

Goto Doctor and start testing

```sh
cd doctor
sudo -E tox -e py36
```

Use journalctl to track the progress in Fenix

```sh
sudo journalctl -f --unit devstack@fenix-engine
```

If any changes to Fenix make them under '/opt/stack/fenix' and restart Fenix

```sh
sudo systemctl restart devstack@fenix*
```

You can also make changed to Doctor before running Doctor test

### Workflow vnf.py

This workflow differs from above as it expects ETSI FEAT03 constraints.
In Doctor testing it means we also need to use different application manager (VNFM)

Where default.py worklow used the sample.py application manager vnf.py
workflow uses vnfm.py workflow (doctor/doctor_tests/app_manager/vnfm.py)

Only change to testing is that you should export variable to use different
application manager.

```sh
export APP_MANAGER_TYPE=vnfm
```

If again want to use default.py, you can export the default value for
application manager

```sh
export APP_MANAGER_TYPE=sample
```
Doctor modifies the message where it calls maintenance accordingly to use
either 'default' or 'nfv' as workflow in Fenix side