CNFs CWC¶

Overview¶

The Cloud-Native Network Functions (CNFs) Cluster Wide Controller (CWC) enables CNFs’s software licensing and billing capabilities. Once the CNFs software is installed and licensed, the CWC collects and reports software usage telemetry statistics based on the number of CNFs CRs used by the licensed BIG-IP Controller instances in the cluster. CNFs uses F5’s flexible consumption software licensing model, billing only for the CNFs features used.

_images/spk_info.png Note: CNFs Licensing applies to the cluster level, and is performed prior to installing the BIG-IP Controller instances.

This document guides you through installing the CWC controller.

CPCL module¶

The CWC contains the Common Product Component and Libraries (CPCL) module that helps with license activation, and with generating and maintaining the monthly license reports. The CPCL requires these two important licensing objects:

A JWKS (JSON Web Key Set) that must be installed prior to installing the CWC Pod. The JWKS can be downloaded and installed using the Install the JWKS procedure.
A JWT (JSON Web Token) that is associated with your unique CAT (Customer Association Token). The JWT can be obtained from your MyF5 account and will be installed using the Install the CWC procedure.

Installing the CWC Pod is demonstrated in this overview, and licensing the cluster will demonstrated in the CNFs Licensing overview.

CPCL modes¶

The CPCL module supports two licensing modes:

disconnected - When the CWC does not have access to the internet, each licensing task must be performed manually.
connected - When the CWC has access the internet, it can automatically perform each of the licensing tasks.

The CWC configurations required to enable each mode are available in the Procedures section of this document.

Cluster namespace¶

The CWC Pod can install to any cluster namespace. In this document, the CWC will install to the cnf-telemetry namespace. As mentioned previously, CWC licensing applies to the entire cluster, not a single namespace (namespace).

RabbitMQ¶

The CWC and BIG-IP Controller Pod communicate through the RabbitMQ open source message broker to determine the cluster licensing status. Ensure connectivity is permitted for the service ports listed in the sections below.

CWC Service¶

After installing the CWC, a CWC Service object is created that receives REST API data on TCP service port 30881, and forwards the data to the CWC Pod on TCP service port 3.0.7. Ensure the Service ports are available, and the cluster has CoreDNS enabled. In this example, the CNFs components will need to resolve the f5-cnf-cwc.cnf-telemetry DNS hostname.

Name:              f5-cnf-cwc
Namespace:         cnf-telemetry
IP:                10.109.102.215
Port:              cwc-rest  30881/TCP
Endpoints:         10.244.1.75:3.0.7

RabbitMQ Service¶

After installing the RabbitMQ Pod, a RabbitMQ Service object is created, to pass messages between the BIG-IP Controllers and the CWC on TCP service port 5671. Ensure the Service port is available, and the cluster’s core DNS is enabled. In this example, the CNFs components will need to resolve the rabbitmq-server.cnf-telemetry hostname.

Name:              rabbitmq-server
Namespace:         cnf-telemetry
IP:                10.109.105.210
Port:              ampqst  5671/TCP
Endpoints:         10.244.1.80:5671

CWC capabilities¶

The CWC supports the following capabilities:

Licensing. Refer to the CNFs Licensing guide for more information.
Debugging. Refer to the Debug API guide for more information.

Requirements¶

Ensure you have:

Installed the CNFs software.
Installed the CNFs Cert Manager.
A Linux workstation with Helm, OpenSSL and make installed.
Obtained the CPCL SSL/TLS key and the JWT from your MyF5 account.

Procedures¶

Create API certificates¶

Use this procedure to create the SSL/TLS certificates required to authenticate the CWC REST API when using CWC in disconnected mode.

Change into the directory containing the latest CNFs Software, and obtain the f5-cert-gen utility version:

In this example, the CNF files are in the cnfinstall directory:
```
cd cnfinstall
```
```
ls -1 tar | grep cert-gen
```
The example output should appear similar to the following:
```
f5-cert-gen-0.7.3.tgz
```

Extract the cert-gen utility:

tar xvf tar/<helm-chart>.tgz

For example:

tar xvf tar/f5-cert-gen-0.7.3.tgz

Create a new namespace for the CWC and Rabbit Pods using the following command syntax:

Note: A new namespace is not required, and used only for easier Pod management.
```
kubectl create ns <namespace>
```
For example:
```
kubectl create ns cnf-telemetry
```
Generate the SSL/TLS certificates and Secret for the CWC REST API:

Note: The certificates will be referenced in the Configure Postman section of the CNFs Licensing guide.
```
sh cert-gen/gen_cert.sh -s=api-server -a=f5-cnf-cwc.<namespace> -n=1
```
In this example, the CWC installs to the cnf-telemetry namespace.
```
sh cert-gen/gen_cert.sh -s=api-server -a=f5-cnf-cwc.cnf-telemetry -n=1
```
The command output indicates the Secret has been created:
```
Generating /path/cwc-license-certs.yaml
```
Install the CWC REST API Secret:

In this example, the CWC installs to the cnf-telemetry Project.
```
kubectl apply -f cwc-license-certs.yaml -n cnf-telemetry
```
The command output indicates the Secret was created successfully:
```
secret/cwc-license-certs created
```
Continue to the next procedure.

Install RabbitMQ¶

Use these steps to install the RabbitMQ Pod.

While in the directory with the CNFs Software files, obtain the rabbitmq Helm chart version:
```
ls -1 tar | grep rabbitmq
```
The example output should appear similar to the following:
```
rabbitmq-3.0.6.tgz
```
To pull the RabbitMQ software image from the local software registry, create a rabbitmq-values.yaml file, and set the image.repository parameter:
```
image:
  repository: "local.registry.com"
```

Install the RabbitMQ Pod using the following command syntax:

helm install <release> tar/<helm-chart>.tgz \
-f <values>.yaml -n <namespace>

For example:

helm install cnf-rabbit tar/rabbitmq-3.0.6.tgz \
-f rabbitmq-values.yaml -n cnf-telemetry

Verify the RabbitMQ Pod STATUS:

kubectl get pods -n cnf-telemetry

In this example, the RabbitMQ Pod STATUS is Running.

NAME                         READY   STATUS  
f5-rabbit-5688f9c8c7-f7d9d   1/1     Running 

Continue to the next section.

Install the JWKS¶

Use these steps to download and install the JWKS ConfigMap.

Download the JWKS cpcl-key-cm (key) ConfigMap here.
Install the JWKS cpcl-key-cm ConfigMap:

In this example, the ConfigMap installs to the cnf-telemetry namespace:
```
kubectl apply -f cpcl-key.yaml -n cnf-telemetry
```
Continue to either the Install CWC - connected or the Install CWC - disconnected procedure.

Install CWC - connected¶

Use these steps to install the CWC Pod using connected mode.

_images/spk_warn.png Important: Ensure the CWC Pod has access to the product.apis.f5.com licensing server over TCP service port 443.

While in the directory with the CNFs software files, obtain the cwc Helm chart version:
```
ls -1 tar | grep cwc
```
The example output should appear similar to the following:
```
cwc-3.0.10.tgz
```
To pull the CWC software image from the local software registry, create a cwc-values.yaml file, and set the image.repository parameter:
```
image:
  repository: "local.registry.com"
```
Set the rabbitmqNamespace parameter to the CWC namespace in the cwc-values.yaml file:
```
rabbitmqNamespace: "cnf-telemetry"
```

To automatically obtain the cluster license from the F5 license server, add the F5 provided JWT to the jwt parameter in the cwc-values.yaml file:

Note: The jwt value “eyJhbGciOiJSUzUxMiIsInR5cCI6” has been shortened for readability.

cpclConfig:
  operationMode: "connected"
  jwt: "eyJhbGciOiJSUzUxMiIsInR5cCI6"
  teemCertUrl: "https://product.apis.f5.com/ee/v1/entitlements/telemetry"
  teemEntitlementUrl: "https://product.apis.f5.com/ee/v1/entitlements/telemetry"
  teemInitialConfigUrl: "https://product.apis.f5.com/ee/v1/entitlements/telemetry"
  friendlyName: "CNF Cluster"

service:
  name: f5-cnf-cwc

Install the CWC Pod using the following command syntax:

helm install <release> tar/<helm-chart>.tgz \
-f <values>.yaml -n <namespace>

For example:

helm install cnf-cwc tar/cwc-3.0.10.tgz \
-f cwc-values.yaml -n cnf-telemetry

Verify the STATUS of the CWC Pod:

kubectl get pods -n cnf-telemetry 

In this example, the CWC Pod STATUS is Running.

NAME                         READY   STATUS  
f5-rabbit-5688f9c8c7-lv49b   1/1     Running 
f5-cnf-cwc-94bcd64bd-42xdc   1/1     Running 

Continue to the Next steps section.

Install CWC - disconnected¶

Use these steps to install the CWC Pod using disconnected mode.

While in the directory with the CNFs software files, obtain the cwc Helm chart version:
```
ls -1 tar | grep cwc
```
The example output should appear similar to the following:
```
cwc-3.0.10.tgz
```
To pull the CWC software image from the local software registry, create a cwc-values.yaml file, and set the image.repository parameter:
```
image:
  repository: "local.registry.com"
```
Set the rabbitmqNamespace parameter to the CWC namespace in the cwc-values.yaml file:
```
rabbitmqNamespace: "cnf-telemetry"
```

Set the friendlyName and service parameters to the following values:

cpclConfig:
  friendlyName: "CNF Cluster"

service:
  name: f5-cnf-cwc

Install the CWC Pod using the following command syntax. Ensure you configure the cpclConfig.jwt parameter to the reference the JWT:

helm install <release> tar/<helm-chart>.tgz -f <values>.yaml \
--set cpclConfig.jwt=<jwt-string> -n <namespace>

In this example, the JWT string eyJhbGciOiJSUzUxMiIsInR5cCI6 has been truncated for readability

helm install cnf-cwc tar/cwc-3.0.10.tgz -f cwc-values.yaml \
--set cpclConfig.jwt=eyJhbGciOiJSUzUxMiIsInR5cCI6 -n cnf-telemetry

Verify the STATUS of the CWC Pod:

kubectl get pods -n cnf-telemetry 

In this example, the CWC Pod STATUS is Running.

NAME                         READY   STATUS 
f5-rabbit-5688f9c8c7-lv49b   1/1     Running 
f5-cnf-cwc-94bcd64bd-42xdc   1/1     Running

Continue to the Next steps section.

Next steps¶

If the CPCL is running in connected mode, continue to the CNFs Licensing guide to license the cluster.
If the CPCL is running in disconnected mode, continue to the CNFs Licensing guide to license the cluster.

Feedback¶

Provide feedback to improve this document by emailing cnfdocs@f5.com.

Supplemental¶

RabbitMQ

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