Configuration Parameters¶

All of the configuration parameters below are global.

General¶

Parameter	Type	Required	Default	Description	Allowed Values	Agent
http-listen-address	string	Optional	“0.0.0.0:8080”	Address at which to serve HTTP-based information (for example, `/metrics`, `health`) to Prometheus		Both AS3 and CCCL
log-level	string	Optional	INFO	Log level	INFO, DEBUG, CRITICAL, WARNING, ERROR	Both AS3 and CCCL
node-poll-interval	integer	Optional	30	In seconds, the interval at which the CIS polls the cluster to find all node members.		Both AS3 and CCCL
python-basedir	string	Optional	/app/python	Path to the python utilities directory		CCCL
schema-db-base-dir	string	Optional	file:///app/vendor/src/f5/schemas	Path to the directory containing the F5 schema db		CCCL
verify-interval	integer	n/a	30	In seconds, the interval at which the CIS verifies that the BIG-IP configuration matches the state of the orchestration system. This value is not currently configurable		For CCCL, LTM and NET For AS3, only NET
vs-snat-pool-name	string	Optional	n/a	Name of the SNAT pool that all virtual servers will reference. If it is not set, virtual servers use automap SNAT.		CCCL
–agent	string	Optional	AS3	You can also change the value to `CCCL` for CCCL mode.	AS3, CCCL	Both AS3 and CCCL
version	boolean	Optional	false	Print CIS version		Both AS3 and CCCL

Note

The python-basedir setting lets you specify the path to an alternate python agent that can bridge between the CIS and F5 CCCL.
The time it takes for the CIS to reapply the system configurations to the BIG-IP device is normally low (a few ms) and won’t cause service disruption.
Use vs-snat-pool-name if you want virtual servers to reference a SNAT pool that already exists in the /Common partition on the BIG-IP device. See Overview of SNAT features on AskF5 for more information.

BIG-IP system¶

Parameter	Type	Required	Default	Description	Agent
bigip-partition	string	Required	n/a	The BIG-IP partition in which to configure objects.	Both AS3 and CCCL
bigip-password	string	Required	n/a	BIG-IP iControl REST password You can secure your BIG-IP credentials using a Kubernetes Secret.	Both AS3 and CCCL
bigip-url	string	Required	n/a	BIG-IP admin IP address	Both AS3 and CCCL
bigip-username	string	Required	n/a	BIG-IP iControl REST username The BIG-IP user account must have the appropriate role defined: For `nodeport` type pool members, the role must be `Administrator`. For `cluster` type pool members, the role must be `Administrator`.	Both AS3 and CCCL
credentials-directory	string	Optional	n/a	Directory that contains the BIG-IP username, password, or url files	Both AS3 and CCCL

Important

The credentials-directory option is an alternative to using the bigip-username, bigip-password, or bigip-url arguments.

When you use this argument, the controller looks for three files in the specified directory:

“username”, “password”, and “url”

If any of these files do not exist, the controller falls back to using the CLI arguments as parameters.

Each file should contain only the username, password, and url, respectively. You can create and mount the files as Kubernetes Secrets.

It is important to not project the Secret keys to specific paths, as the controller looks for the “username”, “password”, and “url” files directly within the credentials directory.

See example-bigip-credentials-directory.yaml for a deployment example.

VXLAN¶

Parameter	Type	Required	Default	Description	Allowed Values	Agent
openshift-sdn-name	string	Optional	n/a	Name of the VXLAN tunnel on the BIG-IP system that corresponds to an Openshift SDN HostSubnet. Only applicable in OpenShift.		Both AS3 and CCCL
flannel-name	string	Optional	n/a	Name of the VXLAN tunnel on the BIG-IP system that corresponds to a Flannel subnet.		CCCL

Parameter

Type

Required

Default

Description

Allowed Values

Agent

openshift-sdn-name

string

Optional

n/a

Name of the VXLAN tunnel on the BIG-IP system that corresponds to an Openshift SDN HostSubnet.

Only applicable in OpenShift.

Both AS3 and CCCL

flannel-name

string

Optional

n/a

Name of the VXLAN tunnel on the BIG-IP system that corresponds to a Flannel subnet.

CCCL

Kubernetes¶

Parameter	Type	Required	Default	Description	Allowed Values	Agent
default-ingress-ip	string	Optional	n/a	The controller configures a virtual server at this IP address for all Ingresses with the annotation: `virtual-server.f5.com/ip: 'controller-default'`		Both AS3 and CCCL
kubeconfig	string	Optional	./config	Path to the kubeconfig file		Both AS3 and CCCL
manage-configmaps	boolean	Optional	true	Tells the controller whether or not to watch Kubernetes ConfigMaps and apply their configuration. If false, the controller will ignore ConfigMap events.	true, false	Both AS3 and CCCL
namespace	string	Optional	All	Kubernetes namespace(s) to watch may be a comma-separated list watches all namespaces by default		Both AS3 and CCCL
namespace-label	string	Optional	n/a	Tells the `k8s-bigip-ctlr` to watch any namespace with this label		Both AS3 and CCCL
node-label-selector	string	Optional	n/a	Tells the `k8s-bigip-ctlr` to watch only nodes with this label		Both AS3 and CCCL
pool-member-type	string	Optional	nodeport	The type of BIG-IP pool members you want to create. Use `cluster` to create pool members for each of the endpoints for the Service (the pod’s InternalIP) Use `nodeport` to create pool members for each schedulable node using the Service’s NodePort.	cluster, nodeport	Both AS3 and CCCL
resolve-ingress-names	string	Optional	n/a	Tells the controller to resolve the first Host in an Ingress resource to an IP address. This IP address will be used as the virtual server address for the Ingress resource. A value of “LOOKUP” will use local DNS to resolve the Host. Any other value is a custom DNS server and the controller sends resolution queries through that server instead. Specifying the flag with no argument will default to LOOKUP.		Not Supported
running-in-cluster	boolean	Optional	true	Indicates whether or not a kubernetes cluster started `k8s-bigip-ctlr`	true, false	Both AS3 and CCCL
use-node-internal	boolean	Optional	true	filter Kubernetes InternalIP addresses for pool members	true, false	Both AS3 and CCCL
use-secrets	boolean	Optional	true	Tells the controller whether or not to load SSL profiles from Kubernetes Secrets for Ingresses and ConfigMaps. If false, the controller will only use profiles from the BIG-IP system.	true, false	Both AS3 and CCCL
manage-ingress	boolean	Optional	true	Tells the controller whether or not to watch Kubernetes ingress and apply their configuration. If false, the controller will ignore ingress events.	true, false	Both AS3 and CCCL
manage-ingress-class- only	boolean	Optional	true	Process all ingress resources without `kubernetes.io/ingress.class` + “annotation and ingresses with annotation `kubernetes.io/ingress.class=f5`”.	true, false	AS3
ingress-class	string	Optional	F5	A class of the Ingress controller. The Ingress controller only processes Ingress resources that belong to its class–i.e. have the annotation `kubernetes.io/ingress.class` equal to the class. Additionally, the Ingress controller processes Ingress resources that do not have that annotation, which can be disabled by setting the `-manage-ingress-class-only` flag.	true, false	AS3

Note

Use the node-label-selector parameter if you only want the controller to manage specific nodes from the cluster. For example, the BIG-IP device may not be able to reach certain nodes, or the BIG-IP device already manages certain nodes. Therefore, the controller should only watch the nodes that match the environmental constraints (by using a label).

OpenShift Routes¶

The following configuration parameters only apply to OpenShift.

Parameter	Type	Required	Default	Description	Allowed Values	Agent
custom-client-ssl	string	Optional	n/a	Specifies the name of a custom client SSL profile attached to the route HTTPS virtual server and used as default for SNI. This profile must have the Default for SNI field enabled.		CCCL
custom-server-ssl	string	Optional	n/a	Specifies the name of a custom server SSL profile attached to the route HTTPS virtual server and used as default for SNI. This profile must have the Default for SNI field enabled.		CCCL
manage-routes	boolean	Optional	false	Indicates if `k8s-bigip-ctlr` should handle OpenShift Route objects.	true, false	Both AS3 and CCCL
route-http-vserver	string	Optional	ose-vserver	The name of the http virtual server for OpenShift Routes.		Both AS3 and CCCL
route-https-vserver	string	Optional	https-ose-vserver	The name of the https virtual server for OpenShift Routes.		Both AS3 and CCCL
route-label	string	Optional	n/a	Tells the `k8s-bigip-ctlr` to only watch for OpenShift Route objects with the `f5type` label set to this value.		Both AS3 and CCCL
route-vserver-addr	string	Optional	n/a	Bind address for virtual server for OpenShift Route objects.		Both AS3 and CCCL
default-client-ssl	string	Optional	n/a	Name of the default client ssl profile.		Both AS3 and CCCL
default-server-ssl	string	Optional	n/a	Name of the default server ssl profile.		Both AS3 and CCCL
tls-version	string	Optional	1.2	Configures TLS version to be enabled on BIG-IP. TLS 1.3 is only supported on TMOS version 14.0+.		Only AS3
cipher-group	string	Optional	n/a	Configures a cipher group in BIG-IP and reference it here. Cipher group and ciphers are mutually exclusive, only use one.		Only AS3
ciphers	string	Optional	n/a	Configures a ciphersuite selection string. Cipher-group and ciphers are mutually exclusive, only use one.		Only AS3

Note

If the custom-client-ssl or custom-server-ssl parameters are not provided, then the controller creates default clientssl and serverssl profiles for the OpenShift Route HTTPS virtual server. The controller sets these profiles as Default for SNI.

AS3 Parameters¶

Parameter	Type	Required	Default	Description
as3-validation	boolean	Optional	true	When set to false, this disables AS3 template validation on the controller.
insecure	boolean	Optional	false	When set to true, this enables insecure SSL communication to the BIG-IP system.
trusted-certs-cfgmap	string	Required	n/a	When certificates are provided, adds them to controller’s trusted certificate store.
as3-post-delay	int	Optional	n/a	Specifies the time, in seconds, that CIS waits to post the available AS3 declaration.
log-as3-response	boolean	Optional	false	When set to true, adds the body of AS3 API response in Controller logs.
override-as3- declaration	string	Optional	n/a	Provide Namespace and Name of the ConfigMap as <namespace>/<configmap-name>. The JSON key/values from this ConfigMap will oerride key/values from internally generated AS3 declaration.
filter-tenants	boolean	Optional	false	Specifies whether or not the use tenant filtering API for AS3 declaration.

CIS Health Checks¶

Kubernetes has two types of health checks:

Readiness Probes: To determine when a pod is ready
Liveness Probes: To determine when a pod is healthy or unhealthy after it has become ready

Readiness Probes Kubernetes uses readiness probes to decide when the container is available for accepting traffic. The readiness probe controls which pods to use as the backend for a service. A pod is considered ready when all of its containers are ready. If a pod is not ready, it is removed from service load balancers. For example, if a container loads a large cache at start-up and takes minutes to start, you should not send requests to this container until it is ready, or the requests will fail. Instead, route requests to other pods, which are capable of servicing requests.

Liveness Probes Kubernetes uses liveness probes to know when to restart a container. If a container is unresponsive, the application could be deadlocked due to a multi-threading defect. Restarting the container can make the application more available.

These are the methods you can use to check container status:

HTTP request to the pod
Command execution to the pod
TCP request to the pod

Probes are defined on a container in a deployment.

Here is an example of the deployment using HTTP method:

Parameter	Description
periodSeconds	specifies that the kubelet should perform a liveness probe every 3 seconds.
initialDelaySeconds	tells the kubelet that it should wait 3 seconds before performing the first probe
timeOutSeconds	how long to wait for the probe to finish. If this time is exceeded, OpenShift Container Platform considers the probe to have failed.

The kubelet uses a web hook to determine the healthiness of the container. The check is successful if the HTTP response code is between 200 and 399.

To perform a probe, the kubelet sends an HTTP GET request to the server that is running in the Container and listening on port 8080. The handler for the server’s /health path returns a success code. For example:

livenessProbe:
   failureThreshold: 3
   httpGet:
      path: /health
      port: 8080
      scheme: HTTP
   initialDelaySeconds: 15
   periodSeconds: 15
   successThreshold: 1
   timeoutSeconds: 15
readinessProbe:
   failureThreshold: 3
   httpGet:
      path: /health
      port: 8080
      scheme: HTTP
   initialDelaySeconds: 30
   periodSeconds: 30
   successThreshold: 1
   timeoutSeconds: 15

To view the liveness and readiness of the deployed pod, run the command Kubectl describe pod <pod_name> -n kube-system. Here is the example output:

        resources: {}
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        - --log-level=debug
        terminationMessagePolicy: Fileermination-log
      --log-level=debug
      --namespace=default
      --route-label=systest
      --insecure=true
      --agent=cccl
   Liveness:      http-get http://:8080/health delay=15s timeout=15s period=15s #success=1 #failure=3
   Readiness:     http-get http://:8080/health delay=30s timeout=15s period=30s #success=1 #failure=3
   Environment:   <none>
   Mounts:        <none>
Volumes:          <none>

curl http://<self-ip>:<port no>/health shows a response of OK.

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