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📙 You will learn

How to check Kubernetes permissions for ThreadFix and how to install ThreadFix as a less privileged user.

Prerequisites

Audience: IT Professional
Difficulty: Basic
Time needed: Approximately 10 minutes
Tools required: N/A

The default installation of ThreadFix on Kubernetes requires 'cluster-admin' or equivalent privileges.

ThreadFix Helm Resources

When installing ThreadFix via helm, the following resources are used:

• clusterrole*

• clusterrolebinding*

• configmap

• customresourcedefinition**

• deployment

• ingress

• job

• networkpolicy

• persistentvolumeclaim

• poddisruptionbudget

• role

• rolebinding

• secret

• service

• serviceaccount

• statefulset

* These resources are optional.

** This resource can be installed by a separate user.

Checking Permissions with Script

The easiest way to check Kubernetes permissions for ThreadFix is use the check-k8s-permissions.sh script above.

1. Download the check-k8s-permissions.sh script linked above.
   

2. Set the namespace to be used for ThreadFix (replace <namespace> with the appropriate value).

   Code Block
   TF_NAMESPACE=<namespace>

3. Execute the script.

   Code Block
   bash ./check-k8s-permissions.sh -n $TF_NAMESPACE

4. Review the output of the script and take any corrective actions recommended.

Manually Checking Permissions

Alternatively, access to create these resources can be manually checked with the 'can-i' function of Kubernetes. For example, to check if the current user has permission to create a 'clusterrole' resource, run the following:

kubectl auth can-i create clusterroles

The command will return 'yes' if the current user has sufficient permissions or 'no' if the current user does not have sufficient permissions to create the named resource. Perform the 'can-i' for each of the resources listed above.

If the command returns 'no' for 'clusterrole' and 'clusterrolebinding', follow the Installing without ClusterRole and ClusterRoleBinding Permissions guide . If the command returns 'no' for 'customerresourcedefinition', an administrator may apply these resources by following the Pre-Installing Custom Resource Definitions Guide section. If CustomResourceDefinitions cannot be applied, ThreadFix cannot be installed

If any of the other resources return ‘no’, the user will not be able to install ThreadFix.