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Getting started with the roxctl CLI | roxctl CLI | Red Hat Advanced Cluster Security for Kubernetes 4.0
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Getting started with the roxctl CLI

Installing the roxctl CLI

You can install the roxctl CLI by downloading the binary or you can run the roxctl CLI from a container image.

Installing the roxctl CLI by downloading the binary

You can install the roxctl CLI to interact with Red Hat Advanced Cluster Security for Kubernetes from a command-line interface. You can install roxctl on Linux, Windows, or macOS.

Installing the roxctl CLI on Linux

You can install the roxctl CLI binary on Linux by using the following procedure.

Procedure

  1. Download the latest version of the roxctl CLI:

    $ curl -O https://mirror.openshift.com/pub/rhacs/assets/4.0.5/bin/Linux/roxctl

  2. Make the roxctl binary executable:

    $ chmod +x roxctl

  3. Place the roxctl binary in a directory that is on your PATH:

    To check your PATH, execute the following command:

    $ echo $PATH
Verification

  • Verify the roxctl version you have installed:

    $ roxctl version

Installing the roxctl CLI on macOS

You can install the roxctl CLI binary on macOS by using the following procedure.

Procedure

  1. Download the latest version of the roxctl CLI:

    $ curl -O https://mirror.openshift.com/pub/rhacs/assets/4.0.5/bin/Darwin/roxctl

  2. Remove all extended attributes from the binary:

    $ xattr -c roxctl

  3. Make the roxctl binary executable:

    $ chmod +x roxctl

  4. Place the roxctl binary in a directory that is on your PATH:

    To check your PATH, execute the following command:

    $ echo $PATH
Verification

  • Verify the roxctl version you have installed:

    $ roxctl version

Installing the roxctl CLI on Windows

You can install the roxctl CLI binary on Windows by using the following procedure.

Procedure

  • Download the latest version of the roxctl CLI:

    $ curl -O https://mirror.openshift.com/pub/rhacs/assets/4.0.5/bin/Windows/roxctl.exe
Verification

  • Verify the roxctl version you have installed:

    $ roxctl version

Running the roxctl CLI from a container

The roxctl client is the default entry point in Red Hat Advanced Cluster Security for Kubernetes roxctl image. To run the roxctl client in a container image:

Prerequisites

  • You must first generate an authentication token from the RHACS portal.

Procedure

  1. Log in to the registry.redhat.io registry.

    $ docker login registry.redhat.io

  2. Pull the latest container image for the roxctl CLI.

    $ docker pull registry.redhat.io/advanced-cluster-security/rhacs-roxctl-rhel8:4.0.5

After you install the CLI, you can run it by using the following command:

$ docker run -e ROX_API_TOKEN=$ROX_API_TOKEN \
  -it registry.redhat.io/advanced-cluster-security/rhacs-roxctl-rhel8:4.0.5 \
  -e $ROX_CENTRAL_ADDRESS <command>

In Red Hat Advanced Cluster Security Cloud service, when using roxctl commands that require the Central address, use the Central instance address as displayed in the Instance Details section of the Red Hat Hybrid Cloud Console. For example, use acs-ABCD12345.acs.rhcloud.com instead of acs-data-ABCD12345.acs.rhcloud.com.
Verification

  • Verify the roxctl version you have installed.

    $ docker run -it registry.redhat.io/advanced-cluster-security/rhacs-roxctl-rhel8:4.0.5 version

Authenticating using the roxctl CLI

For authentication, you can use an authentication token or your administrator password. Use an authentication token in a production environment because each token is assigned specific access control permissions.

Creating an API token

Procedure

  1. In the RHACS portal, navigate to Platform Configuration → Integrations.

  2. Scroll to the Authentication Tokens category, and then click API Token.

  3. Click Generate Token.

  4. Enter a name for the token and select a role that provides the required level of access (for example, Continuous Integration or Sensor Creator).

  5. Click Generate.

    Copy the generated token and securely store it. You will not be able to view it again.

Exporting and saving the authentication token

Procedure

  1. After you have generated the authentication token, export it as the ROX_API_TOKEN variable by entering the following command:

    $ export ROX_API_TOKEN=<api_token>

  2. (Optional): You can also save the token in a file and use it with the --token-file option by entering the following command:

    $ roxctl central debug dump --token-file <token_file>

Note the following guidelines:

  • You cannot use both the -password (-p) and the --token-file options simultaneously.

  • If you have already set the ROX_API_TOKEN variable, and specify the --token-file option, the roxctl CLI uses the specified token file for authentication.

  • If you have already set the ROX_API_TOKEN variable, and specify the --password option, the roxctl CLI uses the specified password for authentication.

Using the roxctl CLI

Review the following sections to learn how to complete common tasks using the CLI.

  • Export the following variables before using these commands:

    $ export ROX_API_TOKEN=<api_token>
    $ export ROX_CENTRAL_ADDRESS=<address>:<port_number>

  • You can use the --help option to get more information about the commands.

  • In Red Hat Advanced Cluster Security Cloud service, when using roxctl commands that require the Central address, use the Central instance address as displayed in the Instance Details section of the Red Hat Hybrid Cloud Console. For example, use acs-ABCD12345.acs.rhcloud.com instead of acs-data-ABCD12345.acs.rhcloud.com.

Managing Central’s database

Central stores information about:

  • Activity observed in your clusters,

  • Information retrieved from integrated image registries or scanners, and

  • Red Hat Advanced Cluster Security for Kubernetes configuration.

You can back up and restore Central’s database by using the roxctl CLI.

Backing up Central database

Run the following command to back up Central’s database:

$ roxctl -e "$ROX_CENTRAL_ADDRESS" central backup

Restoring Central database

Run the following command to restore Central’s database:

$ roxctl -e "$ROX_CENTRAL_ADDRESS" central db restore <backup_filename>

Managing secured clusters

To secure a Kubernetes or an OpenShift Container Platform cluster, you must deploy Red Hat Advanced Cluster Security for Kubernetes services into the cluster. You can generate deployment files in the RHACS portal by navigating to the Platform Configuration → Clusters view, or you can use the roxctl CLI.

Generating Sensor deployment files

Kubernetes
$ roxctl -e "$ROX_CENTRAL_ADDRESS" sensor generate k8s --name <cluster_name> --central "$ROX_CENTRAL_ADDRESS"
OpenShift Container Platform
$ roxctl -e "$ROX_CENTRAL_ADDRESS" sensor generate openshift --openshift-version <ocp-version> --name <cluster_name> --central "$ROX_CENTRAL_ADDRESS" (1)
1 For the --openshift-version option specify the major OpenShift Container Platform version number for your cluster. For example, specify 3 for OpenShift Container Platform version 3.x and specify 4 for OpenShift Container Platform version 4.x.

Read the --help output to see other options that you might need to use depending on your system architecture.

Verify that the endpoint you provide for --central can be reached from the cluster where you are deploying Red Hat Advanced Cluster Security for Kubernetes services.

If you are using a non-gRPC capable load balancer, such as HAProxy, AWS Application Load Balancer (ALB), or AWS Elastic Load Balancing (ELB):

  • Use the WebSocket Secure (wss) protocol. To use wss, prefix the address with wss://, and

  • Add the port number after the address, for example:

    $ roxctl sensor generate k8s --central wss://stackrox-central.example.com:443

Installing Sensor by using the generate YAML files

When you generate the Sensor deployment files, roxctl creates a directory called sensor-<cluster_name> in your working directory. The script to install Sensor is present in this directory. Run the sensor installation script to install Sensor.

$ ./sensor-<cluster_name>/sensor.sh

If you get a warning that you do not have the required permissions to install Sensor, follow the on-screen instructions, or contact your cluster administrator for help.

Downloading Sensor bundle for existing clusters

Use the following command to download Sensor bundles for existing clusters by specifying a cluster name or ID.

$ roxctl sensor get-bundle <cluster_name_or_id>

Deleting cluster integration

$ roxctl -e "$ROX_CENTRAL_ADDRESS" cluster delete --name=<cluster_name>

Deleting cluster integration will not remove Red Hat Advanced Cluster Security for Kubernetes services running in the cluster. You can remove them by running the delete-sensor.sh script from the Sensor installation bundle.

Checking policy compliance

You can use the roxctl CLI to check deployment YAML files and images for policy compliance.

Configuring output format

When you check policy compliance by using the deployment check, image check, or image scan commands, you can specify the output format by using the -o option. This option determines how the output of a command is displayed in the terminal.

You can change the output format by adding the -o option to the command and specifying the format as json, table, csv, or junit.

For example, the following command checks a deployment and then displays the result in csv format:

$ roxctl -e "$ROX_CENTRAL_ADDRESS" \
  deployment check --file =<yaml_filename> \
  -o csv

When you do not specify the -o option for the output format, the following default behavior is used:

  • The format for the deployment check and the image check commands is table.

  • The default output format for the image scan command is json. This is the old JSON format output for compatibility with older versions of the CLI. To get the output in the new JSON format, specify the option with format, as -o json.

Different options are available to configure the output. The following table lists the options and the format in which they are available.

Option Description Formats

--compact-output

Use this option to display the JSON output in a compact format.

json

--headers

Use this option to specify custom headers.

table and csv

--no-header

Use this option to omit the header row from the output.

table and csv

--row-jsonpath-expressions

Use this option to specify GJSON paths to select specific items from the output. For example, to get the Policy name and Severity for a deployment check, use the following command:

$ roxctl -e "$ROX_CENTRAL_ADDRESS" \
  deployment check --file=<yaml_filename> \
  -o table --headers POLICY-NAME,SEVERITY \
  --row-jsonpath-expressions="{results.#.violatedPolicies.#.name,results.#.violatedPolicies.#.severity}"

table and csv

--merge-output

Use this options to merge table cells that have the same value.

table

headers-as-comment

Use this option to include the header row as a comment in the output.

csv

--junit-suite-name

Use this option to specify the name of the JUnit test suite.

junit

Checking deployment YAML files

The following command checks build-time and deploy-time violations of your security policies in YAML deployment files. Use this command to validate:

  • Configuration options in a YAML file, such as resource limits or privilege options; or

  • Aspects of the images used in a YAML file, such as components or vulnerabilities.

$ roxctl -e "$ROX_CENTRAL_ADDRESS" deployment check --file=<yaml_filename>

Checking images

The following command checks build-time violations of your security policies in images.

$ roxctl -e "$ROX_CENTRAL_ADDRESS" image check --image=<image_name>

Checking image scan results

You can also check the scan results for specific images.

The following command returns the components and vulnerabilities found in the image in JSON format. The format is defined in the API reference.

$ roxctl -e "$ROX_CENTRAL_ADDRESS" image scan --image <image_name>

To cause Red Hat Advanced Cluster Security for Kubernetes to re-pull image metadata and image scan results from the associated registry and scanner, add the --force option.

To check specific image scan results, you must have a token with both read and write permissions for the Image resource. The default Continuous Integration system role already has the required permissions.

Debugging issues

Managing Central log level

Central saves information to its container logs.

Viewing the logs

You can see the container logs for Central by running:

Kubernetes
$ kubectl logs -n stackrox <central_pod>
OpenShift Container Platform
$ oc logs -n stackrox <central_pod>
Viewing current log level

You can change the log level to see more or less information in Central logs. Run the following command to view the current log level:

$ roxctl -e "$ROX_CENTRAL_ADDRESS" central debug log
Changing the log level

Run the following command to change the log level:

$ roxctl -e "$ROX_CENTRAL_ADDRESS" central debug log --level=<log_level> (1)
1 The acceptable values for <log_level> are Panic, Fatal, Error, Warn, Info, and Debug.

Retrieving debugging information

To gather debugging information for investigating issues, run the following command:

$ roxctl -e "$ROX_CENTRAL_ADDRESS" central debug dump

Generating build-time network policies

The build-time network policy generator is included in the roxctl CLI. For the build-time network policy generation feature, roxctl CLI does not need to communicate with RHACS Central so you can use it in any development environment.

Prerequisites

  1. The build-time network policy generator recursively scans the directory you specify when you run the command. Therefore, before you run the command, you must already have service manifests, config maps, and workload manifests such as Pod, Deployment, ReplicaSet, Job, DaemonSet, and StatefulSet as YAML files in the specified directory.

  2. Verify that you can apply these YAML files as-is using the kubectl apply -f command. The build-time network policy generator does not work with files that use Helm style templating.

  3. Verify that the service network addresses are not hard-coded. Every workload that needs to connect to a service must specify the service network address as a variable. You can specify this variable by using the workload’s resource environment variable or in a config map.

  4. service network addresses must match the following official regular expression pattern:

    (http(s)?://)?<svc>(.<ns>(.svc.cluster.local)?)?(:<portNum>)? (1)
    1 In this pattern,

    • <svc> is the service name.

    • <ns> is the namespace where you defined the service.

    • <portNum> is the exposed service port number.

    Following are some examples that match the pattern:

    • wordpress-mysql:3306

    • redis-follower.redis.svc.cluster.local:6379

    • redis-leader.redis

    • http://rating-service.

Procedure

  1. Verify that the build-time network policy generation feature is available by running the help command:

    $ roxctl generate netpol -h

  2. Generate the policies by using the generate netpol command:

    $ roxctl generate netpol <folder-path> (1)
    1 Specify the path of the folder that has the Kubernetes manifests.

The roxctl generate netpol command supports the following options:

Option

Description

-h, --help

View the help text for the netpol command.

-d, --output-dir <dir>

Save the generated policies into a target folder. One file per policy.

-f, --output-file <filename>

Save and merge the generated policies into a single YAML file.

--fail

Fail on the first encountered error. The default value is false.

--remove

Remove the output path if it already exist.

--strict

Treat warnings as errors. The default value is false.
Additional resources