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SUSE Rancher, RKE, K3s, Sysdig Secure DevOps Platform

Sysdig Secure DevOps Platform with SUSE Rancher

Getting Started Guide

This document provides a brief introduction to Sysdig Secure DevOps Platform with SUSE Rancher.

Disclaimer: Documents published as part of the series SUSE Technical Reference Documentation have been contributed voluntarily by SUSE employees and third parties. They are meant to serve as examples of how particular actions can be performed. They have been compiled with utmost attention to detail. However, this does not guarantee complete accuracy. SUSE cannot verify that actions described in these documents do what is claimed or whether actions described have unintended consequences. SUSE LLC, its affiliates, the authors, and the translators may not be held liable for possible errors or the consequences thereof.

Author: Samip Parikh, Solutions Architect, SUSE
Author: Manuel Boira Cuevas, Strategic Partners Solutions Architect, Sysdig
Publication Date: 2021-11-10

1 Introduction

1.1 Motivation

SUSE Rancher enables you to accelerate your digital transformation by unifying your cloud native application landscape, ensuring consistent operations and workload management from core to cloud to edge. Sysdig Secure DevOps Platform gives you enhanced visibility and is designed to enable DevOps teams simplify security in cloud native environments, from development through production.

Sysdig Secure DevOps Platform provides a number of capabilities to help you securely run your applications in your SUSE Rancher Kubernetes landscape:

  • Secure the build – Automate image scanning in CI/CD pipelines and registries, efficiently flag vulnerabilities and owners, and block risky images.

  • Detect and respond to threats – Identify threats across containers and cloud services and prevent intrusion and lateral movement. Respond quickly and conduct forensics using detailed activity audits.

  • Continuously validate cloud configurations and compliance – Identify misconfigurations and compliance violations, and measure progress with detailed reports. Save time with out-of-the-box policies for standards such as PCI, NIST, HIPAA, and SOC 2.

  • Monitor and troubleshoot infrastructure and services – Maximize performance and availability using Kubernetes and cloud monitoring with full Prometheus compatibility.

1.2 Scope

This guide will help you take the first steps to integrate SUSE Rancher with Sysdig Secure DevOps Platform.

1.3 Audience

This document is intended for DevOps and DevSecOps engineers, security professionals, and developers who are responsible for enabling security across containers, clusters, and clouds.

2 Technical overview

The capabilities of Sysdig Secure and Sysdig Monitoring for SUSE Rancher are enabled by deploying the Sysdig agent on the nodes of your cluster. Relevant data and metadata are collected and available in the Sysdig SaaS back-end and accessible via the Sysdig user interface (UI). The Sysdig UI also provides the ability to customize aspects like policies, alerts, visualizations, permissions, etc.

Minimum requirements:

  • A Sysdig cloud account. You can get started with a free trial by visiting https://sysdig.com/start-free.

  • A SUSE Rancher cluster with a RKE, K3s, or any CNCF-certified Kubernetes cluster. Clusters can be located on-premises or in the cloud. You can also begin with community Rancher.

  • Outbound Internet access (at least port 6443). This allows collected information to be sent to the Sysdig back-end.

You can find the prerequisites for the Sysdig agent install on Kubernetes in the Sysdig documentation.

3 Installation

Get started by installing the Sysdig agent in your cluster. You can do so by using the SUSE Rancher Apps & Marketplace or by installing manually.

3.1 Install from the SUSE Rancher Apps & Marketplace

  1. From the top-left Rancher menu select Apps & Marketplace. From here, you will be taken to the Charts page.

    TRD Kubernetes ss sysdig gs image marketplace overview
  2. Locate and select Sysdig Monitor & Secure, which will automate installation of the Sysdig agent via the Sysdig Helm chart.

  3. Specify a namespace, such as sysdig.

  4. Provide the Sysdig access key.

    TRD Kubernetes ss sysdig gs image install 2
  5. Click Install. Once you initiate the Helm chart, within 15 minutes you should begin seeing data and activity in your Sysdig UI.

3.2 Install using generic/manual steps

To install the Sysdig agent using manual steps, follow the instructions in the Sysdig documentation.

4 Use case and demonstration

Sysdig Secure runtime security provides policy-driven detections, based on the Falco open-source project. Using predefined and custom policies, you can automate detection and alerting of suspicious and unexpected activity across containers, clusters, clouds.

In this example, you will create a custom runtime security policy that will detect when a shell is spawned in a container with a terminal attached. This can be practically useful, as commands executed with a terminal inside a container can be an indicator of an infiltration or attack.

Note
Note

For this example we are creating a simple custom rule that can be inhibited by other rules. We strongly recommend disallowing the predefined rule Suspicious Container Activity before adding the new rule (via Policies > Runtime Policies > Suspicious Container Activity).

After the experiment, reactivate the Suspicious Container Activity rule again.

4.1 Define and enable the customer runtime security policy

  1. Create the policy.

    1. Log into Sysdig Secure and, in the left panel, select Policies > Runtime Policies.

      TRD Kubernetes ss sysdig gs image select runtime

      This opens the Runtime Policies page, where you can see the predefined policies.

      TRD Kubernetes ss sysdig gs image Runtime Policies
    2. To create a custom policy, first select Add Policy in the upper right corner. Then, in the pop-up screen, select Workload Policy.

      TRD Kubernetes ss sysdig gs image choose policy
    3. In the New Policy screen, enter a name and a description.

      TRD Kubernetes ss sysdig gs image new policy name
      1. Keep the policy defaults: Enabled and a Severity level of High.

      2. You can customize the scope of this rule, indicating where it should apply. In this example, the scope is contained to a namespace, called terminal-shell-in-container. You can also set this to a broader scope, such as kubernetes.cluster.name, for example.

        TRD Kubernetes ss sysdig gs image policy scope
  2. Assign a rule to use with the policy.

    1. Select Import from Library.

      TRD Kubernetes ss sysdig gs image import
    2. Find and select Terminal shell in a container from the Rules Library, then click Import Rules.

      TRD Kubernetes ss sysdig gs image rules library
    3. You should now see the Terminal shell in a container rule assigned to your policy.

  3. Specify the desired actions when a policy is triggered under Actions in the UI.

    1. Choose to kill, stop, or pause the container.

      For this example, leave this set to Nothing.

      For more information about Actions, see the Sysdig documentation.

    2. Set your desired notification channel.

      The default notification channel is email, but you can configure additional options under Settings > Notification Channels. For example, notifications can also be sent to a Slack Channel. Alternatively, leave this field blank.

  4. Enable recording of system call data surrounding an event.

    1. Turn on Capture.

    2. Provide a file name.

    3. Choose the number of seconds before and after the event to record.

      For example, 10 seconds before, and 20 seconds after the event.

      TRD Kubernetes ss sysdig gs image capture config
  5. Create the policy by clicking Save.

4.2 Trigger a test event

You can trigger a test event to observe how Sysdig Secure detects the terminal shell in a container event and drill into the captured information to help you investigate the incident.

  1. Open a terminal shell from any container that is running in your SUSE Rancher cluster.

    1. Go to the Workloads section and access any pod with a running container.

      For this example, you can use the Sysdig agent pod.

      TRD Kubernetes ss sysdig gs image open terminal shell from rancher ui 1
    2. From the menu on the right, click the Execute Shell option, and a new terminal shell will be shown at the bottom of the screen.

      TRD Kubernetes ss sysdig gs image open terminal shell from rancher ui 2

This is sufficient for Sysdig to capture the event. You can type a few commands in the terminal to generate additional data that also will be captured by Sysdig Secure.

4.3 Viewing and investigating the event

Once the runtime security policy created above is triggered, you can view more information about the event in the Sysdig UI.

  1. Click Events.

    TRD Kubernetes ss sysdig gs image events
  2. Click the "Terminal shell in a container" entry to open and view additional information about the event.

    You can scroll through this panel to see information, such as:

    • Information about the policy and rule(s) triggered.

    • Details about where the activity took place in your cluster (Scope), including which container as well as the detected process (in this case, bash).

    • “Tags” that indicate violated compliance standards, etc.

      TRD Kubernetes ss sysdig gs image event details
  3. Dig deeper by clicking Respond at the top of this panel and selecting View Activity Audit.

    TRD Kubernetes ss sysdig gs image view audit

    In the Activity Audit screen you will find details about the incident, including commands issued, file activity, network activity, and kube-exec activity.

    TRD Kubernetes ss sysdig gs image activity audit
  4. Click any line item to see additional details, such as user, host, and scope.

    TRD Kubernetes ss sysdig gs image Kubernetes details
  5. Click Captures from the top of the Activity Audit page to explore the capture file created when the incident triggered.

    TRD Kubernetes ss sysdig gs image view capture 1
  6. Click the shovel icon to the right of the "Terminal shell in a container" capture file to open it with Sysdig Inspect.

    TRD Kubernetes ss sysdig gs image view capture 2
  7. In the new tab, you are presented with a set of tiles that categorize the available details within the capture file. You can select any of these tiles to identify where the activity is within the timeline and drag the bars at the bottom to narrow into a specific area within the file.

    TRD Kubernetes ss sysdig gs image Inspect
  8. Click one of the tiles, such as Executed Interactive Commands, to view further information about that particular activity and continue to drill down to investigate the incident.

    TRD Kubernetes ss sysdig gs image IO streams capture

5 Summary

Security and monitoring are critical capabilities required to ensure uninterrupted operation and provide protection for applications and data running in your Kubernetes landscape.

Sysdig Secure DevOps Platform with SUSE Rancher enables you to embed security into your DevOps workflows, from build through production. With powerful automation to enhance Kubernetes and container security, you can quickly identify threats and reduce your risk profile.

6 Additional resources

Learn more about the capabilities of Sysdig Secure DevOps Platform with SUSE Rancher with these additional references.

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