kubernetesbestpractices.md

Kubernetes best practices

org.openrewrite.kubernetes.KubernetesBestPractices

Applies best practices to Kubernetes manifests.

Tags

• kubernetes

Source

GitHub, Issue Tracker, Maven Central

• groupId: org.openrewrite.recipe
• artifactId: rewrite-kubernetes
• version: 2.0.1

Usage

This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-kubernetes:2.0.1 in your build file or by running a shell command (in which case no build changes are needed): {% tabs %} {% tab title="Gradle" %} {% code title="build.gradle" %}

plugins {
    id("org.openrewrite.rewrite") version("6.1.4")
}

rewrite {
    activeRecipe("org.openrewrite.kubernetes.KubernetesBestPractices")
}

repositories {
    mavenCentral()
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-kubernetes:2.0.1")
}

{% endcode %} {% endtab %} {% tab title="Maven POM" %} {% code title="pom.xml" %}

<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.openrewrite.maven</groupId>
        <artifactId>rewrite-maven-plugin</artifactId>
        <version>5.2.4</version>
        <configuration>
          <activeRecipes>
            <recipe>org.openrewrite.kubernetes.KubernetesBestPractices</recipe>
          </activeRecipes>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>org.openrewrite.recipe</groupId>
            <artifactId>rewrite-kubernetes</artifactId>
            <version>2.0.1</version>
          </dependency>
        </dependencies>
      </plugin>
    </plugins>
  </build>
</project>

{% endcode %} {% endtab %}

{% tab title="Maven Command Line" %} {% code title="shell" %} You will need to have Maven installed on your machine before you can run the following command.

mvn -U org.openrewrite.maven:rewrite-maven-plugin:run \
  -Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-kubernetes:RELEASE \
  -Drewrite.activeRecipes=org.openrewrite.kubernetes.KubernetesBestPractices

{% endcode %} {% endtab %} {% endtabs %}

Definition

{% tabs %} {% tab title="Recipe List" %}

• Ensure liveness probe is configured
• Ensure readiness probe is configured
• Ensure CPU request is set
• Ensure CPU limits are set
• Ensure memory request is set
• Ensure memory limits are set
• No privileged containers
• Ensure lifecycle rule on StorageBucket
• No host process ID sharing
• No host IPC sharing
• No root containers
• Ensure image pull policy is Always
• No privilege escalation
• No host network sharing
• Read-only root filesystem
• Limit root capabilities in a container

{% endtab %}

{% tab title="Yaml Recipe List" %}

---
type: specs.openrewrite.org/v1beta/recipe
name: org.openrewrite.kubernetes.KubernetesBestPractices
displayName: Kubernetes best practices
description: Applies best practices to Kubernetes manifests.
tags:
  - kubernetes
recipeList:
  - org.openrewrite.kubernetes.MissingPodLivenessProbe
  - org.openrewrite.kubernetes.MissingPodReadinessProbe
  - org.openrewrite.kubernetes.MissingCpuRequest
  - org.openrewrite.kubernetes.MissingCpuLimits
  - org.openrewrite.kubernetes.MissingMemoryRequest
  - org.openrewrite.kubernetes.MissingMemoryLimits
  - org.openrewrite.kubernetes.NoPrivilegedContainers
  - org.openrewrite.kubernetes.LifecycleRuleOnStorageBucket
  - org.openrewrite.kubernetes.NoHostProcessIdSharing
  - org.openrewrite.kubernetes.NoHostIPCSharing
  - org.openrewrite.kubernetes.NoRootContainers
  - org.openrewrite.kubernetes.ImagePullPolicyAlways
  - org.openrewrite.kubernetes.NoPrivilegeEscalation
  - org.openrewrite.kubernetes.NoHostNetworkSharing
  - org.openrewrite.kubernetes.ReadOnlyRootFilesystem
  - org.openrewrite.kubernetes.LimitContainerCapabilities

{% endtab %} {% endtabs %}

Contributors

• Jonathan Schneider
• Jon Brisbin
• Aaron Gershman
• Tyler Van Gorder
• Knut Wannheden
• Jon Brisbin

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