Kubernetes Cluster Events and Audit Log Analysis with Humio

Question

Pulumi · Accepted Answer

In order to perform Kubernetes Cluster Events and Audit Log Analysis with Humio, you would typically set up the necessary infrastructure to capture Kubernetes events and audit logs, and then stream or transfer them to Humio for analysis. This would involve configuring Kubernetes to emit the required logs, setting up a logging solution such as Fluentd or Fluent Bit to collect and forward the logs, and integrating with Humio's ingest APIs or using a Humio Kubernetes integration.

Pulumi does not have a direct integration with Humio as of my knowledge cutoff in early 2023. However, you can use Pulumi to set up and configure some of the underlying infrastructure needed for log collection and forwarding.

Below is a Pulumi program written in Python that would help you set up the necessary Kubernetes resources for event and audit log collection. This setup configures a `ClusterRole` and `ClusterRoleBinding` to give the necessary permissions to collect events from the Kubernetes API, sets up a `ConfigMap` with the configuration for a log forwarder, and deploys a `DaemonSet` for a log forwarder (like Fluentd) that will send logs to Humio. It does not include the specifics of Humio integration, as this would depend on Humio's API and any available client libraries or Fluentd plugins for Humio.

```python
import pulumi
import pulumi_kubernetes as k8s

# Assuming we have a pre-existing Kubernetes cluster context set up
# Name of the Kubernetes cluster to deploy the resources (replace with your actual cluster context)
kubeconfig_context = "my-kubeconfig-context"

# Initialize a Kubernetes provider with the desired context
k8s_provider = k8s.Provider("k8s-provider", kubeconfig_context=kubeconfig_context)

# Create a ClusterRole with permissions to access necessary resources for log collection
cluster_role = k8s.rbac.v1.ClusterRole(
    "log-collector-role",
    metadata={
        "name": "log-collector-role"
    },
    rules=[
        {
            "apiGroups": [""],
            "resources": ["events", "pods", "namespaces"],
            "verbs": ["get", "watch", "list"],
        },
        {
            "apiGroups": [""],
            "resources": ["pods/logs"],
            "verbs": ["get", "watch", "list"],
        },
    ],
    opts=pulumi.ResourceOptions(provider=k8s_provider)
)

# Bind the ClusterRole to a service account that the log forwarder pods will use
cluster_role_binding = k8s.rbac.v1.ClusterRoleBinding(
    "log-collector-binding",
    metadata={
        "name": "log-collector-binding"
    },
    subjects=[{
        "kind": "ServiceAccount",
        "name": "default", # Assuming the default service account, replace with a specific service account if necessary
        "namespace": "kube-system",
    }],
    role_ref={
        "kind": "ClusterRole",
        "name": "log-collector-role",
        "apiGroup": "rbac.authorization.k8s.io",
    },
    opts=pulumi.ResourceOptions(provider=k8s_provider)
)

# Create a ConfigMap with configuration for the log forwarder
# Replace the content with the actual config for your log forwarder and Humio integration
forwarder_config = k8s.core.v1.ConfigMap(
    "log-forwarder-config",
    metadata={
        "name": "log-forwarder-config",
    },
    data={
        "forwarder.conf": """
        # Configuration for log collection and forwarding to Humio
        # ...
        """,
    },
    opts=pulumi.ResourceOptions(provider=k8s_provider)
)

# Deploy a DaemonSet for the log forwarder
# This is an example using Fluentd; replace this with the actual image and config required for your setup
log_forwarder_daemonset = k8s.apps.v1.DaemonSet(
    "log-forwarder-daemonset",
    metadata={
        "name": "log-forwarder-daemonset",
        "namespace": "kube-system",
    },
    spec={
        "selector": {
            "matchLabels": {
                "name": "log-forwarder",
            },
        },
        "template": {
            "metadata": {
                "labels": {
                    "name": "log-forwarder",
                },
            },
            "spec": {
                "containers": [{
                    "name": "fluentd",
                    "image": "fluent/fluentd-kubernetes-daemonset:v1", # Replace with the correct Fluentd image for Humio
                    "volumeMounts": [{
                        "name": "config-volume",
                        "mountPath": "/etc/fluentd/conf.d", # Ensure this path matches your Fluentd configuration
                    }],
                }],
                "volumes": [{
                    "name": "config-volume",
                    "configMap": {
                        "name": "log-forwarder-config",
                    },
                }],
            },
        },
    },
    opts=pulumi.ResourceOptions(provider=k8s_provider)
)

# Export the DaemonSet name
pulumi.export("daemonset_name", log_forwarder_daemonset.metadata["name"])
```

This code is a starting point for setting up Kubernetes resources for log collection. For streaming logs to Humio, you will need to integrate with Humio's API or use a Humio plugin for your log forwarder (the configuration of which would go inside the `ConfigMap` for your forwarder deployment).

Remember to check Humio's documentation or contact their support for more specific guidance on integrating with their service. You will need to ensure you have the correct endpoint, API token, and any specific configuration required by Humio.