kubescape-host-scanner

packaged by Chainguard

Chainguard Container for kubescape-host-scanner

Kubernetes host-sensor project. The host information provider for Kubescape

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/kubescape-host-scanner:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

This image is a drop-in replacement for the upstream quay.io/kubescape/host-scanner image. Like upstream, the kube-host-sensor binary is installed at /usr/bin/kube-host-sensor and is the entrypoint, the working directory is /root, and the RELEASE environment variable is set (empty by default).

The image runs as root (UID 0) by default. The host scanner reads node-level information (kernel, kubelet, CNI, and security hardening settings) from the host filesystem, which is mounted at /host_fs, so it is normally deployed as a privileged DaemonSet with hostPID (and hostIPC) enabled.

The host scanner is built with Go and licensed under the Apache License 2.0.

Getting Started

Deploy the host scanner as a standalone privileged DaemonSet with access to the node filesystem. The following manifest is modeled on the upstream deployment/host-scanner.yaml:

apiVersion: v1
kind: Namespace
metadata:
  name: kubescape
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: host-scanner
  namespace: kubescape
  labels:
    app: host-scanner
spec:
  selector:
    matchLabels:
      name: host-scanner
  template:
    metadata:
      labels:
        name: host-scanner
    spec:
      tolerations:
        - operator: Exists
      hostPID: true
      hostIPC: true
      automountServiceAccountToken: false
      containers:
        - name: host-sensor
          image: cgr.dev/ORGANIZATION/kubescape-host-scanner:latest
          securityContext:
            privileged: true
            allowPrivilegeEscalation: true
            readOnlyRootFilesystem: true
          ports:
            - name: scanner
              containerPort: 7888
              protocol: TCP
          volumeMounts:
            - name: host-filesystem
              mountPath: /host_fs
          startupProbe:
            httpGet:
              path: /readyz
              port: 7888
            failureThreshold: 30
            periodSeconds: 1
          livenessProbe:
            httpGet:
              path: /healthz
              port: 7888
            periodSeconds: 10
      volumes:
        - name: host-filesystem
          hostPath:
            path: /
            type: Directory

Save the manifest as host-scanner.yaml and apply it:

kubectl apply -f host-scanner.yaml
kubectl -n kubescape rollout status daemonset/host-scanner

Once running, the host scanner serves its HTTP API on port 7888.

This image does not include a shell or curl, so you cannot query the API from inside the pod. Instead, forward the port to your workstation:

kubectl -n kubescape port-forward pod/<host-scanner-pod> 7888:7888

Then, in another terminal, query the API from your workstation:

curl -s http://localhost:7888/healthz
curl -s http://localhost:7888/kernelVersion
curl -s http://localhost:7888/CNIInfo
curl -s http://localhost:7888/linuxSecurityHardening

Alternatively, run the same curl commands against the pod IP from a host or pod that can reach it.

Configuration

• Port: 7888 (HTTP API). The upstream image does not declare EXPOSE.
• Host filesystem: mount the node root filesystem at /host_fs so the scanner can collect host information.

Documentation and Resources

• host-scanner Source Code
• Kubescape Documentation

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