feat(cis-1.24-microk8s): Add support to CIS-1.24 for microk8s distro

cfg/cis-1.24-microk8s/config.yaml

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+---
+## Version-specific settings that override the values in cfg/config.yaml

cfg/cis-1.24-microk8s/controlplane.yaml

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+---
+controls:
+version: "cis-1.24"
+id: 3
+text: "Control Plane Configuration"
+type: "controlplane"
+groups:
+  - id: 3.1
+    text: "Authentication and Authorization"
+    checks:
+      - id: 3.1.1
+        text: "Client certificate authentication should not be used for users (Manual)"
+        type: "manual"
+        remediation: |
+          Alternative mechanisms provided by Kubernetes such as the use of OIDC should be
+          implemented in place of client certificates.
+        scored: false
+
+  - id: 3.2
+    text: "Logging"
+    checks:
+      - id: 3.2.1
+        text: "Ensure that a minimal audit policy is created (Manual)"
+        audit: "cat $apiserverconf | grep -v grep"
+        tests:
+          test_items:
+            - flag: "--audit-policy-file"
+              set: true
+        remediation: |
+          Create an audit policy file for your cluster.
+        scored: false
+
+      - id: 3.2.2
+        text: "Ensure that the audit policy covers key security concerns (Manual)"
+        type: "manual"
+        remediation: |
+          Review the audit policy provided for the cluster and ensure that it covers
+          at least the following areas,
+          - Access to Secrets managed by the cluster. Care should be taken to only
+            log Metadata for requests to Secrets, ConfigMaps, and TokenReviews, in
+            order to avoid risk of logging sensitive data.
+          - Modification of Pod and Deployment objects.
+          - Use of `pods/exec`, `pods/portforward`, `pods/proxy` and `services/proxy`.
+          For most requests, minimally logging at the Metadata level is recommended
+          (the most basic level of logging).
+        scored: false

cfg/cis-1.24-microk8s/etcd.yaml

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+---
+controls:
+version: "cis-1.24"
+id: 2
+text: "Etcd Node Configuration"
+type: "etcd"
+groups:
+  - id: 2
+    text: "Etcd Node Configuration"
+    checks:
+      - id: 2.1
+        text: "Ensure that the --cert-file and --key-file arguments are set as appropriate (Automated)"
+        audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep"
+        tests:
+          bin_op: and
+          test_items:
+            - flag: "--cert-file"
+              env: "ETCD_CERT_FILE"
+            - flag: "--key-file"
+              env: "ETCD_KEY_FILE"
+        remediation: |
+          Not applicable. MicroK8s used dqlite and the communication to this service is done through a
+          local socket (/var/snap/microk8s/current/var/kubernetes/backend/kine.sock:12379) accessible
+          to users with root permissions.
+        scored: false
+
+      - id: 2.2
+        text: "Ensure that the --client-cert-auth argument is set to true (Automated)"
+        audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep"
+        tests:
+          test_items:
+            - flag: "--client-cert-auth"
+              env: "ETCD_CLIENT_CERT_AUTH"
+              compare:
+                op: eq
+                value: true
+        remediation: |
+          Not applicable. MicroK8s used dqlite and the communication to this service is done through a
+          local socket (/var/snap/microk8s/current/var/kubernetes/backend/kine.sock:12379) accessible
+          to users with root permissions.
+        scored: false
+
+      - id: 2.3
+        text: "Ensure that the --auto-tls argument is not set to true (Automated)"
+        audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep"
+        tests:
+          bin_op: or
+          test_items:
+            - flag: "--auto-tls"
+              env: "ETCD_AUTO_TLS"
+              set: false
+            - flag: "--auto-tls"
+              env: "ETCD_AUTO_TLS"
+              compare:
+                op: eq
+                value: false
+        remediation: |
+          Not applicable. MicroK8s used dqlite and the communication to this service is done through a
+          local socket (/var/snap/microk8s/current/var/kubernetes/backend/kine.sock:12379) accessible
+          to users with root permissions.
+        scored: false
+
+      - id: 2.4
+        text: "Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate (Automated)"
+        audit: "if test -e /var/snap/microk8s/current/var/kubernetes/backend/cluster.crt && test -e /var/snap/microk8s/current/var/kubernetes/backend/cluster.key; then echo 'certs-found'; fi"
+        tests:
+          test_items:
+            - flag: "certs-found"
+        remediation: |
+          The certificate pair for dqlite and tls peer communication is
+          /var/snap/microk8s/current/var/kubernetes/backend/cluster.crt and
+          /var/snap/microk8s/current/var/kubernetes/backend/cluster.key.
+        scored: true
+
+      - id: 2.5
+        text: "Ensure that the --peer-client-cert-auth argument is set to true (Automated)"
+        audit: "/bin/cat $etcdconf | /bin/grep enable-tls || true"
+        tests:
+          bin_op: or
+          test_items:
+            - flag: "--enable-tls"
+              compare:
+                op: eq
+                value: true
+            - flag: "--enable-tls"
+              set: false
+        remediation: |
+          MicroK8s used dqlite and tls peer communication uses is TLS if the --enable-tls is set in
+          /var/snap/microk8s/current/args/k8s-dqlite, set to true by default.
+        scored: true
+
+      - id: 2.6
+        text: "Ensure that the --peer-auto-tls argument is not set to true (Automated)"
+        audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep"
+        tests:
+          bin_op: or
+          test_items:
+            - flag: "--peer-auto-tls"
+              env: "ETCD_PEER_AUTO_TLS"
+              set: false
+            - flag: "--peer-auto-tls"
+              env: "ETCD_PEER_AUTO_TLS"
+              compare:
+                op: eq
+                value: false
+        remediation: |
+          Not applicable. MicroK8s used dqlite and tls peer communication uses the certificates
+          created upon the snap creation.
+        scored: false
+
+      - id: 2.7
+        text: "Ensure that a unique Certificate Authority is used for etcd (Manual)"
+        audit: "/bin/ps -ef | /bin/grep $etcdbin | /bin/grep -v grep"
+        tests:
+          test_items:
+            - flag: "--trusted-ca-file"
+              env: "ETCD_TRUSTED_CA_FILE"
+        remediation: |
+          Not applicable. MicroK8s used dqlite and tls peer communication uses the certificates
+          created upon the snap creation.
+        scored: false