├── LICENSE ├── README.md ├── chapter-02 ├── 01-audit-log-all-requests.yaml └── 02-log-pod-changes.yaml ├── chapter-03 └── 01-Dockerfile ├── chapter-04 ├── 01-psp.yaml ├── 02-psp-auth-users.yaml ├── 03-pod-security-context.yaml ├── 04-app-armor.txt ├── 04-selinux-profile.yaml ├── 05-somax.yaml └── 06-psp-unsafe.yaml ├── chapter-05 ├── 01-service-definition.yaml └── 02-deployment.yaml ├── chapter-07 ├── 01-egress-policy.yaml ├── 02-database-example.yaml ├── 03-default-deny.yaml ├── 04-ingress-egress-default-deny.yaml └── 05-allow-dns-access.yaml ├── chapter-08 └── 01-intern.yaml └── chapter-11 ├── 01-threat-feed.yaml └── 02-block-threats.yaml /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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level: Metadata 5 | -------------------------------------------------------------------------------- /chapter-02/02-log-pod-changes.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: audit.k8s.io/v1 # This is required. 2 | kind: Policy 3 | omitStages: 4 | - "RequestReceived" 5 | rules: 6 | - level: RequestResponse 7 | resources: 8 | - group: "" 9 | resources: ["pods"] 10 | - level: Metadata 11 | resources: 12 | - group: "" # core API group 13 | resources: ["secrets", "configmaps"] 14 | -------------------------------------------------------------------------------- /chapter-03/01-Dockerfile: -------------------------------------------------------------------------------- 1 | # use alpine 3 as base image 2 | FROM alpine:3 as builder 3 | # upgrade all alpine packages 4 | RUN apk update && apk upgrade 5 | # add your script into container fs 6 | ADD your_init_script.sh your_init_script.sh 7 | RUN chmod u+x your_init_script.sh 8 | 9 | # stage 2 10 | FROM scratch 11 | 12 | # shell 13 | COPY --from=builder /bin/sh /bin/sh 14 | 15 | # dependent linux shared libraries 16 | COPY --from=builder /lib/ld-musl-x86_64.so.1 /lib/ld-musl-x86_64.so.1 17 | 18 | ENV PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 19 | 20 | ENTRYPOINT ["./your_init_script.sh"] 21 | -------------------------------------------------------------------------------- /chapter-04/01-psp.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: policy/v1beta1 2 | kind: PodSecurityPolicy 3 | metadata: 4 | name: restricted 5 | annotations: 6 | seccomp.security.alpha.kubernetes.io/allowedProfileNames: + 7 | 'docker/default,runtime/default' 8 | apparmor.security.beta.kubernetes.io/allowedProfileNames: 'runtime/default' 9 | seccomp.security.alpha.kubernetes.io/defaultProfileName: 'runtime/default' 10 | apparmor.security.beta.kubernetes.io/defaultProfileName: 'runtime/default' 11 | spec: 12 | privileged: false 13 | # Required to prevent escalations to root. 14 | allowPrivilegeEscalation: false 15 | # This is redundant with non-root + disallow privilege escalation, 16 | # # but we can provide it for defense in depth. 17 | requiredDropCapabilities: 18 | - ALL 19 | # Allow core volume types. 20 | volumes: 21 | - 'configMap' 22 | - 'emptyDir' 23 | - 'projected' 24 | - 'secret' 25 | - 'downwardAPI' 26 | # Assume that persistentVolumes set up by the cluster admin are safe to use. 27 | - 'persistentVolumeClaim' 28 | hostNetwork: false 29 | hostIPC: false 30 | hostPID: false 31 | runAsUser: 32 | # Require the container to run without root privileges. 33 | rule: 'MustRunAsNonRoot' 34 | seLinux: 35 | # This policy assumes the nodes are using AppArmor rather than SELinux. 36 | rule: 'RunAsAny' 37 | supplementalGroups: 38 | rule: 'MustRunAs' 39 | ranges: 40 | # Forbid adding the root group. 41 | - min: 1 42 | max: 65535 43 | fsGroup: 44 | rule: 'MustRunAs' 45 | ranges: 46 | # Forbid adding the root group. 47 | - min: 1 48 | max: 65535 49 | readOnlyRootFilesystem: false 50 | -------------------------------------------------------------------------------- /chapter-04/02-psp-auth-users.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: rbac.authorization.k8s.io/v1 2 | kind: ClusterRole Policy 3 | metadata: 4 | name: psp-restricted 5 | rules: 6 | - apiGroups: 7 | - policy 8 | resourceNames: 9 | - restricted 10 | resources: 11 | - podsecuritypolicies 12 | verbs: 13 | - use 14 | --- 15 | apiVersion: rbac.authorization.k8s.io/v1 16 | kind: ClusterRoleBinding 17 | metadata: 18 | name: psp-restricted-binding 19 | roleRef: 20 | apiGroup: rbac.authorization.k8s.io 21 | kind: ClusterRole 22 | name: psp-restricted 23 | subjects: 24 | - apiGroup: rbac.authoriation.k8s.io 25 | name: system:authenticated 26 | kind: Group 27 | -------------------------------------------------------------------------------- /chapter-04/03-pod-security-context.yaml: -------------------------------------------------------------------------------- 1 | kind: Pod 2 | apiVersion: v1 3 | metadata: 4 | name: attacker-privileged-test 5 | namespace: default 6 | labels: 7 | app: normal-app 8 | spec: 9 | containers: 10 | - name: attacker-container 11 | image: alpine:latest 12 | args: ["sleep", "10000"] 13 | securityContext: 14 | runAsUser: 0 15 | capabilities: 16 | drop: 17 | - all 18 | add: 19 | - SYS_CHROOT 20 | - NET_BIND_SERVICE - SETGID 21 | - SETUID 22 | -------------------------------------------------------------------------------- /chapter-04/04-app-armor.txt: -------------------------------------------------------------------------------- 1 | #include 2 | /{usr/,}bin/ping flags=(complain) { 3 | #include 4 | #include 5 | #include 6 | 7 | capability net_raw, 8 | capability setuid, 9 | network inet raw, 10 | 11 | /bin/ping mixr, 12 | /etc/modules.conf r, 13 | 14 | # Site-specific additions and overrides. See local/README for details. 15 | #include 16 | } 17 | -------------------------------------------------------------------------------- /chapter-04/04-selinux-profile.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | metadata: 3 | name: pod-se-linux-label 4 | namespace: default 5 | labels: 6 | app: normal-app 7 | spec: 8 | containers: 9 | - name: app-container 10 | image: alpine:latest 11 | args: ["sleep", "10000"] 12 | securityContext: 13 | seLinuxOptions: 14 | level: "s0:c123,c456" 15 | volumes: 16 | - name: rootfs 17 | hostPath: 18 | path: / 19 | -------------------------------------------------------------------------------- /chapter-04/05-somax.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: Pod 3 | metadata: 4 | name: sysctl-example 5 | spec: 6 | securityContext: 7 | sysctls: 8 | - name: net.core.somaxconn 9 | value: "1024" 10 | -------------------------------------------------------------------------------- /chapter-04/06-psp-unsafe.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: policy/v1beta1 2 | kind: PodSecurityPolicy 3 | metadata: 4 | name: sysctl-psp 5 | spec: 6 | allowedUnsafeSysctls: 7 | - kernel.msg* 8 | -------------------------------------------------------------------------------- /chapter-05/01-service-definition.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: Service 3 | metadata: 4 | name: my-service 5 | spec: 6 | selector: 7 | app: MyApp 8 | ports: 9 | - protocol: TCP 10 | port: 80 11 | targetPort: 9376 12 | -------------------------------------------------------------------------------- /chapter-05/02-deployment.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: apps/v1 2 | kind: Deployment 3 | metadata: 4 | name: nginx-deployment 5 | labels: 6 | app: nginx 7 | spec: 8 | replicas: 3 9 | selector: 10 | matchLabels: 11 | app: nginx 12 | template: 13 | metadata: 14 | labels: 15 | app: nginx 16 | spec: 17 | containers: 18 | - name: nginx 19 | image: nginx:1.14.2 20 | ports: 21 | - containerPort: 80 22 | -------------------------------------------------------------------------------- /chapter-07/01-egress-policy.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: projectcalico.org/v3 2 | kind: NetworkPolicy 3 | metadata: 4 | name: back-end-policy 5 | namespace: production 6 | spec: 7 | selector: app == 'back-end' 8 | ingress: 9 | - action: Allow 10 | protocol: TCP 11 | source: 12 | selector: app == 'front-end' 13 | destination: 14 | ports: 15 | - 80 16 | egress: 17 | - action: Allow 18 | protocol: TCP 19 | destination: 20 | selector: app == 'database' 21 | ports: 22 | - 80 23 | -------------------------------------------------------------------------------- /chapter-07/02-database-example.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: projectcalico.org/v3 2 | kind: NetworkPolicy 3 | metadata: 4 | name: back-end-policy 5 | namespace: production 6 | spec: 7 | selector: app == 'back-end' 8 | ingress: 9 | - action: Allow 10 | protocol: TCP 11 | source: 12 | selector: app == 'front-end' 13 | destination: 14 | ports: 15 | - 80 16 | egress: 17 | - action: Allow 18 | protocol: TCP 19 | destination: 20 | selector: app == 'database' 21 | ports: 22 | - 80 23 | -------------------------------------------------------------------------------- /chapter-07/03-default-deny.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: networking.k8s.io/v1 2 | kind: NetworkPolicy 3 | metadata: 4 | name: default-deny 5 | Namespace: my-namespace 6 | spec: 7 | podSelector: {} 8 | policyTypes: 9 | - Ingress 10 | - Egress 11 | -------------------------------------------------------------------------------- /chapter-07/04-ingress-egress-default-deny.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: projectcalico.org/v3 2 | kind: GlobalNetworkPolicy 3 | metadata: 4 | name: default-deny 5 | spec: 6 | selector: all() 7 | types: 8 | - Ingress 9 | - Egress 10 | -------------------------------------------------------------------------------- /chapter-07/05-allow-dns-access.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: projectcalico.org/v3 2 | kind: GlobalNetworkPolicy 3 | metadata: 4 | name: default-app-policy 5 | spec: 6 | namespaceSelector: has(projectcalico.org/name) && + 7 | projectcalico.org/name not in + 8 | {"kube-system", "calico-system"} 9 | types: 10 | - Ingress 11 | - Egress 12 | egress: 13 | - action: Allow 14 | protocol: UDP 15 | destination: 16 | selector: k8s-app == "kube-dns" 17 | ports: 18 | - 53 19 | -------------------------------------------------------------------------------- /chapter-08/01-intern.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: projectcalico.org/v3 2 | kind: NetworkPolicy 3 | metadata: 4 | name: restrict-intern-access 5 | namespace: prod-engineering 6 | spec: 7 | serviceAccountSelector: 'role == "intern"' 8 | ingress: 9 | - action: Allow 10 | source: 11 | serviceAccounts: 12 | selector: 'role == "intern"' 13 | egress: 14 | - action: Allow 15 | destination: 16 | serviceAccounts: 17 | selector: 'role == "intern"' 18 | -------------------------------------------------------------------------------- /chapter-11/01-threat-feed.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: projectcalico.org/v3 2 | kind: GlobalThreatFeed 3 | metadata: 4 | name: sample-global-threat-feed 5 | spec: 6 | content: IPSet 7 | pull: 8 | http: 9 | url: https://an.example.threat.feed/blacklist 10 | globalNetworkSet: 11 | labels: 12 | security-action: block 13 | -------------------------------------------------------------------------------- /chapter-11/02-block-threats.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: projectcalico.org/v3 2 | kind: GlobalNetworkPolicy 3 | metadata: 4 | name: default.blockthreats 5 | spec: 6 | tier: default 7 | selector: all() 8 | types: 9 | - Ingress 10 | ingress: 11 | - action: Deny 12 | source: 13 | selector: security-action == 'block 14 | --------------------------------------------------------------------------------