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policy-gatekeeper-container-image-latest.yaml
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policy-gatekeeper-container-image-latest.yaml
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apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
name: policy-gatekeeper-containerimagelatest
annotations:
policy.open-cluster-management.io/standards: NIST SP 800-53
policy.open-cluster-management.io/categories: CM Configuration Management
policy.open-cluster-management.io/controls: CM-2 Baseline Configuration
spec:
remediationAction: enforce
disabled: false
policy-templates:
- objectDefinition:
apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
name: policy-gatekeeper-containerimagelatest
spec:
remediationAction: enforce
severity: low
object-templates:
- complianceType: musthave
objectDefinition:
apiVersion: templates.gatekeeper.sh/v1beta1
kind: ConstraintTemplate
metadata:
creationTimestamp: null
name: containerimagelatest
spec:
crd:
spec:
names:
kind: ContainerImageLatest
targets:
- libs:
- |
package lib.konstraint
default is_gatekeeper = false
is_gatekeeper {
has_field(input, "review")
has_field(input.review, "object")
}
object = input {
not is_gatekeeper
}
object = input.review.object {
is_gatekeeper
}
format(msg) = gatekeeper_format {
is_gatekeeper
gatekeeper_format = {"msg": msg}
}
format(msg) = msg {
not is_gatekeeper
}
name = object.metadata.name
kind = object.kind
has_field(obj, field) {
obj[field]
}
missing_field(obj, field) = true {
obj[field] == ""
}
missing_field(obj, field) = true {
not has_field(obj, field)
}
is_service {
lower(kind) == "service"
}
is_statefulset {
lower(kind) == "statefulset"
}
is_daemonset {
lower(kind) == "daemonset"
}
is_deployment {
lower(kind) == "deployment"
}
is_pod {
lower(kind) == "pod"
}
is_namespace {
lower(kind) == "namespace"
}
is_workload {
containers[_]
}
pod_containers(pod) = all_containers {
keys = {"containers", "initContainers"}
all_containers = [c | keys[k]; c = pod.spec[k][_]]
}
containers[container] {
pods[pod]
all_containers = pod_containers(pod)
container = all_containers[_]
}
containers[container] {
all_containers = pod_containers(object)
container = all_containers[_]
}
container_images[image] {
containers[container]
image = container.image
}
container_images[image] {
image = object.spec.image
}
split_image(image) = [image, "latest"] {
not contains(image, ":")
}
split_image(image) = [image_name, tag] {
[image_name, tag] = split(image, ":")
}
pods[pod] {
is_statefulset
pod = object.spec.template
}
pods[pod] {
is_daemonset
pod = object.spec.template
}
pods[pod] {
is_deployment
pod = object.spec.template
}
pods[pod] {
is_pod
pod = object
}
volumes[volume] {
pods[pod]
volume = pod.spec.volumes[_]
}
mem_multiple("E") = 1000000000000000000000 { true }
mem_multiple("P") = 1000000000000000000 { true }
mem_multiple("T") = 1000000000000000 { true }
mem_multiple("G") = 1000000000000 { true }
mem_multiple("M") = 1000000000 { true }
mem_multiple("k") = 1000000 { true }
mem_multiple("") = 1000 { true }
mem_multiple("m") = 1 { true }
mem_multiple("Ki") = 1024000 { true }
mem_multiple("Mi") = 1048576000 { true }
mem_multiple("Gi") = 1073741824000 { true }
mem_multiple("Ti") = 1099511627776000 { true }
mem_multiple("Pi") = 1125899906842624000 { true }
mem_multiple("Ei") = 1152921504606846976000 { true }
get_suffix(mem) = suffix {
not is_string(mem)
suffix := ""
}
get_suffix(mem) = suffix {
is_string(mem)
count(mem) > 0
suffix := substring(mem, count(mem) - 1, -1)
mem_multiple(suffix)
}
get_suffix(mem) = suffix {
is_string(mem)
count(mem) > 1
suffix := substring(mem, count(mem) - 2, -1)
mem_multiple(suffix)
}
get_suffix(mem) = suffix {
is_string(mem)
count(mem) > 1
not mem_multiple(substring(mem, count(mem) - 1, -1))
not mem_multiple(substring(mem, count(mem) - 2, -1))
suffix := ""
}
get_suffix(mem) = suffix {
is_string(mem)
count(mem) == 1
not mem_multiple(substring(mem, count(mem) - 1, -1))
suffix := ""
}
get_suffix(mem) = suffix {
is_string(mem)
count(mem) == 0
suffix := ""
}
canonify_mem(orig) = new {
is_number(orig)
new := orig * 1000
}
canonify_mem(orig) = new {
not is_number(orig)
suffix := get_suffix(orig)
raw := replace(orig, suffix, "")
re_match("^[0-9]+$", raw)
new := to_number(raw) * mem_multiple(suffix)
}
canonify_storage(orig) = new {
is_number(orig)
new := orig
}
canonify_storage(orig) = new {
not is_number(orig)
suffix := get_suffix(orig)
raw := replace(orig, suffix, "")
re_match("^[0-9]+$", raw)
new := to_number(raw) * mem_multiple(suffix)
}
canonify_cpu(orig) = new {
is_number(orig)
new := orig * 1000
}
canonify_cpu(orig) = new {
not is_number(orig)
endswith(orig, "m")
new := to_number(replace(orig, "m", ""))
}
canonify_cpu(orig) = new {
not is_number(orig)
not endswith(orig, "m")
re_match("^[0-9]+$", orig)
new := to_number(orig) * 1000
}
dropped_capability(container, cap) {
container.securityContext.capabilities.drop[_] == cap
}
added_capability(container, cap) {
container.securityContext.capabilities.add[_] == cap
}
no_read_only_filesystem(c) {
not has_field(c, "securityContext")
}
no_read_only_filesystem(c) {
has_field(c, "securityContext")
not has_field(c.securityContext, "readOnlyRootFilesystem")
}
priviledge_escalation_allowed(c) {
not has_field(c, "securityContext")
}
priviledge_escalation_allowed(c) {
has_field(c, "securityContext")
has_field(c.securityContext, "allowPrivilegeEscalation")
}
- |-
package lib.openshift
import data.lib.konstraint
is_deploymentconfig {
lower(konstraint.object.apiVersion) == "apps.openshift.io/v1"
lower(konstraint.object.kind) == "deploymentconfig"
}
is_route {
lower(konstraint.object.apiVersion) == "route.openshift.io/v1"
lower(konstraint.object.kind) == "route"
}
is_workload_kind {
is_deploymentconfig
}
is_workload_kind {
konstraint.is_statefulset
}
is_workload_kind {
konstraint.is_daemonset
}
is_workload_kind {
konstraint.is_deployment
}
is_all_kind {
is_workload_kind
}
is_all_kind {
konstraint.is_service
}
is_all_kind {
is_route
}
pods[pod] {
is_deploymentconfig
pod = konstraint.object.spec.template
}
pods[pod] {
pod = konstraint.pods[_]
}
containers[container] {
pods[pod]
all_containers = konstraint.pod_containers(pod)
container = all_containers[_]
}
containers[container] {
container = konstraint.containers[_]
}
rego: |-
package ocp.bestpractices.container_image_latest
import data.lib.konstraint
import data.lib.openshift
violation[msg] {
openshift.is_workload_kind
container := openshift.containers[_]
endswith(container.image, ":latest")
obj := konstraint.object
msg := konstraint.format(sprintf("%s/%s: container '%s' is using the latest tag for its image (%s), which is an anti-pattern.", [obj.kind, obj.metadata.name, container.name, container.image]))
}
target: admission.k8s.gatekeeper.sh
- complianceType: musthave
objectDefinition:
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: ContainerImageLatest
metadata:
name: containerimagelatest
spec:
enforcementAction: dryrun
match:
kinds:
- apiGroups:
- apps.openshift.io
- apps
kinds:
- DeploymentConfig
- DaemonSet
- Deployment
- StatefulSet
- objectDefinition:
apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
name: policy-gatekeeper-audit-latest
spec:
remediationAction: inform # will be overridden by remediationAction in parent policy
severity: low
object-templates:
- complianceType: musthave
objectDefinition:
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: ContainerImageLatest
metadata:
name: containerimagelatest
status:
totalViolations: 0
- objectDefinition:
apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
name: policy-gatekeeper-admission-latest
spec:
remediationAction: inform # will be overridden by remediationAction in parent policy
severity: low
object-templates:
- complianceType: mustnothave
objectDefinition:
apiVersion: v1
kind: Event
metadata:
namespace: openshift-gatekeeper-system # set it to the actual namespace where gatekeeper is running if different
annotations:
constraint_action: deny
constraint_kind: ContainerImageLatest
constraint_name: containerimagelatest
event_type: violation