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kubernetes/test/cmd/debug.sh

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#!/usr/bin/env bash
# Copyright 2020 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -o errexit
set -o nounset
set -o pipefail
run_kubectl_debug_pod_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug (pod tests)"
### Pod Troubleshooting by ephemeral containers
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container
kubectl debug target -it --image=busybox --attach=false -c debug-container "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod/target '{{range.spec.ephemeralContainers}}{{.name}}:{{end}}' 'debug-container:'
# Clean up
kubectl delete pod target "${kube_flags[@]:?}"
### Pod Troubleshooting by Copy
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container
kubectl debug target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.image}}:{{end}}' "${IMAGE_NGINX:?}:busybox:"
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
# Pre-Condition: Pod "nginx" with labels, annotations, probes and initContainers is created
kubectl create -f hack/testdata/pod-with-metadata-and-probes.yaml
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container with --keep-* flags
# --keep-* flags intentionally don't work with legacyProfile(Only labels are removed)
kubectl debug target -it --copy-to=target-copy --image=busybox --container=debug-container --keep-labels=true --keep-annotations=true --keep-liveness=true --keep-readiness=true --keep-startup=true --keep-init-containers=false --attach=false "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy '{{.metadata.labels}}' '<no value>'
kube::test::get_object_assert pod/target-copy '{{.metadata.annotations}}' 'map\[test:test\]'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.image}}:{{end}}' "${IMAGE_NGINX:?}:busybox:"
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "livenessProbe")}}:{{end}}{{end}}' ':'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "readinessProbe")}}:{{end}}{{end}}' ':'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "startupProbe")}}:{{end}}{{end}}' ':'
kube::test::get_object_assert pod/target-copy '{{range.spec.initContainers}}{{.name}}:{{end}}' 'init:'
kube::test::get_object_assert pod/target-copy '{{range.spec.initContainers}}{{.image}}:{{end}}' "busybox:"
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container replacing the previous pod
kubectl debug target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false --replace "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target-copy:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.image}}:{{end}}' "${IMAGE_NGINX:?}:busybox:"
# Clean up
kubectl delete pod target-copy "${kube_flags[@]:?}"
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
kube::test::get_object_assert pod/target '{{(index .spec.containers 0).name}}' 'target'
# Command: copy the pod and replace the image of an existing container
kubectl debug target --image=busybox --container=target --copy-to=target-copy "${kube_flags[@]:?}" -- sleep 1m
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy "{{(len .spec.containers)}}:{{${image_field:?}}}" '1:busybox'
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
kube::test::get_object_assert pod/target '{{(index .spec.containers 0).name}}' 'target'
# Command: copy the pod and replace the image of an existing container
kubectl get pod/target -o yaml > "${KUBE_TEMP}"/test-pod-debug.yaml
kubectl debug -f "${KUBE_TEMP}"/test-pod-debug.yaml --image=busybox --container=target --copy-to=target-copy "${kube_flags[@]:?}" -- sleep 1m
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy "{{(len .spec.containers)}}:{{${image_field:?}}}" '1:busybox'
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_node_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug (pod tests)"
### Node Troubleshooting by Privileged Container
# Pre-Condition: Pod "nginx" is created
kube::test::get_object_assert nodes "{{range.items}}{{${id_field:?}}}:{{end}}" '127.0.0.1:'
# Command: create a new node debugger pod
output_message=$(kubectl debug node/127.0.0.1 --image=busybox --attach=false "${kube_flags[@]:?}" -- true)
# Post-Conditions
kube::test::get_object_assert pod "{{(len .items)}}" '1'
debugger=$(kubectl get pod -o go-template="{{(index .items 0)${id_field:?}}}")
kube::test::if_has_string "${output_message:?}" "${debugger:?}"
kube::test::get_object_assert "pod/${debugger:?}" "{{${image_field:?}}}" 'busybox'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.nodeName}}' '127.0.0.1'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostIPC}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostNetwork}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostPID}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{(index (index .spec.containers 0).volumeMounts 0).mountPath}}' '/host'
kube::test::get_object_assert "pod/${debugger:?}" '{{(index .spec.volumes 0).hostPath.path}}' '/'
# Clean up
# pod.spec.nodeName is set by kubectl debug node which causes the delete to hang,
# presumably waiting for a kubelet that's not present. Force the delete.
kubectl delete --force pod "${debugger:?}" "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_general_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug profile general"
### Debug by pod copy
# Pre-Condition: Pod "nginx" with labels, annotations, probes and initContainers is created
kubectl create -f hack/testdata/pod-with-metadata-and-probes.yaml
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container
# labels, annotations, probes are removed and initContainers are kept, sets SYS_PTRACE in debugging container, sets shareProcessNamespace
kubectl debug --profile general target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy '{{.metadata.labels}}' '<no value>'
kube::test::get_object_assert pod/target-copy '{{.metadata.annotations}}' '<no value>'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.image}}:{{end}}' "${IMAGE_NGINX:?}:busybox:"
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "livenessProbe")}}:{{end}}{{end}}' ''
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "readinessProbe")}}:{{end}}{{end}}' ''
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "startupProbe")}}:{{end}}{{end}}' ''
kube::test::get_object_assert pod/target-copy '{{range.spec.initContainers}}{{.name}}:{{end}}' 'init:'
kube::test::get_object_assert pod/target-copy '{{range.spec.initContainers}}{{.image}}:{{end}}' "busybox:"
kube::test::get_object_assert pod/target-copy '{{(index (index .spec.containers 1).securityContext.capabilities.add 0)}}' 'SYS_PTRACE'
kube::test::get_object_assert pod/target-copy '{{.spec.shareProcessNamespace}}' 'true'
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
# Pre-Condition: Pod "nginx" with labels, annotations, probes and initContainers is created
kubectl create -f hack/testdata/pod-with-metadata-and-probes.yaml
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container with --keep-* flags
# labels, annotations, probes are kept and initContainers are removed, sets SYS_PTRACE in debugging container, sets shareProcessNamespace
kubectl debug --profile general target -it --copy-to=target-copy --image=busybox --container=debug-container --keep-labels=true --keep-annotations=true --keep-liveness=true --keep-readiness=true --keep-startup=true --keep-init-containers=false --attach=false "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy '{{.metadata.labels}}' 'map\[run:target\]'
kube::test::get_object_assert pod/target-copy '{{.metadata.annotations}}' 'map\[test:test\]'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.image}}:{{end}}' "${IMAGE_NGINX:?}:busybox:"
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "livenessProbe")}}:{{end}}{{end}}' ':'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "readinessProbe")}}:{{end}}{{end}}' ':'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "startupProbe")}}:{{end}}{{end}}' ':'
kube::test::get_object_assert pod/target-copy '{{.spec.initContainers}}' '<no value>'
kube::test::get_object_assert pod/target-copy '{{(index (index .spec.containers 1).securityContext.capabilities.add 0)}}' 'SYS_PTRACE'
kube::test::get_object_assert pod/target-copy '{{.spec.shareProcessNamespace}}' 'true'
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
### Debug by EC
### sets SYS_PTRACE in ephemeral container
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container
kubectl debug --profile general target -it --image=busybox --container=debug-container --attach=false "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod/target '{{range.spec.ephemeralContainers}}{{.name}}:{{.image}}{{end}}' 'debug-container:busybox'
kube::test::get_object_assert pod/target '{{(index (index .spec.ephemeralContainers 0).securityContext.capabilities.add 0)}}' 'SYS_PTRACE'
# Clean up
kubectl delete pod target "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_general_node_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug profile general (node)"
### Debug node
### empty securityContext, uses host namespaces, mounts root partition
# Pre-Condition: node exists
kube::test::get_object_assert nodes "{{range.items}}{{${id_field:?}}}:{{end}}" '127.0.0.1:'
# Command: create a new node debugger pod
output_message=$(kubectl debug --profile general node/127.0.0.1 --image=busybox --attach=false "${kube_flags[@]:?}" -- true)
# Post-Conditions
kube::test::get_object_assert pod "{{(len .items)}}" '1'
debugger=$(kubectl get pod -o go-template="{{(index .items 0)${id_field:?}}}")
kube::test::if_has_string "${output_message:?}" "${debugger:?}"
kube::test::get_object_assert "pod/${debugger:?}" "{{${image_field:?}}}" 'busybox'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.nodeName}}' '127.0.0.1'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostIPC}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostNetwork}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostPID}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{(index (index .spec.containers 0).volumeMounts 0).mountPath}}' '/host'
kube::test::get_object_assert "pod/${debugger:?}" '{{(index .spec.volumes 0).hostPath.path}}' '/'
kube::test::get_object_assert "pod/${debugger:?}" '{{if (index (index .spec.containers 0) "securityContext")}}:{{end}}' ''
# Clean up
# pod.spec.nodeName is set by kubectl debug node which causes the delete to hang,
# presumably waiting for a kubelet that's not present. Force the delete.
kubectl delete --force pod "${debugger:?}" "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_baseline_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug profile baseline"
### Debug by pod copy
### probes are removed, empty securityContext, sets shareProcessNamespace
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container
kubectl debug --profile baseline target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.image}}:{{end}}' "${IMAGE_NGINX:?}:busybox:"
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "livenessProbe")}}:{{end}}{{end}}' ''
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "readinessProbe")}}:{{end}}{{end}}' ''
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{if (index . "startupProbe")}}:{{end}}{{end}}' ''
kube::test::get_object_assert pod/target-copy '{{if (index (index .spec.containers 0) "securityContext")}}:{{end}}' ''
kube::test::get_object_assert pod/target-copy '{{.spec.shareProcessNamespace}}' 'true'
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
### Debug by EC
### empty securityContext
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container
kubectl debug --profile baseline target -it --image=busybox --container=debug-container --attach=false "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod/target '{{range.spec.ephemeralContainers}}{{.name}}:{{.image}}{{end}}' 'debug-container:busybox'
kube::test::get_object_assert pod/target '{{if (index (index .spec.ephemeralContainers 0) "securityContext")}}:{{end}}' ''
# Clean up
kubectl delete pod target "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_baseline_node_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug profile baseline (node)"
### Debug node
### empty securityContext, uses isolated namespaces
# Pre-Condition: node exists
kube::test::get_object_assert nodes "{{range.items}}{{${id_field:?}}}:{{end}}" '127.0.0.1:'
# Command: create a new node debugger pod
output_message=$(kubectl debug --profile baseline node/127.0.0.1 --image=busybox --attach=false "${kube_flags[@]:?}" -- true)
# Post-Conditions
kube::test::get_object_assert pod "{{(len .items)}}" '1'
debugger=$(kubectl get pod -o go-template="{{(index .items 0)${id_field:?}}}")
kube::test::if_has_string "${output_message:?}" "${debugger:?}"
kube::test::get_object_assert "pod/${debugger:?}" "{{${image_field:?}}}" 'busybox'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.nodeName}}' '127.0.0.1'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostIPC}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostNetwork}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostPID}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?}" '{{if (index (index .spec.containers 0) "securityContext")}}:{{end}}' ''
# Clean up
# pod.spec.nodeName is set by kubectl debug node which causes the delete to hang,
# presumably waiting for a kubelet that's not present. Force the delete.
kubectl delete --force pod "${debugger:?}" "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_restricted_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug profile restricted"
### Pod Troubleshooting by ephemeral containers with restricted profile
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Restricted profile just works in not restricted namespace
# Command: add a new debug container with restricted profile
output_message=$(kubectl debug target -it --image=busybox --attach=false -c debug-container --profile=restricted "${kube_flags[@]:?}")
kube::test::if_has_not_string "${output_message}" 'forbidden: violates PodSecurity'
# Post-Conditions
kube::test::get_object_assert pod/target '{{range.spec.ephemeralContainers}}{{.name}}:{{end}}' 'debug-container:'
# Clean up
kubectl delete pod target "${kube_flags[@]:?}"
### Pod Troubleshooting by pod copy with restricted profile
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Restricted profile just works in not restricted namespace
# Command: create a copy of target with a new debug container
kubectl debug target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false --profile=restricted "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.image}}:{{end}}' "${IMAGE_NGINX:?}:busybox:"
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
ns_name="namespace-restricted"
# Command: create namespace and add a label
kubectl create namespace "${ns_name}"
kubectl label namespace "${ns_name}" pod-security.kubernetes.io/enforce=restricted
output_message=$(kubectl get namespaces "${ns_name}" --show-labels)
kube::test::if_has_string "${output_message}" 'pod-security.kubernetes.io/enforce=restricted'
### Pod Troubleshooting by ephemeral containers with restricted profile (restricted namespace)
# Pre-Condition: Pod "busybox" is created that complies with the restricted policy
kubectl create -f hack/testdata/pod-restricted-runtime-default.yaml -n "${ns_name}"
kube::test::get_object_assert "pod -n ${ns_name}" "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Restricted profile works when pod's seccompProfile is RuntimeDefault
# Command: add a new debug container with restricted profile
output_message=$(kubectl debug target -it --image=busybox --attach=false -c debug-container --profile=restricted -n "${ns_name}" "${kube_flags[@]:?}")
kube::test::if_has_not_string "${output_message}" 'forbidden: violates PodSecurity'
# Post-Conditions
kube::test::get_object_assert "pod/target -n ${ns_name}" '{{range.spec.ephemeralContainers}}{{.name}}:{{end}}' 'debug-container:'
# Clean up
kubectl delete pod target -n "${ns_name}" "${kube_flags[@]:?}"
### Pod Troubleshooting by pod copy with restricted profile (restricted namespace)
# Pre-Condition: Pod "nginx" is created
kubectl create -f hack/testdata/pod-restricted-runtime-default.yaml -n "${ns_name}"
kube::test::get_object_assert "pod -n ${ns_name}" "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Restricted profile works when pod's seccompProfile is RuntimeDefault
# Command: create a copy of target with a new debug container
kubectl debug target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false --profile=restricted -n ${ns_name} "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert "pod -n ${ns_name}" "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert "pod/target-copy -n ${ns_name}" '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert "pod/target-copy -n ${ns_name}" '{{range.spec.containers}}{{.image}}:{{end}}' "busybox:busybox:"
# Clean up
kubectl delete pod target target-copy -n "${ns_name}" "${kube_flags[@]:?}"
### Pod Troubleshooting by ephemeral containers with restricted profile (restricted namespace)
# Pre-Condition: Pod "busybox" is created that complies with the restricted policy
kubectl create -f hack/testdata/pod-restricted-localhost.yaml -n "${ns_name}"
kube::test::get_object_assert "pod -n ${ns_name}" "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Restricted profile works when pod's seccompProfile is Localhost
# Command: add a new debug container with restricted profile
output_message=$(kubectl debug target -it --image=busybox --attach=false -c debug-container --profile=restricted -n ${ns_name} "${kube_flags[@]:?}")
kube::test::if_has_not_string "${output_message}" 'forbidden: violates PodSecurity'
# Post-Conditions
kube::test::get_object_assert "pod/target -n ${ns_name}" '{{range.spec.ephemeralContainers}}{{.name}}:{{end}}' 'debug-container:'
# Clean up
kubectl delete pod target -n ${ns_name} "${kube_flags[@]:?}"
### Pod Troubleshooting by pod copy with restricted profile (restricted namespace)
# Pre-Condition: Pod "nginx" is created
kubectl create -f hack/testdata/pod-restricted-localhost.yaml -n "${ns_name}"
kube::test::get_object_assert "pod -n ${ns_name}" "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Restricted profile works when pod's seccompProfile is Localhost
# Command: create a copy of target with a new debug container
kubectl debug target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false --profile=restricted -n ${ns_name} "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert "pod -n ${ns_name}" "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert "pod/target-copy -n ${ns_name}" '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert "pod/target-copy -n ${ns_name}" '{{range.spec.containers}}{{.image}}:{{end}}' "busybox:busybox:"
# Clean up
kubectl delete pod target target-copy -n "${ns_name}" "${kube_flags[@]:?}"
# Clean up restricted namespace
kubectl delete namespace "${ns_name}"
set +o nounset
set +o errexit
}
run_kubectl_debug_restricted_node_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug profile restricted (node)"
### Debug node with restricted profile
# Pre-Condition: node exists
kube::test::get_object_assert nodes "{{range.items}}{{${id_field:?}}}:{{end}}" '127.0.0.1:'
# Restricted profile just works in not restricted namespace
# Command: create a new node debugger pod
output_message=$(kubectl debug --profile restricted node/127.0.0.1 --image=busybox --attach=false "${kube_flags[@]:?}" -- true)
kube::test::if_has_not_string "${output_message}" 'forbidden: violates PodSecurity'
# Post-Conditions
kube::test::get_object_assert pod "{{(len .items)}}" '1'
debugger=$(kubectl get pod -o go-template="{{(index .items 0)${id_field:?}}}")
kube::test::if_has_string "${output_message:?}" "${debugger:?}"
kube::test::get_object_assert "pod/${debugger:?}" "{{${image_field:?}}}" 'busybox'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.nodeName}}' '127.0.0.1'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostIPC}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostNetwork}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostPID}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?}" '{{index .spec.containers 0 "securityContext" "allowPrivilegeEscalation"}}' 'false'
kube::test::get_object_assert "pod/${debugger:?}" '{{index .spec.containers 0 "securityContext" "capabilities" "drop"}}' '\[ALL\]'
kube::test::get_object_assert "pod/${debugger:?}" '{{if (index (index .spec.containers 0) "securityContext" "capabilities" "add") }}:{{end}}' ''
kube::test::get_object_assert "pod/${debugger:?}" '{{index .spec.containers 0 "securityContext" "runAsNonRoot"}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{index .spec.containers 0 "securityContext" "seccompProfile" "type"}}' 'RuntimeDefault'
# Clean up
# pod.spec.nodeName is set by kubectl debug node which causes the delete to hang,
# presumably waiting for a kubelet that's not present. Force the delete.
kubectl delete --force pod "${debugger:?}" "${kube_flags[@]:?}"
ns_name="namespace-restricted"
# Command: create namespace and add a label
kubectl create namespace "${ns_name}"
kubectl label namespace "${ns_name}" pod-security.kubernetes.io/enforce=restricted
output_message=$(kubectl get namespaces "${ns_name}" --show-labels)
kube::test::if_has_string "${output_message}" 'pod-security.kubernetes.io/enforce=restricted'
### Debug node with restricted profile (restricted namespace)
# Pre-Condition: node exists
kube::test::get_object_assert nodes "{{range.items}}{{${id_field:?}}}:{{end}}" '127.0.0.1:'
# Restricted profile works in restricted namespace
# Command: create a new node debugger pod
output_message=$(kubectl debug --profile restricted node/127.0.0.1 --image=busybox --attach=false -n ${ns_name} "${kube_flags[@]:?}" -- true)
kube::test::if_has_not_string "${output_message}" 'forbidden: violates PodSecurity'
# Post-Conditions
kube::test::get_object_assert "pod -n ${ns_name}" "{{(len .items)}}" '1'
debugger=$(kubectl get pod -n ${ns_name} -o go-template="{{(index .items 0)${id_field:?}}}")
kube::test::if_has_string "${output_message:?}" "${debugger:?}"
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" "{{${image_field:?}}}" 'busybox'
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{.spec.nodeName}}' '127.0.0.1'
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{.spec.hostIPC}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{.spec.hostNetwork}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{.spec.hostPID}}' '<no value>'
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{index .spec.containers 0 "securityContext" "allowPrivilegeEscalation"}}' 'false'
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{index .spec.containers 0 "securityContext" "capabilities" "drop"}}' '\[ALL\]'
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{if (index (index .spec.containers 0) "securityContext" "capabilities" "add") }}:{{end}}' ''
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{index .spec.containers 0 "securityContext" "runAsNonRoot"}}' 'true'
kube::test::get_object_assert "pod/${debugger:?} -n ${ns_name}" '{{index .spec.containers 0 "securityContext" "seccompProfile" "type"}}' 'RuntimeDefault'
# Clean up
# pod.spec.nodeName is set by kubectl debug node which causes the delete to hang,
# presumably waiting for a kubelet that's not present. Force the delete.
kubectl delete --force pod "${debugger:?}" -n ${ns_name} "${kube_flags[@]:?}"
# Clean up restricted namespace
kubectl delete namespace "${ns_name}"
set +o nounset
set +o errexit
}
run_kubectl_debug_netadmin_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug profile netadmin"
### Pod Troubleshooting by ephemeral containers with netadmin profile
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: add a new debug container with netadmin profile
output_message=$(kubectl debug target -it --image=busybox --attach=false -c debug-container --profile=netadmin "${kube_flags[@]:?}")
# Post-Conditions
kube::test::get_object_assert pod/target '{{range.spec.ephemeralContainers}}{{.name}}:{{end}}' 'debug-container:'
kube::test::get_object_assert pod/target '{{(index (index .spec.ephemeralContainers 0).securityContext.capabilities.add)}}' '\[NET_ADMIN NET_RAW\]'
# Clean up
kubectl delete pod target "${kube_flags[@]:?}"
### Pod Troubleshooting by pod copy with netadmin profile
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container
kubectl debug target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false --profile=netadmin "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:target-copy:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target:debug-container:'
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.image}}:{{end}}' "${IMAGE_NGINX:?}:busybox:"
kube::test::get_object_assert pod/target-copy '{{.spec.shareProcessNamespace}}' 'true'
kube::test::get_object_assert pod/target-copy '{{(index (index .spec.containers 1).securityContext.capabilities.add)}}' '\[NET_ADMIN NET_RAW\]'
# Clean up
kubectl delete pod target target-copy "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_netadmin_node_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug profile netadmin (node)"
### Debug node with netadmin profile
# Pre-Condition: node exists
kube::test::get_object_assert nodes "{{range.items}}{{${id_field:?}}}:{{end}}" '127.0.0.1:'
# Command: create a new node debugger pod
output_message=$(kubectl debug --profile netadmin node/127.0.0.1 --image=busybox --attach=false "${kube_flags[@]:?}" -- true)
# Post-Conditions
kube::test::get_object_assert pod "{{(len .items)}}" '1'
debugger=$(kubectl get pod -o go-template="{{(index .items 0)${id_field:?}}}")
kube::test::if_has_string "${output_message:?}" "${debugger:?}"
kube::test::get_object_assert "pod/${debugger:?}" "{{${image_field:?}}}" 'busybox'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.nodeName}}' '127.0.0.1'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostNetwork}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.hostPID}}' 'true'
kube::test::get_object_assert "pod/${debugger:?}" '{{index .spec.containers 0 "securityContext" "capabilities" "add"}}' '\[NET_ADMIN NET_RAW\]'
# Clean up
# pod.spec.nodeName is set by kubectl debug node which causes the delete to hang,
# presumably waiting for a kubelet that's not present. Force the delete.
kubectl delete --force pod "${debugger:?}" "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_custom_profile_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug custom profile"
### Pod Troubleshooting by ephemeral containers with netadmin profile
# Pre-Condition: Pod "nginx" is created
kubectl run target-debug "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target-debug:'
cat > "${TMPDIR:-/tmp}"/custom_profile.json << EOF
{
"env": [
{
"name": "ENV_VAR1",
"value": "value1"
},
{
"name": "ENV_VAR2",
"value": "value2"
}
]
}
EOF
cat > "${TMPDIR:-/tmp}"/custom_profile.yaml << EOF
env:
- name: ENV_VAR3
value: value3
- name: ENV_VAR4
value: value4
EOF
# Command: add a new debug container with general profile
output_message=$(kubectl debug target-debug -it --image=busybox --attach=false -c debug-container --profile=general --custom="${TMPDIR:-/tmp}"/custom_profile.json "${kube_flags[@]:?}")
# Post-Conditions
kube::test::get_object_assert pod/target-debug '{{range.spec.ephemeralContainers}}{{.name}}:{{end}}' 'debug-container:'
kube::test::get_object_assert pod/target-debug '{{((index (index .spec.ephemeralContainers 0).env 0)).name}}' 'ENV_VAR1'
kube::test::get_object_assert pod/target-debug '{{((index (index .spec.ephemeralContainers 0).env 0)).value}}' 'value1'
kube::test::get_object_assert pod/target-debug '{{((index (index .spec.ephemeralContainers 0).env 1)).name}}' 'ENV_VAR2'
kube::test::get_object_assert pod/target-debug '{{((index (index .spec.ephemeralContainers 0).env 1)).value}}' 'value2'
# Command: add a new debug container with general profile
kubectl debug target-debug -it --image=busybox --attach=false -c debug-container-2 --profile=general --custom="${TMPDIR:-/tmp}"/custom_profile.yaml "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod/target-debug '{{range.spec.ephemeralContainers}}{{.name}}:{{end}}' 'debug-container:debug-container-2:'
kube::test::get_object_assert pod/target-debug '{{((index (index .spec.ephemeralContainers 1).env 0)).name}}' 'ENV_VAR3'
kube::test::get_object_assert pod/target-debug '{{((index (index .spec.ephemeralContainers 1).env 0)).value}}' 'value3'
kube::test::get_object_assert pod/target-debug '{{((index (index .spec.ephemeralContainers 1).env 1)).name}}' 'ENV_VAR4'
kube::test::get_object_assert pod/target-debug '{{((index (index .spec.ephemeralContainers 1).env 1)).value}}' 'value4'
# Command: create a copy of target with a new debug container
kubectl debug target-debug -it --copy-to=target-copy --image=busybox --container=debug-container-3 --attach=false --profile=general --custom="${TMPDIR:-/tmp}"/custom_profile.json "${kube_flags[@]:?}"
# Post-Conditions
kube::test::get_object_assert pod/target-copy '{{range.spec.containers}}{{.name}}:{{end}}' 'target-debug:debug-container-3:'
kube::test::get_object_assert pod/target-copy '{{((index (index .spec.containers 1).env 0)).name}}' 'ENV_VAR1'
kube::test::get_object_assert pod/target-copy '{{((index (index .spec.containers 1).env 0)).value}}' 'value1'
kube::test::get_object_assert pod/target-copy '{{((index (index .spec.containers 1).env 1)).name}}' 'ENV_VAR2'
kube::test::get_object_assert pod/target-copy '{{((index (index .spec.containers 1).env 1)).value}}' 'value2'
# Clean up
kubectl delete pod target-copy "${kube_flags[@]:?}"
kubectl delete pod target-debug "${kube_flags[@]:?}"
### Debug node with custom profile
# Pre-Condition: node exists
kube::test::get_object_assert nodes "{{range.items}}{{${id_field:?}}}:{{end}}" '127.0.0.1:'
# Command: create a new node debugger pod
output_message=$(kubectl debug --profile general node/127.0.0.1 --image=busybox --custom="${TMPDIR:-/tmp}"/custom_profile.yaml --attach=false "${kube_flags[@]:?}" -- true)
# Post-Conditions
kube::test::get_object_assert pod "{{(len .items)}}" '1'
debugger=$(kubectl get pod -o go-template="{{(index .items 0)${id_field:?}}}")
kube::test::if_has_string "${output_message:?}" "${debugger:?}"
kube::test::get_object_assert "pod/${debugger:?}" "{{${image_field:?}}}" 'busybox'
kube::test::get_object_assert "pod/${debugger:?}" '{{.spec.nodeName}}' '127.0.0.1'
kube::test::get_object_assert "pod/${debugger:?}" '{{((index (index .spec.containers 0).env 0)).name}}' 'ENV_VAR3'
kube::test::get_object_assert "pod/${debugger:?}" '{{((index (index .spec.containers 0).env 0)).value}}' 'value3'
kube::test::get_object_assert "pod/${debugger:?}" '{{((index (index .spec.containers 0).env 1)).name}}' 'ENV_VAR4'
kube::test::get_object_assert "pod/${debugger:?}" '{{((index (index .spec.containers 0).env 1)).value}}' 'value4'
# Clean up
# pod.spec.nodeName is set by kubectl debug node which causes the delete to hang,
# presumably waiting for a kubelet that's not present. Force the delete.
kubectl delete --force pod "${debugger:?}" "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
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