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Add integration test for kubectl debug

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This commit is contained in:
Lee Verberne 2020-10-16 13:32:19 +02:00
parent 56833a63c9
commit d0503b228f
2 changed files with 112 additions and 0 deletions
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101
test/cmd/debug.sh Executable file
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@ -0,0 +1,101 @@
#!/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 Copy
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${IMAGE_NGINX:?}" "${kube_flags[@]:?}"
kube::test::get_object_assert pod "{{range.items}}{{${id_field:?}}}:{{end}}" 'target:'
# Command: create a copy of target with a new debug container
kubectl alpha debug target -it --copy-to=target-copy --image=busybox --container=debug-container --attach=false "${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 "${kube_flags[@]:?}"
# Pre-Condition: Pod "nginx" is created
kubectl run target "--image=${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 alpha 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}}{{${id_field:?}}}:{{end}}" 'target:'
kube::test::get_object_assert pod/target '{{(index .spec.containers 0).name}}' 'target'
# Command: copy the pod and replace the image of an existing container
kubectl alpha debug target --image=busybox --container=target --copy-to=target-copy "${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 "${kube_flags[@]:?}"
set +o nounset
set +o errexit
}
run_kubectl_debug_node_tests() {
set -o nounset
set -o errexit
create_and_use_new_namespace
kube::log::status "Testing kubectl debug (pod tests)"
### Node Troubleshooting by Privileged Container
# Pre-Condition: Pod "nginx" is created
kube::test::get_object_assert nodes "{{range.items}}{{${id_field:?}}}:{{end}}" '127.0.0.1:'
# Command: create a new node debugger pod
output_message=$(kubectl alpha debug node/127.0.0.1 --image=busybox --attach=false "${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
}

11
test/cmd/legacy-script.sh
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@ -36,6 +36,7 @@ source "${KUBE_ROOT}/test/cmd/certificate.sh"
source "${KUBE_ROOT}/test/cmd/core.sh"
source "${KUBE_ROOT}/test/cmd/crd.sh"
source "${KUBE_ROOT}/test/cmd/create.sh"
source "${KUBE_ROOT}/test/cmd/debug.sh"
source "${KUBE_ROOT}/test/cmd/delete.sh"
source "${KUBE_ROOT}/test/cmd/diff.sh"
source "${KUBE_ROOT}/test/cmd/discovery.sh"
@ -943,5 +944,15 @@ runTests() {
record_command run_wait_tests
####################
# kubectl debug #
####################
if kube::test::if_supports_resource "${pods}" ; then
record_command run_kubectl_debug_pod_tests
fi
if kube::test::if_supports_resource "${nodes}" ; then
record_command run_kubectl_debug_node_tests
fi
cleanup_tests
}