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tests: k8s: additional policy testing utilities

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1. add_requests_to_policy_settings allows one or more ttrpc requests
   from the Host to the Guest. Example:

add_requests_to_policy_settings "${policy_settings_dir}" \
   "ReadStreamRequest" "WriteStreamRequest"

2. add_copy_from_host_to_policy_settings allows executing on the Guest
   the commands initiated behind the scenes by "kubectl cp" from the
   Host to the Guest. Example:

add_copy_from_host_to_policy_settings "${policy_settings_dir}"

3. add_copy_from_guest_to_policy_settings allows executing on the Guest
   the commands initiated behind the scenes by "kubectl cp" from the
   Guest to the Host. Example:

add_copy_from_guest_to_policy_settings "${policy_settings_dir}" \
   "/tmp/file.txt"

Signed-off-by: Dan Mihai <dmihai@microsoft.com>
This commit is contained in:
Dan Mihai 2024-02-07 22:38:26 +00:00
parent 9a780aa98f
commit 1179306afa
2 changed files with 43 additions and 8 deletions
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3
tests/integration/kubernetes/k8s-attach-handlers.bats
View File

@ -23,9 +23,12 @@ setup() {
# Add policy to yaml
policy_settings_dir="$(create_tmp_policy_settings_dir "${pod_config_dir}")"
display_message="cat /usr/share/message"
exec_command="sh -c ${display_message}"
add_exec_to_policy_settings "${policy_settings_dir}" "${exec_command}"
add_requests_to_policy_settings "${policy_settings_dir}" "ReadStreamRequest"
auto_generate_policy "${policy_settings_dir}" "${yaml_file}"
}

48
tests/integration/kubernetes/tests_common.sh
View File

@ -175,12 +175,44 @@ add_exec_to_policy_settings() {
"${settings_dir}/new-genpolicy-settings.json"
mv "${settings_dir}/new-genpolicy-settings.json" \
"${settings_dir}/genpolicy-settings.json"
# Change genpolicy settings to allow kubectl to read the output of the command being executed.
info "${settings_dir}/genpolicy-settings.json: allowing ReadStreamRequest"
jq '.request_defaults.ReadStreamRequest |= true' \
"${settings_dir}"/genpolicy-settings.json > \
"${settings_dir}"/new-genpolicy-settings.json
mv "${settings_dir}"/new-genpolicy-settings.json \
"${settings_dir}"/genpolicy-settings.json
}
# Change genpolicy settings to allow one or more ttrpc requests from the Host to the Guest.
add_requests_to_policy_settings() {
declare -r settings_dir="$1"
shift
declare -r requests=("$@")
auto_generate_policy_enabled || return 0
for request in ${requests[@]}
do
info "${settings_dir}/genpolicy-settings.json: allowing ${request}"
jq ".request_defaults.${request} |= true" \
"${settings_dir}"/genpolicy-settings.json > \
"${settings_dir}"/new-genpolicy-settings.json
mv "${settings_dir}"/new-genpolicy-settings.json \
"${settings_dir}"/genpolicy-settings.json
done
}
# Change genpolicy settings to allow executing on the Guest VM the commands
# used by "kubectl cp" from the Host to the Guest.
add_copy_from_host_to_policy_settings() {
declare -r genpolicy_settings_dir="$1"
exec_command="test -d /tmp"
add_exec_to_policy_settings "${policy_settings_dir}" "${exec_command}"
exec_command="tar -xmf - -C /tmp"
add_exec_to_policy_settings "${policy_settings_dir}" "${exec_command}"
}
# Change genpolicy settings to allow executing on the Guest VM the commands
# used by "kubectl cp" from the Guest to the Host.
add_copy_from_guest_to_policy_settings() {
declare -r genpolicy_settings_dir="$1"
declare -r copied_file="$2"
exec_command="tar cf - ${copied_file}"
add_exec_to_policy_settings "${policy_settings_dir}" "${exec_command}"
}