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https://github.com/clover/gatekeeper-conftest
conftest plugin that transforms k8s input object to be compatible with gatekeeper policies
https://github.com/clover/gatekeeper-conftest
Last synced: 3 months ago
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conftest plugin that transforms k8s input object to be compatible with gatekeeper policies
- Host: GitHub
- URL: https://github.com/clover/gatekeeper-conftest
- Owner: clover
- License: apache-2.0
- Created: 2021-06-03T18:38:14.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2024-01-26T14:12:18.000Z (10 months ago)
- Last Synced: 2024-07-25T12:50:54.925Z (4 months ago)
- Language: Go
- Size: 27.3 KB
- Stars: 13
- Watchers: 5
- Forks: 2
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-opa - Gatekeeper Conftest plugin - A Conftest plugin that transforms input objects to be compatible with OPA Gatekeeper policies. (Kubernetes / Built with Wasm)
README
# Gatekeeper Conftest plugin
A [Conftest](https://conftest.dev/) plugin that tranforms input objetcs to be compatible with [gatekeeper](https://github.com/open-policy-agent/gatekeeper) policies for pod admission.
The gatekeeper plugin tranforms the `input` object to the `input.review.object` object excepted by gatekeeper rego policies.\
The plugin also extracts the pod spec from a template where applicable (Deployment, DaemonSet, etc).
## Installation
The [releases](https://github.com/clover/gatekeeper-conftest/releases) page provides archive files containing the built binary and plugin.yaml file.\
Install the plugin using the built-in plugin manager by providing the URL to the release artifact.\
For example, installing on macOS:
```
conftest plugin install https://github.com/clover/gatekeeper-conftest/releases/download/v0.1.0/gatekeeper-conftest_0.1.0_Darwin_x86_64.tar.gz
```
Installing from source:
```
$ git clone https://github.com/clover/gatekeeper-conftest.git
$ cd gatekeeper-conftest
$ go build
$ conftest plugin install ./
```
## Usage
The gatekeeper plugin accepts a single kubernetes manifest and an optional file (--parameters) containing values for parameters used in constraint template rego policy.\
Any flags defined after a double dash `--` are passed to `conftest test` directly along with the transformed input.
```
$ conftest gatekeeper [flags] k8s_manifest_file.yaml -- [flags to pass to `conftest test`]
Flags:
-h, --help help for gatekeeper
-p, --parameters string path to file conatining paramater values used in constraint templates
```
### Exit codes
Exit code of 0: No policy failures or warnings.\
Exit code of 3: At least one policy failure.\
Exit code of 5: Plugin failure.
### Exit codes when using the `--fail-on-warn` conftest flag
Exit code of 0: No policy failures or warnings.\
Exit code of 3: No policy failures, but there exists at least one warning.\
Exit code of 4: At least one policy failure.\
Exit code of 5: Plugin failure.
## Example
```
$ conftest gatekeeper --parameters example/parameters.yaml example/k8s_app.yaml -- --policy example/policy/ --all-namespaces --no-fail
FAIL - .gatekeeper-conftest/CronJob_hello_pods.json - k8spspallowprivilegeescalationcontainer - Privilege escalation container is not allowed: hello
FAIL - .gatekeeper-conftest/DaemonSet_fluentd-elasticsearch_pods.json - k8spspallowprivilegeescalationcontainer - Privilege escalation container is not allowed: fluentd-elasticsearch
FAIL - .gatekeeper-conftest/Job_hello_pods.json - k8spspallowprivilegeescalationcontainer - Privilege escalation container is not allowed: hello
FAIL - .gatekeeper-conftest/ReplicaSet_nginx-deployment_pods.json - k8spspallowprivilegeescalationcontainer - Privilege escalation container is not allowed: nginx
FAIL - .gatekeeper-conftest/Deployment_nginx-deployment_pods.json - k8spspallowprivilegeescalationcontainer - Privilege escalation container is not allowed: nginx
FAIL - .gatekeeper-conftest/Deployment_nginx-deployment_pods.json - capabilities - container is not dropping all required capabilities. Container must drop all of ["must_drop"]
FAIL - .gatekeeper-conftest/Job_hello_pods.json - capabilities - container is not dropping all required capabilities. Container must drop all of ["must_drop"]
FAIL - .gatekeeper-conftest/ReplicaSet_nginx-deployment_pods.json - capabilities - container is not dropping all required capabilities. Container must drop all of ["must_drop"]
FAIL - .gatekeeper-conftest/CronJob_hello_pods.json - capabilities - container is not dropping all required capabilities. Container must drop all of ["must_drop"]
FAIL - .gatekeeper-conftest/DaemonSet_fluentd-elasticsearch_pods.json - capabilities - container is not dropping all required capabilities. Container must drop all of ["must_drop"]
FAIL - .gatekeeper-conftest/DaemonSet_fluentd-elasticsearch_pods.json - k8spspprivileged - Privileged container is not allowed: fluentd-elasticsearch, securityContext: {"allowPrivilegeEscalation": true, "privileged": true, "readOnlyRootFilesystem": false, "runAsNonRoot": false, "runAsUser": 0}
FAIL - .gatekeeper-conftest/Deployment_nginx-deployment_pods.json - k8spspreadonlyrootfilesystem - only read-only root filesystem container is allowed: nginx
FAIL - .gatekeeper-conftest/Job_hello_pods.json - k8spspreadonlyrootfilesystem - only read-only root filesystem container is allowed: hello
FAIL - .gatekeeper-conftest/ReplicaSet_nginx-deployment_pods.json - k8spspreadonlyrootfilesystem - only read-only root filesystem container is allowed: nginx
FAIL - .gatekeeper-conftest/DaemonSet_fluentd-elasticsearch_pods.json - k8spspreadonlyrootfilesystem - only read-only root filesystem container is allowed: fluentd-elasticsearch
FAIL - .gatekeeper-conftest/CronJob_hello_pods.json - k8spspreadonlyrootfilesystem - only read-only root filesystem container is allowed: hello
77 tests, 61 passed, 0 warnings, 16 failures, 0 exceptions
```