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c7n-left-0.1.7
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مشاهده بیشترتوضیحات
Custodian policies for IAAC definitions
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | c7n-left-0.1.7 |
| نام | c7n-left |
| نسخه کتابخانه | 0.1.7 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Cloud Custodian Project |
| ایمیل نویسنده | - |
| آدرس صفحه اصلی | https://cloudcustodian.io |
| آدرس اینترنتی | https://pypi.org/project/c7n-left/ |
| مجوز | Apache-2 |
# Custodian policies for Infrastructure Code
This package allows cloud custodian to evaluate policies directly
against infrastructure as code source assets.
It also provides a separate cli for better command line ux for
source asset evaluation.
## Install
We currently only support python > 3.10 on mac and linux, to run on windows
we recommend using our docker images.
```shell
pip install c7n_left
```
We also provide signed docker images. These images are built on top of chainguard's [wolfi linux
distribution](https://www.chainguard.dev/unchained/introducing-wolfi-the-first-linux-un-distro) which
is designed to be minimal, auditable, and secure.
```shell
docker pull cloudcustodian/c7n_left:dev
```
Images signatures can be verified using [cosign](https://github.com/sigstore/cosign)
```
export IMAGE=$(docker image inspect cloudcustodian/c7n-left:dev -f '{{index .RepoDigests 0}}')
cosign verify $IMAGE \
--certificate-identity 'https://github.com/cloud-custodian/cloud-custodian/.github/workflows/docker.yml@refs/heads/main' \
--certificate-oidc-issuer 'https://token.actions.githubusercontent.com'
```
## Usage
```shell
❯ c7n-left run --help
Usage: c7n-left run [OPTIONS]
evaluate policies against IaC sources.
c7n-left -p policy_dir -d terraform_root --filters "severity=HIGH"
WARNING - CLI interface subject to change.
Options:
--format TEXT
--filters TEXT filter policies or resources as k=v pairs
with globbing
-p, --policy-dir PATH
-d, --directory PATH
-o, --output [cli|github|json]
--output-file FILENAME
--output-query TEXT
--summary [policy|resource]
--help Show this message and exit.
```
We'll create an empty directory with a policy in it
```yaml
policies:
- name: test
resource: terraform.aws_s3_bucket
metadata:
severity: medium
filters:
- server_side_encryption_configuration: absent
```
And now we can use it to evaluate a terraform root module
```shell
❯ c7n-left run -p policies -d module
Running 1 policies on 1 resources
test - terraform.aws_s3_bucket
Failed
File: s3.tf:1-8
1 resource "aws_s3_bucket" "example" {
2 bucket = "my-custodian-test-bucket"
3 acl = "private"
4
5 tags = {
6 original-tag = "original-value"
7 }
8 }
Evaluation complete 0.00 seconds -> 1 Failures
Summary - By Policy
┏━━━━━━━━━━┳━━━━━━━━┳━━━━━━━━━━━━━━━━━━━┓
┃ Severity ┃ Policy ┃ Result ┃
┡━━━━━━━━━━╇━━━━━━━━╇━━━━━━━━━━━━━━━━━━━┩
│ medium │ test │ 1 failed 0 passed │
└──────────┴────────┴───────────────────┘
0 compliant of 1 total, 1 resource has 1 policy violation
```
For running in docker, you'll need to use volume mounts to provide access to
the policy directory and terraform root module.
```shell
docker run -ti --rm -v $(pwd)/policies:/policies -v $(pwd)/root-module:/module \
cloudcustodian/c7n-left:dev run -p /policies -d /module
```
If the terraform root module has other remote module dependencies, you'll need to fetch those first using terraform
before running c7n-left.
```shell
terraform get -update
```
## CLI Filters
Which policies and which resources are evaluated can be controlled via
command line via `--filters` option.
Available filters
- `name` - policy name
- `category` - policy category
- `severity` - minimum policy severity (unknown, low, medium, high, critical)
- `type` - resource type, ie. aws_security_group
- `id` - resource id ie. aws_vpc.example
Multiple values for a given filter can be specified as comma separate values, and all filters
except severity support globbing.
Examples
```
# run all encryption policies on ebs volumes and sqs queues
c7n-left run -p policy_dir -d terraform --filters="category=encryption type=aws_ebs_volume,aws_sqs_queue"
# run all medium and higher level policies cost policies
c7n-left run -p policy_dir -d terraform --filters="severity=medium category=cost"
```
policy values for severity and category are specified in its metadata section. ie
```yaml
policies:
- name: check-encryption
resource: [aws_ebs_volume, aws_sqs_queue]
metadata:
category: [encryption, security]
severity: high
filters:
- kms_master_key_id: absent
```
## Outputs
if your using this in github actions, we have special output mode
for reporting annotations directly into pull requests with `--output github`
We also display a summary output after displaying resource matches, there are
two summary displays available, the default policy summary, and a resource summary
which can be enabled via `--summary resource`.
## Policy Language
Policies for c7n-left support a few additional capabilities beyond what's common for custodian policies.
Policies can be specified against multiple resource types either as an array or glob.
```yaml
policies:
- name: check-encryption
resource: [aws_ebs_volume, aws_sqs_queue]
```
A `traverse` filter is available that allows for multi-hop graph traversal from a resource
to any related resource.
ie, here's a policy against an aws ec2 instance, that checks if any of the security
groups attached to the instance, have a permission defined that allows access from
0.0.0.0/0
```yaml
policies:
- name: check-security-group-open-cidr
resource: terraform.aws_instance
description: "EC2 should not be open to world on ssh"
filters:
- type: traverse
resources:
- aws_security_group
- aws_security_ingress_permission
attrs:
- Ipv4: 0.0.0.0/0
```
## Policy Testing
c7n-left supports writing and running tests for policies.
To create a test for a policy, create a tests directory next to your policy files.
Within that tests directory, create a sub directory with the policy name.
Next add terraform files to this sub directory. Typically you would add
both terraform files that would match the policy and those that should not.
Finally you add assertions in a `left.plan[.yaml|.json]` file. The
format of the file is an array of dictionaries. The dictionaries are
used to match against the policy findings. The data its matching
against is what is found by using `c7n-left run --output json`. Each
key/value pair in the dictionary is matched against the finding.
So putting it all together, we've setup our tests as follows
```shell
❯ tree policy-dir-a/
policy-dir-a/
├── alb.yaml
└── tests
└── alb-deletion-protection-disabled
├── left.plan.yaml
├── negative1.tf
└── positive1.tf
3 directories, 4 files
❯ cat policy-dir-a/alb.yaml
policies:
- name: alb-deletion-protection-disabled
resource: [terraform.aws_lb, terraform.aws_alb]
description: |
Application Load Balancer should have deletion protection enabled
metadata:
severity: low
category: "Insecure Configurations"
filters:
- enable_deletion_protection: empty
❯ cat policy-dir-a/tests/alb-deletion-protection-disabled/left.plan.yaml
- "resource.__tfmeta.filename": "positive1.tf"
```
and now we can run a test
```shell
❯ c7n-left test -p policy-dir-a/
Discovered 1 Tests
Failure alb-deletion-protection-disabled [{'resource.__tfmeta.filename':
'positive1.tf'}] checks not used
1 Test Complete (0.05s) 1 Failure
```
A test fails if either an assertion in the plan file does not match one policy finding, or if a policy finding is not matched by an assertion.
نیازمندی
| مقدار | نام |
|---|---|
| ==0.9.26 | c7n |
| ==1.26.109 | boto3 |
| ==4.17.3 | jsonschema |
| ==3.0.5 | argcomplete |
| ==2.8.2 | python-dateutil |
| ==6.0 | pyyaml |
| ==0.9.0 | tabulate |
| ==5.2.0 | importlib-metadata |
| ==0.18.1 | docutils |
| ==1.29.109 | botocore |
| ==1.0.1 | jmespath |
| ==0.6.0 | s3transfer |
| ==22.2.0 | attrs |
| ==5.12.0 | importlib-resources |
| ==1.3.10 | pkgutil-resolve-name |
| ==0.19.3 | pyrsistent |
| ==4.5.0 | typing-extensions |
| ==1.16.0 | six |
| ==3.15.0 | zipp |
| ==1.26.15 | urllib3 |
| ==8.1.3 | click |
| ==13.3.3 | rich |
| ==0.5.0 | tfparse |
| ==0.4.6 | colorama |
| ==2.2.0 | markdown-it-py |
| ==2.14.0 | pygments |
| ==1.15.1 | cffi |
| ==0.1.2 | mdurl |
| ==2.21 | pycparser |
زبان مورد نیاز
| مقدار | نام |
|---|---|
| >=3.7,<4.0 | Python |
نحوه نصب
نصب پکیج whl c7n-left-0.1.7:
pip install c7n-left-0.1.7.whl
نصب پکیج tar.gz c7n-left-0.1.7:
pip install c7n-left-0.1.7.tar.gz