====== IAM Policy ======

Developer Policy to allow devs to inspect prod logs but not change deployed code.


===== Policy =====

dev_gr.yaml
<code yaml>
---
AWSTemplateFormatVersion: "2010-09-09"

Description:
  Stack to add policy and group to allow developers limited access to environments for debugging.

Parameters:
  Environment:
    Description: The environment type
    Type: String
    Default: sandbox
    AllowedValues:
      - production
      - dev
      - staging
    ConstraintDescription: must be production, staging or dev

Mappings:
  NameToEnv:
    production:
      Account: "123443211234"
    dev:
      Account: "543223455432"
    staging:
      Account: "987667899876"

Resources:
  Developers:
    Type: AWS::IAM::Group
    Properties:
      GroupName: Devs
      Path: /


  DevsPolicy:
    Type: "AWS::IAM::ManagedPolicy"
    DependsOn: Developers
    Properties:
      Description: Policy to allow minimal access to Staging for Dev
      ManagedPolicyName: "Devs"
      Path: /
      Groups:
        - Devs
      PolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Action:
              - "logs:DescribeDestinations"
              - "logs:DescribeExportTasks"
              - "logs:DescribeLogGroups"
              - "logs:DescribeLogStreams"
              - "logs:DescribeMetricFilters"
              - "logs:DescribeQueries"
              - "logs:DescribeQueryDefinitions"
              - "logs:DescribeResourcePolicies"
              - "logs:DescribeSubscriptionFilters"
              - "logs:ListLogDeliveries"
              - "logs:ListTagsLogGroup"
              - "logs:FilterLogEvents"
              - "logs:GetLogDelivery"
              - "logs:GetLogEvents"
              - "logs:GetLogGroupFields"
              - "logs:GetLogRecord"
              - "logs:GetQueryResults"
              - "logs:StartQuery"
              - "logs:StopQuery"
              - "logs:TestMetricFilter"
            Effect: Allow
            Resource:
              - '*'



          - Action:
              - "lambda:ListAliases"
              - "lambda:ListCodeSigningConfigs"
              - "lambda:ListEventSourceMappings"
              - "lambda:ListFunctionEventInvokeConfigs"
              - "lambda:ListFunctions"
              - "lambda:ListFunctionsByCodeSigningConfig"
              - "lambda:ListLayers"
              - "lambda:ListLayerVersions"
              - "lambda:ListProvisionedConcurrencyConfigs"
              - "lambda:ListVersionsByFunction"
              - "lambda:GetAccountSettings"
              - "lambda:GetAlias"
              - "lambda:GetCodeSigningConfig"
              - "lambda:GetEventSourceMapping"
              - "lambda:GetFunction"
              - "lambda:GetFunctionCodeSigningConfig"
              - "lambda:GetFunctionConcurrency"
              - "lambda:GetFunctionConfiguration"
              - "lambda:GetFunctionEventInvokeConfig"
              - "lambda:GetLayerVersion"
              - "lambda:GetLayerVersionPolicy"
              - "lambda:GetPolicy"
              - "lambda:GetProvisionedConcurrencyConfig"
              - "lambda:ListTags"
              - "lambda:InvokeFunction"
            Effect: Allow
            Resource:
              - '*'

          - Action:
              - "apigateway:GET"
            Effect: Allow
            Resource:
              - "*"

          - Action:
              - "appsync:ListFunctions"
              - "appsync:ListGraphqlApis"
              - "appsync:ListTypes"
              - "appsync:ListDataSources"
              - "appsync:ListApiKeys"
              - "appsync:ListResolversByFunction"
              - "appsync:ListResolvers"
            Effect: Allow
            Resource:
              - '*'


          - Action:
              - "iam:ChangePassword"
              - "iam:ListPolicies"
              - "iam:ListRoleTags"
              - "iam:ListGroupsForUser"
              - "iam:GetAccessKeyLastUsed"
              - "iam:ListRoles"
              - "iam:ListUsers"
              - "iam:ListGroups"
              - "iam:ListRolePolicies"
              - "iam:ListAccessKeys"
              - "iam:ListSSHPublicKeys"
              - "iam:ListAccessKeys"
              - "iam:ListServiceSpecificCredentials"
            Effect: Allow
            Resource:
              - '*'

          - Action:
              - "ssm:DescribeParameters"
              - "ssm:GetParameter"
              - "ssm:GetParameterHistory"
              - "ssm:ListTagsForResource"
            Effect: Allow
            Resource:
              - "*"

          - Action:
              - "s3:Get*"
              - "s3:List*"
            Effect: Allow
            Resource:
              - "*"

          - Action:
              - "cloudformation:Describe*"
              - "cloudformation:EstimateTemplateCost"
              - "cloudformation:Get*"
              - "cloudformation:List*"
              - "cloudformation:ValidateTemplate"
              - "cloudformation:Detect*"
            Effect: Allow
            Resource:
              - "*"

          - Action:
              - "ec2:Describe*"
              - "elasticloadbalancing:Describe*"
              - "cloudwatch:ListMetrics"
              - "cloudwatch:GetMetricStatistics"
              - "cloudwatch:Describe*"
              - "autoscaling:Describe*"
            Effect: Allow
            Resource:
              - "*"

          - Action:
              - "rds:Describe*"
              - "rds:ListTagsForResource"
              - "ec2:DescribeAccountAttributes"
              - "ec2:DescribeAvailabilityZones"
              - "ec2:DescribeInternetGateways"
              - "ec2:DescribeSecurityGroups"
              - "ec2:DescribeSubnets"
              - "ec2:DescribeVpcAttribute"
              - "ec2:DescribeVpcs"
              - "cloudwatch:GetMetricStatistics"
              - "logs:DescribeLogStreams"
              - "logs:GetLogEvents"
            Effect: Allow
            Resource:
              - "*"
</code>



===== Deploy Script =====

Shel script to deploy policy

deploy_stack.sh
<code bash>
#!/bin/bash
#Written Andrew Stringer
#Purpose to deploy a cloudformation stack from the cli.

STACK_NAME='Dev-a'
TEMPLATE_BODY='file://dev_gr.yaml'
REGION='eu-west-2'
PROFILE=$1

TAGS="Key=Name,Value=${STACK_NAME} Key=Build_Method,Value=CloudFormation"

echo "Using ${PROFILE}."

#Test $1 exists
if [ -z "$PROFILE" ]; then
	echo "Your AWS Profile is not set, using default"
	PROFILE=default
fi

# who am i?
aws sts get-caller-identity --profile ${PROFILE}

aws cloudformation update-stack \
        --stack-name ${STACK_NAME} \
        --template-body ${TEMPLATE_BODY} \
        --region ${REGION} \
        --profile ${PROFILE} \
        --capabilities CAPABILITY_NAMED_IAM \
        --tags ${TAGS}
exit
</code>