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| 1 | +AWSTemplateFormatVersion: '2010-09-09' |
| 2 | +Description: Lambda function to rotate SSH keys |
| 3 | +Parameters: |
| 4 | + MasterWorkersStack: |
| 5 | + AllowedPattern: ^[a-zA-Z][-a-zA-Z0-9]*$ |
| 6 | + Default: MasterWorkers |
| 7 | + Description: CloudFormation Stack Name for Master and Workers |
| 8 | + MaxLength: 255 |
| 9 | + MinLength: 1 |
| 10 | + Type: String |
| 11 | + TagName: |
| 12 | + AllowedPattern: ^[a-zA-Z][-a-zA-Z0-9]*$ |
| 13 | + Default: RotateSSHKeys |
| 14 | + Description: Tag Name to locate Worker EC2 Instances to update with SSH Public |
| 15 | + Keys |
| 16 | + MaxLength: 255 |
| 17 | + MinLength: 1 |
| 18 | + Type: String |
| 19 | + TagValue: |
| 20 | + Default: 'True' |
| 21 | + Description: Tag Value to locate Worker EC2 Instances to update with SSH Public |
| 22 | + Keys |
| 23 | + MaxLength: 255 |
| 24 | + MinLength: 1 |
| 25 | + Type: String |
| 26 | + Username: |
| 27 | + AllowedPattern: ^[a-z_]([a-z0-9_-]{0,31}|[a-z0-9_-]{0,30}\$)$ |
| 28 | + Default: ec2-user |
| 29 | + Description: Username for the Linux user that is used to log into the Workers |
| 30 | + MaxLength: 32 |
| 31 | + MinLength: 1 |
| 32 | + Type: String |
| 33 | +Resources: |
| 34 | + InvokePermission: |
| 35 | + Properties: |
| 36 | + Action: lambda:InvokeFunction |
| 37 | + FunctionName: |
| 38 | + Ref: RotateSSH |
| 39 | + Principal: secretsmanager.amazonaws.com |
| 40 | + Type: AWS::Lambda::Permission |
| 41 | + RotateSSH: |
| 42 | + Properties: |
| 43 | + CodeUri: s3://awsiammedia/public/sample/SecretsManagerStoreRotateSSHKeyPairs/rotate_ssh.zip |
| 44 | + Description: Rotates SSH Keys |
| 45 | + Environment: |
| 46 | + Variables: |
| 47 | + TAGNAME: |
| 48 | + Ref: TagName |
| 49 | + TAGVALUE: |
| 50 | + Ref: TagValue |
| 51 | + USERNAME: |
| 52 | + Ref: Username |
| 53 | + FunctionName: RotateSSH |
| 54 | + Handler: rotate.lambda_handler |
| 55 | + MemorySize: 1536 |
| 56 | + Policies: |
| 57 | + - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole |
| 58 | + - arn:aws:iam::aws:policy/service-role/AWSLambdaENIManagementAccess |
| 59 | + - Statement: |
| 60 | + - Action: |
| 61 | + - secretsmanager:DescribeSecret |
| 62 | + - secretsmanager:GetSecretValue |
| 63 | + - secretsmanager:PutSecretValue |
| 64 | + - secretsmanager:UpdateSecretVersionStage |
| 65 | + Condition: |
| 66 | + StringEquals: |
| 67 | + secretsmanager:resource/AllowRotationLambdaArn: |
| 68 | + Fn::Sub: arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:RotateSSH |
| 69 | + Effect: Allow |
| 70 | + Resource: |
| 71 | + Fn::Sub: arn:aws:secretsmanager:${AWS::Region}:${AWS::AccountId}:secret:/dev/ssh* |
| 72 | + Sid: SecretsManagerActions |
| 73 | + - Action: |
| 74 | + - ssm:SendCommand |
| 75 | + Effect: Allow |
| 76 | + Resource: |
| 77 | + - Fn::Sub: arn:aws:ssm:${AWS::Region}::document/AWS-RunShellScript |
| 78 | + Sid: SSMRunShellScriptDocument |
| 79 | + - Action: |
| 80 | + - ssm:SendCommand |
| 81 | + Condition: |
| 82 | + StringEquals: |
| 83 | + ssm:resourceTag/RotateSSHKeys: |
| 84 | + Ref: TagValue |
| 85 | + Effect: Allow |
| 86 | + Resource: |
| 87 | + - Fn::Sub: arn:aws:ec2:${AWS::Region}:${AWS::AccountId}:instance/* |
| 88 | + Sid: SSMRunShellScriptOnTaggedInstances |
| 89 | + - Action: |
| 90 | + - ssm:ListCommandInvocations |
| 91 | + - ssm:GetCommandInvocation |
| 92 | + - ssm:ListCommands |
| 93 | + - ssm:DescribeInstanceInformation |
| 94 | + Effect: Allow |
| 95 | + Resource: '*' |
| 96 | + Sid: SSMTrackCommands |
| 97 | + - Action: |
| 98 | + - ec2:DescribeInstances |
| 99 | + Effect: Allow |
| 100 | + Resource: '*' |
| 101 | + Sid: EC2DescribeInstances |
| 102 | + Version: '2012-10-17' |
| 103 | + Runtime: python3.6 |
| 104 | + Timeout: 300 |
| 105 | + VpcConfig: |
| 106 | + SecurityGroupIds: |
| 107 | + - Fn::ImportValue: |
| 108 | + Fn::Sub: ${MasterWorkersStack}-MasterSecurityGroup |
| 109 | + SubnetIds: |
| 110 | + - Fn::ImportValue: |
| 111 | + Fn::Sub: ${MasterWorkersStack}-PrivateSubnet |
| 112 | + Type: AWS::Serverless::Function |
| 113 | +Transform: AWS::Serverless-2016-10-31 |
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