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AWSTemplateFormatVersion: 2010-09-09
Description: >-
  Amazon ECS Service for Nextcloud with Serverless RDS, EFS & S3

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
    - Label:
        default: 'Deployment Identifiers'
      Parameters:
      - DeploymentName
    - Label:
        default: 'Nextcloud Configuration'
      Parameters:
      - NextCloudAdminUser
      - NextCloudAdminPassword
      - NextCloudVersion
    - Label:
        default: 'Database Configuration'
      Parameters:
      - DbUserName
      - DbPassword
      - NextCloudDbName
      - DbMinCapacity
      - DbMaxCapacity
    - Label:
        default: 'AWS ECS Configuration'
      Parameters:
      - EcsTaskCpu
      - EcsTaskMem
      - EcsCapacityProvider
      - EcsMinCapacity
      - EcsInitialDesiredCapacity
      - EcsMaxCapacity
      - EcsTargetCpuUtilization
      - SuspendAutoScaling
    - Label:
        default: 'ElastiCache Redis Configuration'
      Parameters:
      - RedisTshirtSize
    - Label:
        default: 'VPC Configuration'
      Parameters:
      - IsolationLevel
    - Label:
        default: 'Custom Domain Configuration (optional)'
      Parameters:
      - Domain
      - Route53Zone

Parameters:
  DeploymentName:
    Description: Deployment Name (Unique name, no punctuation)
    Type: String
    Default: nc-serverless
  Route53Zone:
    Description: Route53 Public Hosted Zone ID to configure custom domain
    Type: String
    Default: ""
  Domain:
    Description: Speficy a full quallified domain name to use with this Nextcloud deployment
    Type: String
    Default: ""
  DbUserName:
    Description: Database Master Username
    Type: String
    AllowedPattern: ^[a-zA-Z0-9]{6,32}
    Default: nextcloud
  DbPassword:
    Description: Database Master Password
    Type: String
    NoEcho: True
  DbMinCapacity:
    Description: Minimal Aurora Capacity Units Provisioned
    Type: Number
    MinValue: 2
    MaxValue: 384
    Default: 2
  DbMaxCapacity:
    Description: Maxmimal Aurora Capacity Units Provisioned
    Type: Number
    MinValue: 2
    MaxValue: 384
    Default: 8
  NextCloudAdminUser:
    Description: Initial Nextcloud Admin User
    Type: String
    AllowedPattern: ^[a-zA-Z0-9]{6,32}
    Default: ncadmin
  NextCloudAdminPassword:
    Description: Initial Nextcloud Admin Password (change after first login)
    Type: String
    NoEcho: True
  NextCloudDbName:
    Description: Nextcloud Database Name
    Type: String
    AllowedPattern: ^[a-zA-Z0-9]{6,32}
    Default: nextcloud
  NextCloudVersion:
    Description: Nextcloud Version to be deployed (no downgrade possible)
    Type: String
    Default: 21.0.1
  S3SecretRotationSerial:
    Description: In order to rotate long-term S3 credentials increase by 1
    Type: Number
    Default: 1
  IsolationLevel:
    Description: VPC Isolation Level (see README.md)
    Type: String
    Default: Private
    AllowedValues:
    - PrivateHA
    - Private
    - Public
  EcsCapacityProvider:
    Description: Optional select Spot Fargate Tasks for Development Environments
    Type: String
    Default: FARGATE
    AllowedValues:
    - FARGATE_SPOT
    - FARGATE
  EcsTaskCpu:
    Description: CPU Units to provision per ECS Container
    Type: Number
    Default: 1024
    AllowedValues:
    - 256
    - 512
    - 1024
    - 2048
    - 4096
  EcsTaskMem:
    Description: Memory to provision per ECS Container (MB)
    Type: Number
    Default: 2048
  EcsMinCapacity:
    Description: Minimum number of ECS Containers to provision
    Type: Number
    Default: 1
  EcsInitialDesiredCapacity:
    Description: Initial Desired number of ECS Containers to provision
    Type: Number
    Default: 1
  EcsMaxCapacity:
    Description: Maximum number of ECS Containers to provision
    Type: Number
    Default: 25
  EcsTargetCpuUtilization:
    Description: Threshold to be reached for scaling in/out
    Type: Number
    Default: 50
  SuspendAutoScaling:
    Description: Suspend Auto Scaling for Maintanence
    Type: String
    Default: false
  RedisTshirtSize:
    Description: ElasticCache Redis Node Size
    Type: String
    Default: cache.t3.small
    AllowedValues:
    - cache.t3.micro
    - cache.t3.small
    - cache.t3.medium
    - cache.m5.large
    - cache.m5.xlarge
    - cache.m5.2xlarge
    - cache.m5.4xlarge
    - cache.m5.12xlarge
    - cache.m5.24xlarge
    - cache.r5.large
    - cache.r5.xlarge
    - cache.r5.2xlarge
    - cache.r5.4xlarge
    - cache.r5.12xlarge
    - cache.r5.24xlarge

Mappings:
  Config:
    Container:
      Uid: 33
      Gid: 0
      Permission: "0777"

Conditions:
  CustomDomain: !Not [!And [!Equals [!Ref Domain, ""], !Equals [!Ref Route53Zone, ""]]]
  PrivateSubnets: !Not [!Equals [!Ref IsolationLevel, Public]]

Resources:
  VpcStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: https://f7o-quickstart.s3.eu-west-1.amazonaws.com/aws-serverless-nextcloud/simplevpc.yaml
      TimeoutInMinutes: 60
      Parameters:
        EnvironmentName: !Ref DeploymentName
        IsolationLevel: !Ref IsolationLevel

  RdsStack:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: https://f7o-quickstart.s3.eu-west-1.amazonaws.com/aws-serverless-nextcloud/db-cluster.yaml
      TimeoutInMinutes: 60
      Parameters:
        DbUserName: !Ref DbUserName
        DbPassword: !Ref DbPassword
        DbName: nextcloud
        DbMinCapacity: !Ref DbMinCapacity
        DbMaxCapacity: !Ref DbMaxCapacity
        PrivateSubnets: !GetAtt VpcStack.Outputs.PrivateSubnets
        VpcId: !GetAtt VpcStack.Outputs.VPC
        FargateSecGroupId: !Ref EcsSecurityGroup

  EcsCluster:
    Type: 'AWS::ECS::Cluster'
    Properties:
      CapacityProviders:
      - FARGATE
      - FARGATE_SPOT
      Configuration:
        ExecuteCommandConfiguration:
          Logging: DEFAULT

  EcsSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: ECS Security Group
      VpcId: !GetAtt VpcStack.Outputs.VPC

  EcsSecurityGroupHTTPinbound:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Properties:
      GroupId: !Ref EcsSecurityGroup
      IpProtocol: tcp
      FromPort: '80'
      ToPort: '80'
      SourceSecurityGroupId: !Ref ElbSecurityGroup

  CloudwatchLogsGroup:
    Type: 'AWS::Logs::LogGroup'
    Properties:
      LogGroupName: !Join
      - '-'
      - - !Sub ${DeploymentName}
        - !Ref 'AWS::StackName'
      RetentionInDays: 14
  DataBucket:
    DeletionPolicy: Retain
    Type: 'AWS::S3::Bucket'
    Properties:
      VersioningConfiguration:
        Status: Enabled
      BucketEncryption:
        ServerSideEncryptionConfiguration:
        - BucketKeyEnabled: true
          ServerSideEncryptionByDefault:
            SSEAlgorithm: AES256
  BucketUser:
    Type: AWS::IAM::User
    Properties:
      Policies:
      - PolicyName: s3-access
        PolicyDocument:
          Statement:
          - Effect: Allow
            Action:
            - s3:*
            Resource: !Sub arn:aws:s3:::${DataBucket}
          - Effect: Allow
            Action:
            - s3:*
            Resource: !Sub arn:aws:s3:::${DataBucket}/*
          - Effect: Deny
            Action:
            - s3:DeleteBucket*
            - s3:PutBucketPolicy
            - s3:PutEncryptionConfiguration
            Resource: "*"
          - Effect: Allow
            Action:
            - s3:GetBucketLocation
            Resource: arn:aws:s3:::*
  BucketUserCredentials:
    Type: AWS::IAM::AccessKey
    Properties:
      Serial: !Ref S3SecretRotationSerial
      Status: Active
      UserName: !Ref BucketUser

  Efs:
    Type: AWS::EFS::FileSystem
    Properties:
      Encrypted: true
  EfsMountTarget1:
    Type: AWS::EFS::MountTarget
    Properties:
      FileSystemId:
        Ref: Efs
      SubnetId: !Select [0, !Split [ ',', !GetAtt VpcStack.Outputs.PrivateSubnets ]]
      SecurityGroups:
      - Ref: "EfsSecurityGroup"
  EfsMountTarget2:
    Type: AWS::EFS::MountTarget
    Properties:
      FileSystemId:
        Ref: Efs
      SubnetId: !Select [ 1, !Split [ ',', !GetAtt VpcStack.Outputs.PrivateSubnets ] ]
      SecurityGroups:
      - Ref: "EfsSecurityGroup"
  EfsAPNextcloud:
    Type: AWS::EFS::AccessPoint
    Properties:
      FileSystemId: !Ref Efs
      RootDirectory:
        Path: !Sub /${DeploymentName}/nextcloud
        CreationInfo:
          OwnerUid: !FindInMap [Config, Container, Uid]
          OwnerGid: !FindInMap [Config, Container, Gid]
          Permissions: !FindInMap [Config, Container, Permission]
  EfsAPConfig:
    Type: AWS::EFS::AccessPoint
    Properties:
      FileSystemId: !Ref Efs
      RootDirectory:
        Path: !Sub /${DeploymentName}/config
        CreationInfo:
          OwnerUid: !FindInMap [Config, Container, Uid]
          OwnerGid: !FindInMap [Config, Container, Gid]
          Permissions: !FindInMap [Config, Container, Permission]
  EfsAPApps:
    Type: AWS::EFS::AccessPoint
    Properties:
      FileSystemId: !Ref Efs
      RootDirectory:
        Path: !Sub /${DeploymentName}/apps
        CreationInfo:
          OwnerUid: !FindInMap [Config, Container, Uid]
          OwnerGid: !FindInMap [Config, Container, Gid]
          Permissions: !FindInMap [Config, Container, Permission]
  EfsAPData:
    Type: AWS::EFS::AccessPoint
    Properties:
      FileSystemId: !Ref Efs
      RootDirectory:
        Path: !Sub /${DeploymentName}/data
        CreationInfo:
          OwnerUid: !FindInMap [Config, Container, Uid]
          OwnerGid: !FindInMap [Config, Container, Gid]
          Permissions: !FindInMap [Config, Container, Permission]
  EfsSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: ECS Security Group
      VpcId: !GetAtt VpcStack.Outputs.VPC

  EfsSecurityGroupNFSinbound:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Properties:
      GroupId: !Ref EfsSecurityGroup
      IpProtocol: tcp
      FromPort: '2049'
      ToPort: '2049'
      SourceSecurityGroupId: !Ref EcsSecurityGroup
  # https://docs.aws.amazon.com/AmazonECS/latest/developerguide/bind-mounts.html
  EcsTaskDefinition:
    Type: 'AWS::ECS::TaskDefinition'
    Properties:
      Family: !Join
      - ''
      - - !Ref 'AWS::StackName'
        - '-ecs-nextcloud'
      NetworkMode: awsvpc
      RequiresCompatibilities:
      - "FARGATE"
      ExecutionRoleArn: !GetAtt ECSTaskExecRole.Arn
      TaskRoleArn: !GetAtt ECSTaskRole.Arn
      Cpu: !Ref EcsTaskCpu
      Memory: !Ref EcsTaskMem
      ContainerDefinitions:
      - Name: nextcloud
        LogConfiguration:
          LogDriver: awslogs
          Options:
            awslogs-group: !Ref CloudwatchLogsGroup
            awslogs-region: !Ref AWS::Region
            awslogs-stream-prefix: nextcloud
        Environment:
        - Name: POSTGRES_DB
          Value: !Ref NextCloudDbName
        - Name: POSTGRES_USER
          Value: !Ref DbUserName
        - Name: POSTGRES_PASSWORD
          Value: !Ref DbPassword
        - Name: POSTGRES_HOST
          Value: !GetAtt RdsStack.Outputs.EndpointUrl
        - Name: NEXTCLOUD_TRUSTED_DOMAINS
          Value:
            Fn::Sub:
            - ${Domain} ${ElbDomain}
            - ElbDomain: !GetAtt ElasticLoadBalancer.DNSName
        - Name: NEXTCLOUD_ADMIN_USER
          Value: !Ref NextCloudAdminUser
        - Name: NEXTCLOUD_ADMIN_PASSWORD
          Value: !Ref NextCloudAdminPassword
        - Name: OBJECTSTORE_S3_BUCKET
          Value: !Ref DataBucket
        - Name: OBJECTSTORE_S3_REGION
          Value: !Ref AWS::Region
        - Name: OBJECTSTORE_S3_KEY
          Value: !Ref BucketUserCredentials
        - Name: OBJECTSTORE_S3_SECRET
          Value: !GetAtt BucketUserCredentials.SecretAccessKey
        - Name: OVERWRITEPROTOCOL
          Value: !If [CustomDomain, https, http]
        - Name: REDIS_HOST
          Value: !GetAtt RedisReplicationGroup.PrimaryEndPoint.Address
        - Name: REDIS_PORT
          Value: !GetAtt RedisReplicationGroup.PrimaryEndPoint.Port
        PortMappings:
        - HostPort: 80
          Protocol: tcp
          ContainerPort: 80
        MountPoints:
        - ContainerPath: "/var/www/html"
          SourceVolume: nextcloud
        - ContainerPath: "/var/www/html/custom_apps"
          SourceVolume: apps
        - ContainerPath: "/var/www/html/config"
          SourceVolume: config
        - ContainerPath: "/var/www/html/data"
          SourceVolume: data
        Image: !Sub nextcloud:${NextCloudVersion}-apache
        Essential: true
      Volumes:
      - Name: nextcloud
        EFSVolumeConfiguration:
          FilesystemId: !Ref Efs
          AuthorizationConfig:
            AccessPointId: !Ref EfsAPNextcloud
            IAM: ENABLED
          TransitEncryption: ENABLED
      - Name: apps
        EFSVolumeConfiguration:
          FilesystemId: !Ref Efs
          AuthorizationConfig:
            AccessPointId: !Ref EfsAPApps
            IAM: ENABLED
          TransitEncryption: ENABLED
      - Name: config
        EFSVolumeConfiguration:
          FilesystemId: !Ref Efs
          AuthorizationConfig:
            AccessPointId: !Ref EfsAPConfig
            IAM: ENABLED
          TransitEncryption: ENABLED
      - Name: data
        EFSVolumeConfiguration:
          FilesystemId: !Ref Efs
          AuthorizationConfig:
            AccessPointId: !Ref EfsAPData
            IAM: ENABLED
          TransitEncryption: ENABLED

  AlbCertificate:
    Condition: CustomDomain
    Type: AWS::CertificateManager::Certificate
    Properties:
      DomainName: !Ref Domain
      ValidationMethod: DNS
      DomainValidationOptions:
      - DomainName: !Ref Domain
        HostedZoneId: !Ref Route53Zone

  ElbSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: ELB Security Group
      VpcId: !GetAtt VpcStack.Outputs.VPC

  ElbSecurityGroupHTTPSinbound:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Properties:
      GroupId: !Ref ElbSecurityGroup
      IpProtocol: tcp
      FromPort: '443'
      ToPort: '443'
      CidrIp: 0.0.0.0/0

  ElbSecurityGroupHTTPinbound:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Properties:
      GroupId: !Ref ElbSecurityGroup
      IpProtocol: tcp
      FromPort: '80'
      ToPort: '80'
      CidrIp: 0.0.0.0/0

  ElasticLoadBalancer:
    Type: 'AWS::ElasticLoadBalancingV2::LoadBalancer'
    Properties:
      Scheme: internet-facing
      LoadBalancerAttributes:
      - Key: idle_timeout.timeout_seconds
        Value: '30'
      Subnets: !Split [ ',', !GetAtt VpcStack.Outputs.PublicSubnets ]
      SecurityGroups:
      - !Ref ElbSecurityGroup

  Route53AliasRecord:
    Condition: CustomDomain
    Type: AWS::Route53::RecordSet
    Properties:
      AliasTarget:
        DNSName: !GetAtt ElasticLoadBalancer.DNSName
        EvaluateTargetHealth: true
        HostedZoneId: !GetAtt ElasticLoadBalancer.CanonicalHostedZoneID
      Comment: Sso Api Gateway
      HostedZoneId: !Ref Route53Zone
      Name: !Ref Domain
      Type: A

  LoadBalancerListener:
    Type: 'AWS::ElasticLoadBalancingV2::Listener'
    Properties:
      DefaultActions:
        Fn::If:
          - CustomDomain
          - - Type: "redirect"
              RedirectConfig:
                Protocol: "HTTPS"
                Port: 443
                Host: "#{host}"
                Path: "/#{path}"
                Query: "#{query}"
                StatusCode: "HTTP_301"
          - - Type: forward
              TargetGroupArn: !Ref LoadBalancerTargetGroup
      LoadBalancerArn: !Ref ElasticLoadBalancer
      Port: '80'
      Protocol: HTTP

  HttpsLoadBalancerListener:
    Condition: CustomDomain
    Type: 'AWS::ElasticLoadBalancingV2::Listener'
    Properties:
      Certificates:
      - CertificateArn: !Ref AlbCertificate
      DefaultActions:
      - Type: forward
        TargetGroupArn: !Ref LoadBalancerTargetGroup
      LoadBalancerArn: !Ref ElasticLoadBalancer
      Port: '443'
      Protocol: HTTPS

  LoadBalancerListenerRule:
    Type: 'AWS::ElasticLoadBalancingV2::ListenerRule'
    DependsOn: LoadBalancerListener
    Properties:
      Actions:
      - Type: forward
        TargetGroupArn: !Ref LoadBalancerTargetGroup
      Conditions:
      - Field: "path-pattern"
        Values:
        - "/"
      ListenerArn: !Ref LoadBalancerListener
      Priority: 1

  LoadBalancerTargetGroup:
    Type: 'AWS::ElasticLoadBalancingV2::TargetGroup'
    DependsOn: ElasticLoadBalancer
    Properties:
      HealthCheckIntervalSeconds: 10 # This might be keeping the Serverless RDS awake
      HealthCheckPath: /status.php
      HealthCheckProtocol: HTTP
      HealthCheckTimeoutSeconds: 5
      HealthyThresholdCount: 2
      Port: 80
      Protocol: HTTP
      Matcher:
        HttpCode: 200,400
      UnhealthyThresholdCount: 2
      VpcId: !GetAtt VpcStack.Outputs.VPC
      TargetType: ip
      TargetGroupAttributes:
      - Key: deregistration_delay.timeout_seconds
        Value: 60
      - Key: stickiness.enabled
        Value: false

  EcsService:
    DependsOn:
    - LoadBalancerListener
    - EfsMountTarget1
    - EfsMountTarget2
    Type: 'AWS::ECS::Service'
    Properties:
      Cluster: !Ref EcsCluster
      DesiredCount: !Ref EcsInitialDesiredCapacity
      CapacityProviderStrategy:
      - Base: 1
        CapacityProvider: !Ref EcsCapacityProvider
        Weight: 1
      DeploymentConfiguration:
        MaximumPercent: 100
        MinimumHealthyPercent: 0 # Allows service interruption rather than scaling up
      NetworkConfiguration:
        AwsvpcConfiguration:
          AssignPublicIp: !If [PrivateSubnets, DISABLED, ENABLED]
          SecurityGroups:
          - !Ref EcsSecurityGroup
          Subnets: !Split [ ',', !If [PrivateSubnets, !GetAtt VpcStack.Outputs.PrivateSubnets, !GetAtt VpcStack.Outputs.PublicSubnets] ]
      HealthCheckGracePeriodSeconds: 1200
      LoadBalancers:
      - ContainerName: 'nextcloud'
        ContainerPort: '80'
        TargetGroupArn: !Ref LoadBalancerTargetGroup
      SchedulingStrategy: REPLICA
      TaskDefinition: !Ref EcsTaskDefinition
      PropagateTags: SERVICE

  ECSTaskRole:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service:
            - ecs-tasks.amazonaws.com
          Action:
          - 'sts:AssumeRole'
      Path: /
      ManagedPolicyArns:
      - arn:aws:iam::aws:policy/CloudWatchLogsFullAccess
      - 'arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceAutoscaleRole'
      Policies:
      - PolicyName: ecs-service
        PolicyDocument:
          Statement:
          - Effect: Allow
            Action:
            - 'elasticloadbalancing:DeregisterInstancesFromLoadBalancer'
            - 'elasticloadbalancing:DeregisterTargets'
            - 'elasticloadbalancing:Describe*'
            - 'elasticloadbalancing:RegisterInstancesWithLoadBalancer'
            - 'elasticloadbalancing:RegisterTargets'
            # TODO: understand permissions needed
            Resource: '*'
          - Effect: Allow
            Action:
            - 'ec2:Describe*'
            - 'ec2:AuthorizeSecurityGroupIngress'
            - "ec2:AttachNetworkInterface"
            - "ec2:CreateNetworkInterface"
            - "ec2:CreateNetworkInterfacePermission"
            - "ec2:DeleteNetworkInterface"
            - "ec2:DeleteNetworkInterfacePermission"
            - "ec2:Describe*"
            - "ec2:DetachNetworkInterface"
            Resource: "*"
          - Effect: Allow
            Action:
            - elasticfilesystem:*
            Resource:
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:file-system/${Efs}
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:access-point/${EfsAPNextcloud}
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:access-point/${EfsAPConfig}
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:access-point/${EfsAPApps}
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:access-point/${EfsAPData}

  ECSTaskExecRole:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service:
            - ecs-tasks.amazonaws.com
          Action:
          - 'sts:AssumeRole'
      Path: /
      ManagedPolicyArns:
      - arn:aws:iam::aws:policy/CloudWatchLogsFullAccess
      - arn:aws:iam::aws:policy/service-role/AmazonECSTaskExecutionRolePolicy
      Policies:
      - PolicyName: ecs-service
        PolicyDocument:
          Statement:
          - Effect: Allow
            Action:
            - elasticfilesystem:*
            Resource:
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:file-system/${Efs}
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:access-point/${EfsAPNextcloud}
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:access-point/${EfsAPConfig}
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:access-point/${EfsAPApps}
            - !Sub arn:aws:elasticfilesystem:${AWS::Region}:${AWS::AccountId}:access-point/${EfsAPData}
          - Effect: Allow
            Action:
            - "ecr:GetAuthorizationToken"
            - "ecr:BatchCheckLayerAvailability"
            - "ecr:GetDownloadUrlForLayer"
            - "ecr:BatchGetImage"
            Resource: "*"
          - Effect: Allow
            Action:
            - s3:*
            Resource: !Sub arn:aws:s3:::${DataBucket}
          - Effect: Allow
            Action:
            - s3:*
            Resource: !Sub arn:aws:s3:::${DataBucket}/*
          - Effect: Deny
            Action:
            - s3:DeleteBucket*
            - s3:PutBucket*
            - s3:PutEncryptionConfiguration
            - s3:CreateBucket
            Resource: "*"
          - Effect: Allow
            Action:
            - s3:GetBucketLocation
            Resource: arn:aws:s3:::*

  Ec2NcRole:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service:
            - ec2.amazonaws.com
          Action:
          - 'sts:AssumeRole'
      Path: /
      ManagedPolicyArns:
      - arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore
      Policies:
      - PolicyName: ecs-service
        PolicyDocument:
          Statement:
          - Effect: Allow
            Action:
            - logs:*
            - elasticfilesystem:*
            Resource: '*'
  InstanceProfile:
    Type: "AWS::IAM::InstanceProfile"
    Properties:
      Path: "/"
      Roles:
      - Ref: Ec2NcRole
  RedisSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: Elasticache Security Group
      VpcId: !GetAtt VpcStack.Outputs.VPC
  RedisSecurityGroupinbound:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Properties:
      GroupId: !Ref RedisSecurityGroup
      IpProtocol: tcp
      FromPort: '6379'
      ToPort: '6379'
      SourceSecurityGroupId: !Ref EcsSecurityGroup
  RedisSubnetGroup:
    Type: 'AWS::ElastiCache::SubnetGroup'
    Properties:
      Description: Redis Subnet Group
      SubnetIds: !Split [ ',', !GetAtt VpcStack.Outputs.PrivateSubnets]
  RedisParameterGroup:
    Type: AWS::ElastiCache::ParameterGroup
    Properties:
      Description: nextcloud param group
      CacheParameterGroupFamily: redis6.x
      Properties:
        cluster-enabled: 'no'
  RedisReplicationGroup:
    DeletionPolicy: Snapshot
    UpdateReplacePolicy: Snapshot
    Type: AWS::ElastiCache::ReplicationGroup
    Properties:
      ReplicationGroupDescription: 'redis cache for nextcloud'
      AutomaticFailoverEnabled: false
      NumCacheClusters: 1
      MultiAZEnabled: false
      CacheNodeType: !Ref RedisTshirtSize
      CacheParameterGroupName: !Ref RedisParameterGroup
      CacheSubnetGroupName: !Ref RedisSubnetGroup
      Engine: redis
      EngineVersion: 6.x
#      NumNodeGroups: 1
#      ReplicasPerNodeGroup: 1
#      NodeGroupConfiguration:
#      - ReplicaCount: 1
      PreferredMaintenanceWindow: 'sat:07:00-sat:08:00'
      SecurityGroupIds:
      - !GetAtt
        - RedisSecurityGroup
        - GroupId
      SnapshotRetentionLimit: 35
      SnapshotWindow: '00:00-03:00'
      AtRestEncryptionEnabled: true
    UpdatePolicy:
      UseOnlineResharding: true
  NextcloudAutoScalingRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service: ecs-tasks.amazonaws.com
          Action: 'sts:AssumeRole'
      ManagedPolicyArns:
      - 'arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceAutoscaleRole'
  NextcloudAutoScalingTarget:
    Type: AWS::ApplicationAutoScaling::ScalableTarget
    Properties:
      MinCapacity: !Ref EcsMinCapacity
      MaxCapacity: !Ref EcsMaxCapacity
      ResourceId: !Join [ '/', [ service, !Ref EcsCluster, !GetAtt EcsService.Name ] ]
      ScalableDimension: ecs:service:DesiredCount
      ServiceNamespace: ecs
      RoleARN: !GetAtt NextcloudAutoScalingRole.Arn
      SuspendedState:
        DynamicScalingInSuspended: !Ref SuspendAutoScaling
        DynamicScalingOutSuspended: !Ref SuspendAutoScaling
        ScheduledScalingSuspended: !Ref SuspendAutoScaling
  NextcloudAutoScalingPolicy:
    Type: AWS::ApplicationAutoScaling::ScalingPolicy
    Properties:
      PolicyName: !GetAtt EcsService.Name
      PolicyType: TargetTrackingScaling
      ScalingTargetId: !Ref NextcloudAutoScalingTarget
      TargetTrackingScalingPolicyConfiguration:
        PredefinedMetricSpecification:
          PredefinedMetricType: ECSServiceAverageCPUUtilization
        ScaleInCooldown: 10
        ScaleOutCooldown: 10
        # Keep things at or lower than a target CPU utilization, for example
        TargetValue: !Ref EcsTargetCpuUtilization
  NextcloudCWDashbard:
    Type: AWS::CloudWatch::Dashboard
    Properties:
      DashboardName: !Sub ${DeploymentName}-nextcloud
      DashboardBody: !Sub |
        {
            "widgets": [
                {
                    "height": 6,
                    "width": 12,
                    "y": 0,
                    "x": 0,
                    "type": "metric",
                    "properties": {
                        "view": "timeSeries",
                        "stacked": false,
                        "metrics": [
                            [ "AWS/ECS", "CPUUtilization", "ServiceName", "${EcsService.Name}", "ClusterName", "${EcsCluster}" ]
                        ],
                        "region": "${AWS::Region}",
                        "title": "ECS-CPUUtilization"
                    }
                },
                {
                    "height": 6,
                    "width": 12,
                    "y": 0,
                    "x": 12,
                    "type": "metric",
                    "properties": {
                        "view": "timeSeries",
                        "stacked": false,
                        "region": "${AWS::Region}",
                        "stat": "Average",
                        "period": 300,
                        "metrics": [
                            [ "AWS/ECS", "MemoryUtilization", "ServiceName", "${EcsService.Name}", "ClusterName", "${EcsCluster}" ]
                        ],
                        "title": "ECS-MemoryUtilization"
                    }
                },
                {
                    "height": 6,
                    "width": 12,
                    "y": 6,
                    "x": 0,
                    "type": "metric",
                    "properties": {
                        "view": "timeSeries",
                        "stacked": false,
                        "region": "${AWS::Region}",
                        "stat": "Average",
                        "period": 300,
                        "metrics": [
                            [ "AWS/RDS", "CPUUtilization", "DBClusterIdentifier", "${RdsStack.Outputs.DBIdentifier}" ]
                        ],
                        "title": "RDS-CPUUtilization"
                    }
                },
                {
                    "height": 6,
                    "width": 12,
                    "y": 6,
                    "x": 12,
                    "type": "metric",
                    "properties": {
                        "view": "timeSeries",
                        "stacked": false,
                        "region": "${AWS::Region}",
                        "stat": "Average",
                        "period": 300,
                        "metrics": [
                            [ "AWS/RDS", "DatabaseConnections", "DBClusterIdentifier", "${RdsStack.Outputs.DBIdentifier}" ]
                        ],
                        "title": "DatabaseConnections"
                    }
                },
                {
                    "height": 6,
                    "width": 12,
                    "y": 12,
                    "x": 0,
                    "type": "metric",
                    "properties": {
                        "metrics": [
                            [ "AWS/EFS", "StorageBytes", "StorageClass", "Standard", "FileSystemId", "${Efs}" ],
                            [ "...", "IA", ".", "." ],
                            [ "...", "Total", ".", "." ]
                        ],
                        "view": "timeSeries",
                        "stacked": false,
                        "region": "${AWS::Region}",
                        "stat": "Average",
                        "period": 300,
                        "title": "EFS-StorageBytes"
                    }
                },
                {
                    "height": 6,
                    "width": 12,
                    "y": 12,
                    "x": 12,
                    "type": "metric",
                    "properties": {
                        "metrics": [
                            [ { "expression": "(m2*100)/m1", "label": "Data write", "id": "e2", "region": "${AWS::Region}" } ],
                            [ { "expression": "(m3*100)/m1", "label": "Data read", "id": "e3", "region": "${AWS::Region}" } ],
                            [ { "expression": "(m4*100)/m1", "label": "Metadata", "id": "e4", "region": "${AWS::Region}" } ],
                            [ "AWS/EFS", "TotalIOBytes", "FileSystemId", "${Efs}", { "id": "m1", "visible": false, "region": "${AWS::Region}" } ],
                            [ "AWS/EFS", "DataWriteIOBytes", "FileSystemId", "${Efs}", { "id": "m2", "visible": false, "region": "${AWS::Region}" } ],
                            [ "AWS/EFS", "DataReadIOBytes", "FileSystemId", "${Efs}", { "id": "m3", "visible": false, "region": "${AWS::Region}" } ],
                            [ "AWS/EFS", "MetadataIOBytes", "FileSystemId", "${Efs}", { "id": "m4", "visible": false, "region": "${AWS::Region}" } ]
                        ],
                        "view": "timeSeries",
                        "stacked": false,
                        "region": "${AWS::Region}",
                        "stat": "Sum",
                        "period": 60,
                        "title": "EFS - Throughput by type"
                    }
                },
                {
                    "height": 6,
                    "width": 12,
                    "y": 18,
                    "x": 0,
                    "type": "metric",
                    "properties": {
                        "view": "timeSeries",
                        "stacked": false,
                        "start": "-P14D",
                        "end": "P0D",
                        "region": "${AWS::Region}",
                        "metrics": [
                            [ "AWS/S3", "BucketSizeBytes", "StorageType", "StandardStorage", "BucketName", "${DataBucket}" ]
                        ],
                        "period": 86400,
                        "stat": "Average",
                        "title": "Data-BucketSizeBytes"
                    }
                },
                {
                    "height": 6,
                    "width": 12,
                    "y": 18,
                    "x": 12,
                    "type": "metric",
                    "properties": {
                        "view": "timeSeries",
                        "stacked": false,
                        "start": "-P14D",
                        "end": "P0D",
                        "region": "${AWS::Region}",
                        "metrics": [
                            [ "AWS/S3", "NumberOfObjects", "StorageType", "AllStorageTypes", "BucketName", "${DataBucket}", { "period": 86400 } ]
                        ],
                        "period": 86400,
                        "stat": "Average",
                        "title": "DataBucket-NumberOfObjects"
                    }
                },
                 {
                     "type": "metric",
                     "x": 0,
                     "y": 24,
                     "width": 12,
                     "height": 6,
                     "properties": {
                         "view": "timeSeries",
                         "stacked": false,
                         "metrics": [
                             [ "AWS/ElastiCache", "CPUUtilization", "CacheClusterId", "${RedisReplicationGroup}-001", "CacheNodeId", "0001" ]
                         ],
                         "region": "${AWS::Region}",
                         "title": "Redis_CPUUtilization"
                     }
                 },
                 {
                     "type": "metric",
                     "x": 12,
                     "y": 24,
                     "width": 12,
                     "height": 6,
                     "properties": {
                         "view": "timeSeries",
                         "stacked": false,
                         "metrics": [
                             [ "AWS/ElastiCache", "DatabaseMemoryUsagePercentage", "CacheClusterId", "${RedisReplicationGroup}-001", "CacheNodeId", "0001" ]
                         ],
                         "region": "${AWS::Region}",
                         "title": "Redis_DatabaseMemoryUsagePercentage"
                     }
                 }
            ]
        }


Outputs:
  CloudWatchDashboardUrl:
    Value: !Sub https://${AWS::Region}.console.aws.amazon.com/cloudwatch/home?region=${AWS::Region}#dashboards:name=${NextcloudCWDashbard}
  LoadBalancerUrl:
    Value: !GetAtt ElasticLoadBalancer.DNSName
  CustomUrl:
    Condition: CustomDomain
    Value: !Sub https://${Domain}