ECS Service Without Running Tasks
- Query id: 79d745f0-d5f3-46db-9504-bef73e9fd528
- Query name: ECS Service Without Running Tasks
- Platform: CloudFormation
- Severity: Medium
- Category: Availability
- URL: Github
Description¶
ECS Service should have at least 1 task running
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Postitive test num. 1 - yaml file
AWSTemplateFormatVersion: 2010-09-09
Description: Creating ECS service
Parameters:
AppName:
Type: String
Description: Name of app requiring ELB exposure
Default: simple-app
AppContainerPort:
Type: Number
Description: Container port of app requiring ELB exposure
Default: '80'
AppHostPort:
Type: Number
Description: Host port of app requiring ELB exposure
Default: '80'
ServiceName:
Type: String
LoadBalancerName:
Type: String
HealthCheckGracePeriodSeconds:
Type: String
Resources:
cluster:
Type: AWS::ECS::Cluster
taskdefinition:
Type: AWS::ECS::TaskDefinition
Properties:
ContainerDefinitions:
- Name: !Ref AppName
MountPoints:
- SourceVolume: my-vol
ContainerPath: /var/www/my-vol
Image: amazon/amazon-ecs-sample
Cpu: '10'
PortMappings:
- ContainerPort: !Ref AppContainerPort
HostPort: !Ref AppHostPort
EntryPoint:
- /usr/sbin/apache2
- '-D'
- FOREGROUND
Memory: '500'
Essential: true
- Name: busybox
Image: busybox
Cpu: '10'
EntryPoint:
- sh
- '-c'
Memory: '500'
Command:
- >-
/bin/sh -c "while true; do /bin/date > /var/www/my-vol/date; sleep
1; done"
Essential: false
VolumesFrom:
- SourceContainer: !Ref AppName
Volumes:
- Host:
SourcePath: /var/lib/docker/vfs/dir/
Name: my-vol
service:
Type: AWS::ECS::Service
Properties:
Cluster: !Ref cluster
DesiredCount: 0
HealthCheckGracePeriodSeconds: !Ref HealthCheckGracePeriodSeconds
LoadBalancers:
- ContainerName: !Ref AppName
ContainerPort: !Ref AppContainerPort
LoadBalancerName: !Ref elb
PlacementStrategies:
- Type: binpack
Field: memory
- Type: spread
Field: host
PlacementConstraints:
- Type: memberOf
Expression: 'attribute:ecs.availability-zone != us-east-1d'
- Type: distinctInstance
TaskDefinition: !Ref taskdefinition
ServiceName: !Ref ServiceName
Role: !Ref Role
elb:
Type: AWS::ElasticLoadBalancing::LoadBalancer
Properties:
LoadBalancerName: !Ref LoadBalancerName
Listeners:
- InstancePort: !Ref AppHostPort
LoadBalancerPort: '80'
Protocol: HTTP
Subnets:
- !Ref Subnet1
DependsOn: GatewayAttachment
VPC:
Type: AWS::EC2::VPC
Properties:
CidrBlock: 10.0.0.0/24
Subnet1:
Type: AWS::EC2::Subnet
Properties:
VpcId: !Ref VPC
CidrBlock: 10.0.0.0/25
InternetGateway:
Type: AWS::EC2::InternetGateway
GatewayAttachment:
Type: AWS::EC2::VPCGatewayAttachment
Properties:
InternetGatewayId: !Ref InternetGateway
VpcId: !Ref VPC
Role:
Type: AWS::IAM::Role
Properties:
AssumeRolePolicyDocument:
Version: 2008-10-17
Statement:
- Sid: ''
Effect: Allow
Principal:
Service: ecs.amazonaws.com
Action: 'sts:AssumeRole'
ManagedPolicyArns:
- 'arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceRole'
Outputs:
Cluster:
Value: !Ref cluster
Postitive test num. 2 - json file
{
"AWSTemplateFormatVersion": "2010-09-09T00:00:00Z",
"Description": "Creating ECS service",
"Parameters": {
"AppName": {
"Type": "String",
"Description": "Name of app requiring ELB exposure",
"Default": "simple-app"
},
"AppContainerPort": {
"Default": "80",
"Type": "Number",
"Description": "Container port of app requiring ELB exposure"
},
"AppHostPort": {
"Type": "Number",
"Description": "Host port of app requiring ELB exposure",
"Default": "80"
},
"ServiceName": {
"Type": "String"
},
"LoadBalancerName": {
"Type": "String"
},
"HealthCheckGracePeriodSeconds": {
"Type": "String"
}
},
"Resources": {
"cluster": {
"Type": "AWS::ECS::Cluster"
},
"taskdefinition": {
"Type": "AWS::ECS::TaskDefinition",
"Properties": {
"ContainerDefinitions": [
{
"Cpu": "10",
"PortMappings": [
{
"ContainerPort": "AppContainerPort",
"HostPort": "AppHostPort"
}
],
"EntryPoint": [
"/usr/sbin/apache2",
"-D",
"FOREGROUND"
],
"Memory": "500",
"Essential": true,
"Name": "AppName",
"MountPoints": [
{
"SourceVolume": "my-vol",
"ContainerPath": "/var/www/my-vol"
}
],
"Image": "amazon/amazon-ecs-sample"
},
{
"Name": "busybox",
"Image": "busybox",
"Cpu": "10",
"EntryPoint": [
"sh",
"-c"
],
"Memory": "500",
"Command": [
"/bin/sh -c \"while true; do /bin/date \u003e /var/www/my-vol/date; sleep 1; done\""
],
"Essential": false,
"VolumesFrom": [
{
"SourceContainer": "AppName"
}
]
}
],
"Volumes": [
{
"Host": {
"SourcePath": "/var/lib/docker/vfs/dir/"
},
"Name": "my-vol"
}
]
}
},
"elb": {
"Type": "AWS::ElasticLoadBalancing::LoadBalancer",
"Properties": {
"Listeners": [
{
"InstancePort": "AppHostPort",
"LoadBalancerPort": "80",
"Protocol": "HTTP"
}
],
"Subnets": [
"Subnet1"
],
"LoadBalancerName": "LoadBalancerName"
},
"DependsOn": "GatewayAttachment"
},
"VPC": {
"Type": "AWS::EC2::VPC",
"Properties": {
"CidrBlock": "10.0.0.0/24"
}
},
"Subnet1": {
"Type": "AWS::EC2::Subnet",
"Properties": {
"VpcId": "VPC",
"CidrBlock": "10.0.0.0/25"
}
},
"GatewayAttachment": {
"Properties": {
"InternetGatewayId": "InternetGateway",
"VpcId": "VPC"
},
"Type": "AWS::EC2::VPCGatewayAttachment"
},
"Role": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2008-10-17T00:00:00Z",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "ecs.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
},
"ManagedPolicyArns": [
"arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceRole"
]
}
},
"service": {
"Type": "AWS::ECS::Service",
"Properties": {
"LoadBalancers": [
{
"ContainerName": "AppName",
"ContainerPort": "AppContainerPort",
"LoadBalancerName": "elb"
}
],
"DesiredCount": 0,
"HealthCheckGracePeriodSeconds": "HealthCheckGracePeriodSeconds",
"PlacementStrategies": [
{
"Field": "memory",
"Type": "binpack"
},
{
"Type": "spread",
"Field": "host"
}
],
"PlacementConstraints": [
{
"Type": "memberOf",
"Expression": "attribute:ecs.availability-zone != us-east-1d"
},
{
"Type": "distinctInstance"
}
],
"TaskDefinition": "taskdefinition",
"ServiceName": "ServiceName",
"Role": "Role",
"Cluster": "cluster"
}
},
"InternetGateway": {
"Type": "AWS::EC2::InternetGateway"
}
},
"Outputs": {
"Cluster": {
"Value": "cluster"
}
}
}
Code samples without security vulnerabilities¶
Negative test num. 1 - yaml file
AWSTemplateFormatVersion: 2010-09-09
Description: Creating ECS service
Parameters:
AppName:
Type: String
Description: Name of app requiring ELB exposure
Default: simple-app
AppContainerPort:
Type: Number
Description: Container port of app requiring ELB exposure
Default: '80'
AppHostPort:
Type: Number
Description: Host port of app requiring ELB exposure
Default: '80'
ServiceName:
Type: String
LoadBalancerName:
Type: String
HealthCheckGracePeriodSeconds:
Type: String
Resources:
cluster:
Type: AWS::ECS::Cluster
taskdefinition:
Type: AWS::ECS::TaskDefinition
Properties:
ContainerDefinitions:
- Name: !Ref AppName
MountPoints:
- SourceVolume: my-vol
ContainerPath: /var/www/my-vol
Image: amazon/amazon-ecs-sample
Cpu: '10'
PortMappings:
- ContainerPort: !Ref AppContainerPort
HostPort: !Ref AppHostPort
EntryPoint:
- /usr/sbin/apache2
- '-D'
- FOREGROUND
Memory: '500'
Essential: true
- Name: busybox
Image: busybox
Cpu: '10'
EntryPoint:
- sh
- '-c'
Memory: '500'
Command:
- >-
/bin/sh -c "while true; do /bin/date > /var/www/my-vol/date; sleep
1; done"
Essential: false
VolumesFrom:
- SourceContainer: !Ref AppName
Volumes:
- Host:
SourcePath: /var/lib/docker/vfs/dir/
Name: my-vol
service:
Type: AWS::ECS::Service
Properties:
Cluster: !Ref cluster
DeploymentConfiguration:
MaximumPercent: 200
MinimumHealthyPercent: 100
DesiredCount: 0
HealthCheckGracePeriodSeconds: !Ref HealthCheckGracePeriodSeconds
LoadBalancers:
- ContainerName: !Ref AppName
ContainerPort: !Ref AppContainerPort
LoadBalancerName: !Ref elb
PlacementStrategies:
- Type: binpack
Field: memory
- Type: spread
Field: host
PlacementConstraints:
- Type: memberOf
Expression: 'attribute:ecs.availability-zone != us-east-1d'
- Type: distinctInstance
TaskDefinition: !Ref taskdefinition
ServiceName: !Ref ServiceName
Role: !Ref Role
elb:
Type: AWS::ElasticLoadBalancing::LoadBalancer
Properties:
LoadBalancerName: !Ref LoadBalancerName
Listeners:
- InstancePort: !Ref AppHostPort
LoadBalancerPort: '80'
Protocol: HTTP
Subnets:
- !Ref Subnet1
DependsOn: GatewayAttachment
VPC:
Type: AWS::EC2::VPC
Properties:
CidrBlock: 10.0.0.0/24
Subnet1:
Type: AWS::EC2::Subnet
Properties:
VpcId: !Ref VPC
CidrBlock: 10.0.0.0/25
InternetGateway:
Type: AWS::EC2::InternetGateway
GatewayAttachment:
Type: AWS::EC2::VPCGatewayAttachment
Properties:
InternetGatewayId: !Ref InternetGateway
VpcId: !Ref VPC
Role:
Type: AWS::IAM::Role
Properties:
AssumeRolePolicyDocument:
Version: 2008-10-17
Statement:
- Sid: ''
Effect: Allow
Principal:
Service: ecs.amazonaws.com
Action: 'sts:AssumeRole'
ManagedPolicyArns:
- 'arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceRole'
Outputs:
Cluster:
Value: !Ref cluster
Negative test num. 2 - json file
{
"Description": "Creating ECS service",
"Parameters": {
"AppHostPort": {
"Default": "80",
"Type": "Number",
"Description": "Host port of app requiring ELB exposure"
},
"ServiceName": {
"Type": "String"
},
"LoadBalancerName": {
"Type": "String"
},
"HealthCheckGracePeriodSeconds": {
"Type": "String"
},
"AppName": {
"Type": "String",
"Description": "Name of app requiring ELB exposure",
"Default": "simple-app"
},
"AppContainerPort": {
"Type": "Number",
"Description": "Container port of app requiring ELB exposure",
"Default": "80"
}
},
"Resources": {
"taskdefinition": {
"Type": "AWS::ECS::TaskDefinition",
"Properties": {
"ContainerDefinitions": [
{
"EntryPoint": [
"/usr/sbin/apache2",
"-D",
"FOREGROUND"
],
"Memory": "500",
"Essential": true,
"Name": "AppName",
"MountPoints": [
{
"SourceVolume": "my-vol",
"ContainerPath": "/var/www/my-vol"
}
],
"Image": "amazon/amazon-ecs-sample",
"Cpu": "10",
"PortMappings": [
{
"HostPort": "AppHostPort",
"ContainerPort": "AppContainerPort"
}
]
},
{
"VolumesFrom": [
{
"SourceContainer": "AppName"
}
],
"Name": "busybox",
"Image": "busybox",
"Cpu": "10",
"EntryPoint": [
"sh",
"-c"
],
"Memory": "500",
"Command": [
"/bin/sh -c \"while true; do /bin/date \u003e /var/www/my-vol/date; sleep 1; done\""
],
"Essential": false
}
],
"Volumes": [
{
"Host": {
"SourcePath": "/var/lib/docker/vfs/dir/"
},
"Name": "my-vol"
}
]
}
},
"Subnet1": {
"Properties": {
"VpcId": "VPC",
"CidrBlock": "10.0.0.0/25"
},
"Type": "AWS::EC2::Subnet"
},
"InternetGateway": {
"Type": "AWS::EC2::InternetGateway"
},
"Role": {
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2008-10-17T00:00:00Z",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "ecs.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
},
"ManagedPolicyArns": [
"arn:aws:iam::aws:policy/service-role/AmazonEC2ContainerServiceRole"
]
},
"Type": "AWS::IAM::Role"
},
"cluster": {
"Type": "AWS::ECS::Cluster"
},
"service": {
"Type": "AWS::ECS::Service",
"Properties": {
"DesiredCount": 0,
"HealthCheckGracePeriodSeconds": "HealthCheckGracePeriodSeconds",
"LoadBalancers": [
{
"LoadBalancerName": "elb",
"ContainerName": "AppName",
"ContainerPort": "AppContainerPort"
}
],
"PlacementStrategies": [
{
"Type": "binpack",
"Field": "memory"
},
{
"Field": "host",
"Type": "spread"
}
],
"ServiceName": "ServiceName",
"Cluster": "cluster",
"DeploymentConfiguration": {
"MaximumPercent": 200,
"MinimumHealthyPercent": 100
},
"PlacementConstraints": [
{
"Type": "memberOf",
"Expression": "attribute:ecs.availability-zone != us-east-1d"
},
{
"Type": "distinctInstance"
}
],
"TaskDefinition": "taskdefinition",
"Role": "Role"
}
},
"elb": {
"DependsOn": "GatewayAttachment",
"Type": "AWS::ElasticLoadBalancing::LoadBalancer",
"Properties": {
"LoadBalancerName": "LoadBalancerName",
"Listeners": [
{
"Protocol": "HTTP",
"InstancePort": "AppHostPort",
"LoadBalancerPort": "80"
}
],
"Subnets": [
"Subnet1"
]
}
},
"VPC": {
"Properties": {
"CidrBlock": "10.0.0.0/24"
},
"Type": "AWS::EC2::VPC"
},
"GatewayAttachment": {
"Properties": {
"InternetGatewayId": "InternetGateway",
"VpcId": "VPC"
},
"Type": "AWS::EC2::VPCGatewayAttachment"
}
},
"Outputs": {
"Cluster": {
"Value": "cluster"
}
},
"AWSTemplateFormatVersion": "2010-09-09T00:00:00Z"
}