Author: Jackie Chen

ELBv2 ALB Security Group Check in Cloud Conformity


We use Cloud Conformity as a compliance check tool against our AWS environments. Recently, there is a new check failed - ELBv2 ALB Security Group, and the given reason is Load Balancer [alb-d-LoadB-XXXXXXXX] is not associated with valid and secure security groups. I have confirmed that the ALB is associated with a valid and security … Continue reading ELBv2 ALB Security Group Check in Cloud Conformity →

Access Specific EC2 behind ALB


When there are multiple EC2 instances running behind the application load balancer, there is no way (at least as the time of writing) to tell the load balancer which instance you want to use. It is all controlled by the pre-defined load_balancing.algorithm.type. load_balancing.algorithm.type - The load balancing algorithm determines how the load balancer selects targets when routing … Continue reading Access Specific EC2 behind ALB →

Service Role for CodeBuild


Do you notice anything that is not right in the following CloudFormation template? ... Resources: CodeBuildServiceRole: # IAM role for the codebuild project. Type: AWS::IAM::Role Properties: RoleName: !Sub ${ProjectName}-CodeBuild-ServiceRole Path: /team-abc/ AssumeRolePolicyDocument: Version: "2012-10-17" Statement: - Action: ['sts:AssumeRole'] Effect: Allow Principal: Service: ['codebuild.amazonaws.com'] Policies: - PolicyName: !Sub ${ProjectName}-CodeBuild-Policy PolicyDocument: Version: "2012-10-17" Statement: - Action: # … Continue reading Service Role for CodeBuild →

Renew AWS credential for a long run AWS CLI process


We use aws s3 sync to synchronise a big mount of files (800,000+ objects) from on-premise to AWS S3 bucket. Due to security restrictions, the Maximum CLI/API session duration is configured for 1 hour. So it is most likely the credential will expire before the sync job is completed. There are generally two places to … Continue reading Renew AWS credential for a long run AWS CLI process →