DependsOn vs links – docker-compose vs ECS task
DependsOn property of ECS container definition is used for container dependencies Links property of docker compose provides service dependencies. We
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User namespace – Why ecs_agent container launch as root owner?
Below is the ECS optimised AMI machine: $ cat /etc/os-release NAME=”Amazon Linux AMI” VERSION=”2018.03″ ID=”amzn” ID_LIKE=”rhel fedora” VERSION_ID=”2018.03″ PRETTY_NAME=”Amazon Linux
Continue readingSYSVInit support for setting cgroup limits
systemd service manager supports cgroups with below commands: systemd-cgls systemd-cgtop systemd-run systemctl set-property # applies the limits to a cgroup
Continue readingVersioning docker images in ECR – tagging
We are versioning master Jenkins(docker image) and storing in ECR with tag 0.1.$(git rev-parse –short head). Does this create collision
Continue readingECS::TaskDefinition – What is the maximum value of ‘Memory’ property?
here in this syntax of “ContainerDefinitions”:[{Memory:500}] in AWS::ECS::TaskDefinition, Memory property refers to virtual address space(hard limit) of docker container process
Continue readingdocker networking – host mode vs bridge mode – port mapping
In production, host mode networking is recommended over bridge mode to avoid packet forwarding overhead. $ docker container run –help
Continue readingHow to delete dangling images in ECR
Docker client running in laptop talks to AWS ECR. After pushing docker image(with test tag) to ECR, more than one
Continue readingWhy group name "docker" is not created on installation of docker on mac?
After running: brew cask install docker UNIX socket file is not part of docker group in my mac laptop(docker host)
Continue readingdocker compose – What does external property signify under networks?
In the below docker-compose file: version: ‘2’ networks: network1: name: my-net driver: bridge external: true What does external property signify?
Continue readingHow to explicitly mention external volume name?
With the below docker-compose: version: ‘2’ volumes: myvolume: external: true networks: network1: name: my-app-net services: someservice: build: context: . volumes:
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