Docker Container List (開発者向けの仕組み)

What is Docker?

Docker is an open-source environment that automates the deployment of applications inside lightweight, portable containers. Containers package the application with all its dependent packages such that it will run exactly the same way irrespective of where the application executes; whether it is on a developer's laptop, a test server, or even in a production environment. Docker brings efficiency by keeping applications isolated from the underlying infrastructure, allowing multiple containers to run parallelly on the same host.

This simplifies scalability and resource management; with Docker, the development-to-production workflow is made easier and streamlined, hence a key player in modern DevOps and CI/CD pipelines.

What is a Container?

A container is a lightweight, self-contained, executable package containing everything needed to run software—from code and runtime to system tools, libraries, and settings in one bundle. This is an isolated environment from the host and other containers but shares the same operating system kernel, making it much more efficient and faster compared to traditional virtual machines.

Docker containers are designed for portability. If a software developer can run it on their laptop for development and a tester can run it on a server for testing, then ideally a cloud environment or production environment can run that same stack of containers. The portability combined with the isolation and scalability of containers makes Docker an essential tool for modern software deployment and CI/CD pipelines.

Containers happen to be the core of Docker's functionality through which developers can assure that applications will work the same, regardless of where they will be deployed.

Listing Docker Containers

Among the operations you will carry out using Docker is listing containers, so you may be able to monitor their status or even manage them better. There are Docker commands for such an action, and this depends on whether you wish to print only running containers or all containers, including stopped ones.

Here is how you can list Docker containers:

docker ps

docker ps

docker ps -a

docker ps -a

docker ps -q

docker ps -q

docker stop $(docker ps -q)

docker stop $(docker ps -q)

docker ps -f "status=exited"

docker ps -f "status=exited"

docker ps --format "{{.ID}}: {{.Names}}"

docker ps --format "{{.ID}}: {{.Names}}"

What is IronSecureDoc?

IronSecureDoc is a document security tool designed to protect sensitive files by providing encryption, redaction, and digital signing features. It lets users secure PDF documents, controlling personal and confidential data in their possession. Some features include password protection, compliance with standards such as PDF/A, and digital certification, which is often used in legal, healthcare, or financial fields. The software is available as a REST API, making it highly integrative into different workflows, and it can be deployed on Docker for scalable, cloud-friendly security solutions.

docker pull ironsoftwareofficial/ironsecuredoc

docker pull ironsoftwareofficial/ironsecuredoc

docker container run --rm -p 8080:8080 -e IronSecureDoc_LicenseKey=<IRONSECUREDOC_LICENSE_KEY> -e ENVIRONMENT=Development -e HTTP_PORTS=8080 ironsoftwareofficial/ironsecuredoc:latest

docker container run --rm -p 8080:8080 -e IronSecureDoc_LicenseKey=<IRONSECUREDOC_LICENSE_KEY> -e ENVIRONMENT=Development -e HTTP_PORTS=8080 ironsoftwareofficial/ironsecuredoc:latest

curl -X 'POST' \
  'http://localhost:8080/v1/document-services/pdfs/encrypt?user_password=demo' \
  -H 'accept: */*' \
  -H 'Content-Type: multipart/form-data' \
  -F 'pdf_file=@test.pdf;type=application/pdf'

curl -X 'POST' \
  'http://localhost:8080/v1/document-services/pdfs/encrypt?user_password=demo' \
  -H 'accept: */*' \
  -H 'Content-Type: multipart/form-data' \
  -F 'pdf_file=@test.pdf;type=application/pdf'

Conclusion

Commands such as 'docker ps' and 'docker ps -a' make the management of Docker containers efficient by allowing easy monitoring, maintenance, and administration of running and stopped containers. Such commands help developers and system administrators filter, format, and manipulate containers in different environments, thereby enabling effective application management.

IronSecureDoc facilitates the deployment and scaling of document security features like encryption, redaction, and digital signing as a Docker container, ensuring maintained performance and security across different platforms. To know more about IronSecureDoc licensing, click here. Moreover, Iron Software offers various products to uplift your development project that you can further learn about here.