Managing Docker Secrets

To manage Docker Secrets effectively we should know all the following:

  1. Overview of Docker Swarm and its role in managing secrets.
  2. Differences between managing secrets in standalone Docker and Swarm mode.
  3. Enabling Docker Swarm mode for Docker Secrets to work.
  4. Good Practices for Docker Secrets.
  5. Creating Docker Secrets.
  6. Using Docker Secrets.

How To Use Docker Secrets for Secure Credential Management?

In most of the applications, there are some sensitive data present that should not be visible to everyone for example – passwords, certificates, keys, API tokens, db cred, etc. This sensitive data should also not be stored unencrypted in the applications. All this is where Docker Secrets come into the picture – it is simply a way to store this sensitive data in the containers. It can be used to validate and authenticate users and then give them access to the applications.

Similar Reads

Install Docker

Installing docker in Ubuntu is fairly simple. You just need to run these few commands in the terminal:...

Managing Docker Secrets

To manage Docker Secrets effectively we should know all the following:...

Overview of Docker Swarm And Its Role In Managing Secrets

Docker Swarm is just an orchestration service like Kubernetes(K8s) which is used to manage multiple Docker daemons together. Multiple Docker hosts which are running in swarm mode and could serve as both managers (to manage membership and delegation) and workers (to run swarm services) make up a swarm. Any node in the same cluster can deploy and access each container within the Swarm. Any of these Docker hosts have the option to act as both a manager and a worker....

Differences Between Standalone Docker and Swarm Mode

Docker Standalone containers and Swarm mode both are used in deploying applications but still have some significant differences. Some of them are mentioned below:...

Enabling Docker Swarm mode for Docker Secrets to work

One prerequisite for creating/using Docker secrets is to enable swarm mode since Docker Secrets are only available for swarm services. To verify if swarm mode is enabled or not we can run the following command:...

Creating Docker Secrets

Now, since we have swarm mode enabled we can use Docker Secrets and start creating them....

Using Docker Secrets

After creating docker secrets, using them can be done in multiple ways:...

Good Practices for Docker Secrets

Some good practices while using docker secrets:...

Advantages of Docker Secrets

They can store any kind of data if it can be represented in string or binary. They are stored in Docker daemon and are accessible just to the containers that need them and not to all of them. They also offer an abstraction layer between the credentials and the containers. This makes our application code separate from our configurations They also follow the Principle of Least Privileges (PoLP) which ensures users/containers have limited access to specific data in this case to secrets The only limitation for storing data using Docker Secrets is the maximum size that is allowed i.e., 500KB....

Conclusion

In conclusion, we see that any containerized apps need to use secret management provided by Docker carefully. Docker Secrets has many benefits and comes with a mechanism to store sensitive data safely and also separate our code and config. We should just be able to utilize its functionality in an optimum way by following the best practices....