What Has Changed In The...

### Security Issues The first issue in Docker is the connection between services when it comes to routing, security, or detection. There is limited security in the Docker architecture itself. A user with access to the Docker daemon has root advantage over the host system. ### Orchestration issues Docker can’t manage the container launch order. Though it has an orchestration tool called Docker Swarm, its functionality is limited compared to powerful orchestrators like Kubernetes. Besides, Docker Swarm works only with Docker containers. ### Isolation issues Docker does not provide 100% isolation of resources between containers. And, there could be a mess in the images repository as all the users have the power to change something. ### Reliability Issues The Docker daemon service is responsible for all the work with registries, images, containers, and the kernel. But, a single service means an increased risk of failure. When a daemon process fails, all the running containers are left on their own. ### Firewall Issues Docker interferes with the system firewall by adding its own firewall rules to the system. There is no reliable way to manage network access to the container through the firewall. Additionally, there is an issue when combining Docker with other services that try to manage the firewall, for example, with a VPN client-server. ### Docker Hub Issues Docker Hub registry contains both official and non-official images. Most of the non-official images are poorly built and have vulnerabilities. The authors of such images usually don’t provide any quality guarantees or support either.