Example: Use Docker Machine to provision cloud hosts Docker Machine driver plugins are available for many cloud platforms, so you can use Machine to provision cloud hosts. When you use Docker Machine for provisioning, you create cloud hosts with Docker Engine installed on them. You’ll need to install and run Docker Machine, and create an account with the cloud provider. Then you provide account verification, security credentials, and configuration options for the providers as flags to docker-ma

cp Usage: docker cp [OPTIONS] CONTAINER:SRC_PATH DEST_PATH | - docker cp [OPTIONS] SRC_PATH | - CONTAINER:DEST_PATH Copy files/folders between a container and the local filesystem -L, --follow-link Always follow symbol link in SRC_PATH --help Print usage The docker cp utility copies the contents of SRC_PATH to the DEST_PATH. You can copy from the container’s file system to the local machine or the reverse, from the local filesystem to the container. If

Docker and the Device Mapper storage driver Device Mapper is a kernel-based framework that underpins many advanced volume management technologies on Linux. Docker’s devicemapper storage driver leverages the thin provisioning and snapshotting capabilities of this framework for image and container management. This article refers to the Device Mapper storage driver as devicemapper, and the kernel framework as Device Mapper. Note: The Commercially Supported Docker Engine (CS-Engine) running on RHE

Using certificates for repository client verification In Running Docker with HTTPS, you learned that, by default, Docker runs via a non-networked Unix socket and TLS must be enabled in order to have the Docker client and the daemon communicate securely over HTTPS. TLS ensures authenticity of the registry endpoint and that traffic to/from registry is encrypted. This article demonstrates how to ensure the traffic between the Docker registry (i.e., a server) and the Docker daemon (i.e., a client)

Run a local registry mirror The original content was deprecated. An archived version is available in the 1.7 documentation. For information about configuring mirrors with the latest Docker Registry version, please file a support request with the Distribution project.

Controlling startup order in Compose You can control the order of service startup with the depends_on option. Compose always starts containers in dependency order, where dependencies are determined by depends_on, links, volumes_from and network_mode: "service:...". However, Compose will not wait until a container is “ready” (whatever that means for your particular application) - only until it’s running. There’s a good reason for this. The problem of waiting for a database (for example) to be re

Dockerizing an apt-cacher-ng service Note: - If you don’t like sudo then see Giving non-root access. - If you’re using OS X or docker via TCP then you shouldn’t use sudo. When you have multiple Docker servers, or build unrelated Docker containers which can’t make use of the Docker build cache, it can be useful to have a caching proxy for your packages. This container makes the second download of any package almost instant. Use the following Dockerfile: # # Build: docker build -t apt-cacher .

attach Usage: docker attach [OPTIONS] CONTAINER Attach to a running container --detach-keys="<sequence>" Set up escape key sequence --help Print usage --no-stdin Do not attach STDIN --sig-proxy=true Proxy all received signals to the process The docker attach command allows you to attach to a running container using the container’s ID or name, either to view its ongoing output or to control it interactively. Y

Understand images, containers, and storage drivers To use storage drivers effectively, you must understand how Docker builds and stores images. Then, you need an understanding of how these images are used by containers. Finally, you’ll need a short introduction to the technologies that enable both images and container operations. Images and layers Each Docker image references a list of read-only layers that represent filesystem differences. Layers are stacked on top of each other to form a base

start Usage: start [SERVICE...] Starts existing containers for a service.