You can use a $$ (double-dollar sign) when your configuration needs a literalĭollar sign. You can use environment variables in configuration values with a Bash-like Specify them again in docker-compose.yml. Likewise, network and volume definitions are analogous toĭocker network create and docker volume create.Īs with docker run, options specified in the Dockerfile, such as CMD,ĮXPOSE, VOLUME, ENV, are respected by default - you don’t need to yaml extension for this file.Ī service definition contains configuration that is applied to eachĬontainer started for that service, much like passing command-line parameters toĭocker run. The latest Compose file format is defined by the Compose Specification and is implemented by Docker Compose 1.27.0+. For example, Compose file formatģ.0 was first introduced in Compose release Itself is on a release schedule, as shown in Composeĭo not necessarily increment with each release. In addition to Compose file format versions shown in the table, the Compose This table shows which Compose file versions support specific Docker releases. How to upgrade, see About versions and upgrading. Docker for Mac recently implemented fs event in their implementation of Kubernetes, which means that if you mount a directory you’ll see notify generating events. For the second issue, it depends on the platform. For full details on what each version includes and You’re right on the first issue, hostPath requires an absolute path. There are several versions of the Compose file format – 1, 2, 2.x, and 3.x. These topics describe version 2 of the Compose file format.
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