github.com/aspring/packer@v0.8.1-0.20150629211158-9db281ac0f89/website/source/docs/other/environmental-variables.html.markdown (about) 1 --- 2 layout: "docs" 3 page_title: "Environmental Variables for Packer" 4 description: |- 5 Packer uses a variety of environmental variables. 6 --- 7 8 # Environmental Variables for Packer 9 10 Packer uses a variety of environmental variables. A listing and description of each can be found below: 11 12 * `PACKER_CACHE_DIR` - The location of the packer cache. 13 14 * `PACKER_CONFIG` - The location of the core configuration file. The format 15 of the configuration file is basic JSON. 16 See the [core configuration page](/docs/other/core-configuration.html). 17 18 * `PACKER_LOG` - Setting this to any value will enable the logger. 19 See the [debugging page](/docs/other/debugging.html). 20 21 * `PACKER_LOG_PATH` - The location of the log file. Note: `PACKER_LOG` must 22 be set for any logging to occur. See the [debugging page](/docs/other/debugging.html). 23 24 * `PACKER_NO_COLOR` - Setting this to any value will disable color in the terminal. 25 26 * `PACKER_PLUGIN_MAX_PORT` - The maximum port that Packer uses for 27 communication with plugins, since plugin communication happens over 28 TCP connections on your local host. The default is 25,000. 29 See the [core configuration page](/docs/other/core-configuration.html). 30 31 * `PACKER_PLUGIN_MIN_PORT` - The minimum port that Packer uses for 32 communication with plugins, since plugin communication happens 33 over TCP connections on your local host. The default is 10,000. 34 See the [core configuration page](/docs/other/core-configuration.html).