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# https://docs.docker.com/compose/yml/
# Each service defined in docker-compose.yml must specify exactly one of
# image or build. Other keys are optional, and are analogous to their
# docker run command-line counterparts.
#
# As with docker run, options specified in the Dockerfile (e.g., CMD,
# EXPOSE, VOLUME, ENV) are respected by default - you don't need to
# specify them again in docker-compose.yml.
#
service_name :
# Path to a directory containing a Dockerfile. When the value supplied
# is a relative path, it is interpreted as relative to the location of
# the yml file itself. This directory is also the build context that is
# sent to the Docker daemon.
#
# Compose will build and tag it with a generated name, and use that image
# thereafter.
build : ./
# Add or drop container capabilities. See man 7 capabilities for a full list.
cap_add :
- ALL
cap_drop :
- NET_ADMIN
- SYS_ADMIN
# Override the default command.
command : /usr/bin/start
# A single value, analogous to its docker run counterpart.
cpu_shares : 73
# A single value, analogous to its docker run counterpart.
domainname : foo.com
# Custom DNS servers. Can be a single value or a list.
#
# dns: 8.8.8.8
dns :
- 8.8.8.8
- 9.9.9.9
# Custom DNS search domains. Can be a single value or a list.
#
# dns_search: example.com
dns_search :
- dc1.example.com
- dc2.example.com
# A single value, analogous to its docker run counterpart.
entrypoint : /code/entrypoint.sh
# Add environment variables from a file. Can be a single value or a list.
#
# If you have specified a Compose file with docker-compose -f FILE, paths
# in env_file are relative to the directory that file is in.
#
# Environment variables specified in environment override these values.
#
# Compose expects each line in an env file to be in VAR=VAL format. Lines
# beginning with # (i.e. comments) are ignored, as are blank lines.
#
# env_file: .env
env_file :
- ./common.env
- ./apps/web.env
- /opt/secrets.env
# Add environment variables. You can use either an array or a dictionary.
#
# Environment variables with only a key are resolved to their values on
# the machine Compose is running on, which can be helpful for secret or
# host-specific values.
#
# environment:
# - RACK_ENV=development
# - SESSION_SECRET
environment :
RACK_ENV : development
SESSION_SECRET :
# Expose ports without publishing them to the host machine - they'll only
# be accessible to linked services. Only the internal port can be specified.
expose :
- " 3000"
- " 8000"
# Extend another service, in the current file or another, optionally
# overriding configuration.
extends :
file : common.yml
service : webapp
# Link to containers started outside this docker-compose.yml or even
# outside of Compose, especially for containers that provide shared or
# common services. external_links follow semantics similar to links when
# specifying both the container name and the link alias (CONTAINER:ALIAS).
external_links :
- redis_1
- project_db_1:mysql
- project_db_1:postgresql
# A single value, analogous to its docker run counterpart.
hostname : foo
# Tag or partial image ID. Can be local or remote - Compose will
# attempt to pull if it doesn't exist locally.
image : centos/centos7
# Link to containers in another service. Either specify both the service
# name and the link alias (SERVICE:ALIAS), or just the service name
# (which will also be used for the alias).
#
# An entry with the alias' name will be created in /etc/hosts inside
# containers for this service.
#
# Each linked container injects a set of environment variables, each of
# which begins with the uppercase name of the container.
#
# To see what environment variables are available to a service, run
# docker-compose run SERVICE env.
#
# * name_PORT
# Full URL, e.g. DB_PORT=tcp://172.17.0.5:5432
#
# * name_PORT_num_protocol
# Full URL, e.g. DB_PORT_5432_TCP=tcp://172.17.0.5:5432
#
# * name_PORT_num_protocol_ADDR
# Container's IP address, e.g. DB_PORT_5432_TCP_ADDR=172.17.0.5
#
# * name_PORT_num_protocol_PORT
# Exposed port number, e.g. DB_PORT_5432_TCP_PORT=5432
#
# * name_PORT_num_protocol_PROTO
# Protocol (tcp or udp), e.g. DB_PORT_5432_TCP_PROTO=tcp
#
# * name_NAME
# Fully qualified container name, e.g. DB_1_NAME=/myapp_web_1/myapp_db_1
links :
- db
- db:database
- redis
# A single value, analogous to its docker run counterpart.
mem_limit : 1000000000
# Networking mode. Use the same values as the docker client --net parameter.
#
# net: "bridge"
# net: "none"
# net: "container:[name or id]"
# net: "host"
net : " bridge"
# Sets the PID mode to the host PID mode. This turns on sharing between
# container and the host operating system the PID address space. Containers
# launched with this flag will be able to access and manipulate other
# containers in the bare-metal machine's namespace and vise-versa.
pid : " host"
# Expose ports. Either specify both ports (HOST:CONTAINER), or just the
# container port (a random host port will be chosen).
#
# Note: When mapping ports in the HOST:CONTAINER format, you may experience
# erroneous results when using a container port lower than 60, because YAML
# will parse numbers in the format xx:yy as sexagesimal (base 60). For this
# reason, we recommend always explicitly specifying your port mappings as
# strings.
ports :
- " 3000"
- " 8000:8000"
- " 49100:22"
- " 127.0.0.1:8001:8001"
# A single value, analogous to its docker run counterpart.
privileged : true
# A single value, analogous to its docker run counterpart.
restart : always
# A single value, analogous to its docker run counterpart.
stdin_open : true
# A single value, analogous to its docker run counterpart.
tty : true
# A single value, analogous to its docker run counterpart.
user : postgresql
# Mount paths as volumes, optionally specifying a path on the host machine
# (HOST:CONTAINER), or an access mode (HOST:CONTAINER:ro).
volumes :
- /var/lib/mysql
- cache/:/tmp/cache
- ~/configs:/etc/configs/:ro
# Mount all of the volumes from another service or container.
volumes_from :
- service_name
- container_name
# A single value, analogous to its docker run counterpart.
working_dir : /code
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