docker_practice/compose/compose_file.md

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## Compose
使 `Compose` `docker run`
`docker-compose.yml` YAML
```yaml
version: "3"
services:
webapp:
image: examples/web
ports:
- "80:80"
volumes:
- "/data"
```
`image` `build` Dockerfile
使 `build` `Dockerfile` (`CMD`, `EXPOSE`, `VOLUME`, `ENV` ) `docker-compose.yml`
### `build`
`Dockerfile` docker-compose.yml `Compose` 使
```yaml
version: '3'
services:
webapp:
build: ./dir
```
使 `context` `Dockerfile`
使 `dockerfile` `Dockerfile`
使 `arg`
```yaml
version: '3'
services:
webapp:
build:
context: ./dir
dockerfile: Dockerfile-alternate
args:
buildno: 1
```
使 `cache_from`
```yaml
build:
context: .
cache_from:
- alpine:latest
- corp/web_app:3.14
```
### `cap_add, cap_drop`
capacity
```yaml
cap_add:
- ALL
```
NET_ADMIN
```yaml
cap_drop:
- NET_ADMIN
```
### `command`
```yaml
command: echo "hello world"
```
### `configs`
`Swarm mode` [`Swarm mode`](../swarm_mode/)
### `cgroup_parent`
`cgroup`
cgroup `cgroups_1`
```yaml
cgroup_parent: cgroups_1
```
### `container_name`
使 `项目名称_服务名称_序号`
```yaml
container_name: docker-web-container
```
>: scale Docker
### `deploy`
`Swarm mode` [`Swarm mode`](../swarm_mode/)
### `devices`
```yaml
devices:
- "/dev/ttyUSB1:/dev/ttyUSB0"
```
### `depends_on`
`redis` `db` `web`
```yaml
version: '3'
services:
web:
build: .
depends_on:
- db
- redis
redis:
image: redis
db:
image: postgres
```
>`web` `redis` `db`
### `dns`
`DNS`
```yaml
dns: 8.8.8.8
dns:
- 8.8.8.8
- 114.114.114.114
```
### `dns_search`
`DNS`
```yaml
dns_search: example.com
dns_search:
- domain1.example.com
- domain2.example.com
```
### `tmpfs`
tmpfs
```yaml
tmpfs: /run
tmpfs:
- /run
- /tmp
```
### `env_file`
`docker-compose -f FILE` Compose `env_file`
`environment`
```bash
env_file: .env
env_file:
- ./common.env
- ./apps/web.env
- /opt/secrets.env
```
`#`
```bash
# common.env: Set development environment
PROG_ENV=development
```
### `environment`
使
Compose
```yaml
environment:
RACK_ENV: development
SESSION_SECRET:
environment:
- RACK_ENV=development
- SESSION_SECRET
```
`true|falseyes|no` [](https://yaml.org/type/bool.html) 含义的词汇,最好放到引号里,避免 YAML 自动解析某些内容为对应的布尔语义。这些特定词汇,包括
```bash
y|Y|yes|Yes|YES|n|N|no|No|NO|true|True|TRUE|false|False|FALSE|on|On|ON|off|Off|OFF
```
### `expose`
宿访
```yaml
expose:
- "3000"
- "8000"
```
### `external_links`
>使
`docker-compose.yml` `Compose`
```yaml
external_links:
- redis_1
- project_db_1:mysql
- project_db_1:postgresql
```
### `extra_hosts`
Docker `--add-host` host
```yaml
extra_hosts:
- "googledns:8.8.8.8"
- "dockerhub:52.1.157.61"
```
`/etc/hosts`
```bash
8.8.8.8 googledns
52.1.157.61 dockerhub
```
### `healthcheck`
```yaml
healthcheck:
test: ["CMD", "curl", "-f", "http://localhost"]
interval: 1m30s
timeout: 10s
retries: 3
```
### `image`
ID`Compose`
```yaml
image: ubuntu
image: orchardup/postgresql
image: a4bc65fd
```
### `labels`
Docker metadata
```yaml
labels:
com.startupteam.description: "webapp for a startup team"
com.startupteam.department: "devops department"
com.startupteam.release: "rc3 for v1.0"
```
### `links`
>使
### `logging`
```yaml
logging:
driver: syslog
options:
syslog-address: "tcp://192.168.0.42:123"
```
```yaml
driver: "json-file"
driver: "syslog"
driver: "none"
```
`options`
```yaml
options:
max-size: "200k"
max-file: "10"
```
### `network_mode`
使 `docker run` `--network`
```yaml
network_mode: "bridge"
network_mode: "host"
network_mode: "none"
network_mode: "service:[service name]"
network_mode: "container:[container name/id]"
```
### `networks`
```yaml
version: "3"
services:
some-service:
networks:
- some-network
- other-network
networks:
some-network:
other-network:
```
### `pid`
宿 ID 访
```yaml
pid: "host"
```
### `ports`
使宿 `(HOST:CONTAINER)` 宿
```yaml
ports:
- "3000"
- "8000:8000"
- "49100:22"
- "127.0.0.1:8001:8001"
```
*使 `HOST:CONTAINER` 使 60 `YAML` `xx:yy` 60 *
### `secrets`
`mysql`
```yaml
version: "3.1"
services:
mysql:
image: mysql
environment:
MYSQL_ROOT_PASSWORD_FILE: /run/secrets/db_root_password
secrets:
- db_root_password
- my_other_secret
secrets:
my_secret:
file: ./my_secret.txt
my_other_secret:
external: true
```
### `security_opt`
label
```yaml
security_opt:
- label:user:USER
- label:role:ROLE
```
### `stop_signal`
使 SIGTERM
```yaml
stop_signal: SIGUSR1
```
### `sysctls`
```yaml
sysctls:
net.core.somaxconn: 1024
net.ipv4.tcp_syncookies: 0
sysctls:
- net.core.somaxconn=1024
- net.ipv4.tcp_syncookies=0
```
### `ulimits`
ulimits
65535 20000 40000 root
```yaml
ulimits:
nproc: 65535
nofile:
soft: 20000
hard: 40000
```
### `volumes`
宿 `HOST:CONTAINER` 访 `HOST:CONTAINER:ro`
```yaml
volumes:
- /var/lib/mysql
- cache/:/tmp/cache
- ~/configs:/etc/configs/:ro
```
###
`domainname, entrypoint, hostname, ipc, mac_address, privileged, read_only, shm_size, restart, stdin_open, tty, user, working_dir` `docker run`
```yaml
entrypoint: /code/entrypoint.sh
```
```yaml
user: nginx
```
```yaml
working_dir: /code
```
mac
```yaml
domainname: your_website.com
hostname: test
mac_address: 08-00-27-00-0C-0A
```
```yaml
privileged: true
```
退 `always` `unless-stopped`
```yaml
restart: always
```
root
```yaml
read_only: true
```
```yaml
stdin_open: true
```
```yaml
tty: true
```
###
Compose `.env`
Compose `${MONGO_VERSION}`
```yaml
version: "3"
services:
db:
image: "mongo:${MONGO_VERSION}"
```
`MONGO_VERSION=3.2 docker-compose up` `mongo:3.2` `MONGO_VERSION=2.8 docker-compose up` `mongo:2.8`
`.env` `docker-compose`
`.env`
```bash
# 支持 # 号注释
MONGO_VERSION=3.6
```
`docker-compose up` `mongo:3.6`