dockers Troika
- Docker Machine
- Docker Swarm
- Docker Compose
Docker Compose a presentation
Docker Compose is a container defining and running multiple stand-alone application orchestration tools. By Docker Compose you can use a single YAML file to configure multiple application services, with a single command, you can configure all the services all started up.
1.1 Use of three steps Docker Compose
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Use Dockerfile defined environment, which ensures that its run anywhere
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Use docker-compose.yml file defines the service, so that they can run together in a standalone environment
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Run docker-compose up to start using the docker-compose all applications
1.2 Docker Compose can manage the entire life cycle of the application
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Start, stop, rebuild service
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View the running status of the service
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Streaming service log output
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Execute commands on a one-time service
Two Docker Compose installation
2.1 binary installation
Download: https: //github.com/docker/compose/releases
As well as installation, wget can also download the file above, is itself a binary file
[root@docker-server3 ~]# curl -L https://github.com/docker/compose/releases/download/1.25.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
% Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 617 0 617 0 0 470 0 --:--:-- 0:00:01 --:--:-- 470 100 16.2M 100 16.2M 0 0 767k 0 0:00:21 0:00:21 --:--:-- 1622k
[root@docker-server3 ~]# chmod +x /usr/local/bin/docker-compose
[root@docker-server3 ~]# docker-compose --version
docker-compose version 1.25.0, build 0a186604
[root@docker-server3 ~]# mkdir /docker-compose
[root@docker-server3 ~]# cd /docker-compose
2.2 simple to use
Write a simple file dockerpose
[root@docker-server3 docker-compose]# vim docker-compose.yml
version: '3' services: httpd-test: image: httpd:2.4
[root@docker-server3 docker-compose]# docker-compose up -d
Creating network "docker-compose_default" with the default driver Pulling httpd-test (httpd:2.4)... 2.4: Pulling from library/httpd 8ec398bc0356: Already exists 354e6904d655: Pull complete 27298e4c749a: Pull complete 10e27104ba69: Pull complete 36412f6b2f6e: Pull complete Digest: sha256:769018135ba22d3a7a2b91cb89b8de711562cdf51ad6621b2b9b13e95f3798de Status: Downloaded newer image for httpd:2.4 Creating docker-compose_httpd-test_1 ... done
[root@docker-server3 docker-compose]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 06a7e97739b2 httpd:2.4 "httpd-foreground" 4 minutes ago Up 4 minutes 80/tcp docker-compose_httpd-test_1
Delete and then executed, it will got me a different image
[root@docker-server3 docker-compose]# docker rm -f 06a7e97739b2
[root@docker-server3 docker-compose]# docker-compose up -d
[root@docker-server3 docker-compose]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES d184230f2de6 httpd:2.4 "httpd-foreground" 3 seconds ago Up 2 seconds 80/tcp docker-compose_httpd-test_1
While creating two containers, modify compose documents
[root@docker-server3 docker-compose]# vi docker-compose.yml
version: '3' services: httpd-test: image: httpd:2.4 httpd-test-2: image: httpd:2.4 volumes: - "/data:/var/www/html" ports: - "80:80"
[root@docker-server3 docker-compose]# docker-compose up -d
docker-compose_httpd-test_1 is up-to-date Creating docker-compose_httpd-test-2_1 ... done
[root@docker-server3 docker-compose]# cat /data/index.html
just a test
[root@docker-server3 docker-compose]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8b60d28de874 httpd:2.4 "httpd-foreground" 2 minutes ago Up 2 minutes 0.0.0.0:80->80/tcp docker-compose_httpd-test-2_1 d184230f2de6 httpd:2.4 "httpd-foreground" 6 minutes ago Up 6 minutes 80/tcp docker-compose_httpd-test_1
[root@docker-server3 docker-compose]# docker exec -it 8b60d28de874 /bin/bash
root@8b60d28de874:/usr/local/apache2# ls /var/www/html/ ca_download database index.html job_logs psc redis registry secret root@8b60d28de874:/usr/local/apache2# cat /var/www/html/index.html just a test
[root@docker-server3 docker-compose]# vi docker-compose.yml
version: '3' services: httpd-test: image: httpd:2.4 httpd-test-2: image: httpd:2.4 volumes: - "/data:/var/www/html" ports: - "80:80" httpd-test-3: image: httpd:2.4 volumes: - "/data:/usr/local/apache2/htdocs" ports: - "8080:80"
[root@docker-server3 docker-compose]# docker-compose up -d
docker-compose_httpd-test_1 is up-to-date docker-compose_httpd-test-2_1 is up-to-date Creating docker-compose_httpd-test-3_1 ... done
[root@docker-server3 docker-compose]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a3d24a4c5d25 httpd:2.4 "httpd-foreground" 6 seconds ago Up 5 seconds 0.0.0.0:8080->80/tcp docker-compose_httpd-test-3_1 8b60d28de874 httpd:2.4 "httpd-foreground" 4 minutes ago Up 4 minutes 0.0.0.0:80->80/tcp docker-compose_httpd-test-2_1 d184230f2de6 httpd:2.4 "httpd-foreground" 14 minutes ago Up 14 minutes 80/tcp docker-compose_httpd-test_1
[root@docker-server3 docker-compose]# curl http://192.168.132.133:8080
just a test
[root@docker-server3 docker-compose]# echo 111 > /data/111.html
[root@docker-server3 docker-compose]# curl http://192.168.132.133:8080/111.html
111
The short answer is more than a docker operation
2.3 docker-compose the common commands
In a simple example above, we have used docker-compose upto start a docker-compose.yml file defines the service. Just passed docker-compose upthough the service started, when a docker-compose the instruction was executed in the foreground, if it needs to be put in the background, you can use -dparameters:
Compose-up Docker - d background # Docker -compose -f xx.yaml up - d # yml if the file is not docker-compose.yml need to use the -f Force specified Docker - Compose Down # delete container Docker -compose PS # also see the role of the container, but it can only view docker-compose initiated container, use docker run to start the container can not see Docker - Compose Start docker-compose stop docker-compose restart docker-compose logs
[root@docker-server3 docker-compose]# docker-compose down
Stopping docker-compose_httpd-test-3_1 ... done Stopping docker-compose_httpd-test-2_1 ... done Stopping docker-compose_httpd-test_1 ... done Removing docker-compose_httpd-test-3_1 ... done Removing docker-compose_httpd-test-2_1 ... done Removing docker-compose_httpd-test_1 ... done Removing network docker-compose_default
[root@docker-server3 docker-compose]# docker-compose up -d
Creating network "docker-compose_default" with the default driver Creating docker-compose_httpd-test-3_1 ... done Creating docker-compose_httpd-test_1 ... done Creating docker-compose_httpd-test-2_1 ... done
[root@docker-server3 docker-compose]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ddf6b2a8f4bb httpd:2.4 "httpd-foreground" 6 seconds ago Up 5 seconds 0.0.0.0:80->80/tcp docker-compose_httpd-test-2_1 a1dabe398019 httpd:2.4 "httpd-foreground" 6 seconds ago Up 5 seconds 80/tcp docker-compose_httpd-test_1 81030fea5437 httpd:2.4 "httpd-foreground" 6 seconds ago Up 5 seconds 0.0.0.0:8080->80/tcp docker-compose_httpd-test-3_1
[root@docker-server3 docker-compose]# docker-compose ps -a
Name Command State Ports ------------------------------------------------------------------------------- docker-compose_httpd-test-2_1 httpd-foreground Up 0.0.0.0:80->80/tcp docker-compose_httpd-test-3_1 httpd-foreground Up 0.0.0.0:8080->80/tcp docker-compose_httpd-test_1 httpd-foreground Up 80/tcp
Start and stop operation
The front is a brief introduction to the operation of the docker-compose the subsequent careful study docker-compose the syntax and case
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