lucaslise/docker-api-demo

Build Simples da API

$ docker build . -t example/api

Build da API no Developer Mode com o Compose v2

$ docker-compose up -d

Deploy da API no Swarm Mode - Compose v3

$ docker stack deploy -c docker-compose-prodswarm.yml app

Verificando a distribuição dos containers

$ docker stack ps app

ID                  NAME                IMAGE                          NODE                DESIRED STATE       CURRENT STATE            ERROR               PORTS
lgvwqegtwm8g        app_api.1           msfidelis/example-api:latest   master              Running             Running 39 minutes ago
ulwheogj2wdt        app_api.2           msfidelis/example-api:latest   minion01            Running             Running 38 minutes ago
99sqb1y97ozy        app_api.3           msfidelis/example-api:latest   minion01            Running             Running 38 minutes ago
xom0nytf3v81        app_api.4           msfidelis/example-api:latest   minion02            Running             Running 38 minutes ago

$ docker-machine ip master

Acesse várias vezes:

http://ip-do-cluster/hostname

Escalando a API

Verificando os services disponíveis

$ docker stack services app

ID                  NAME                MODE                REPLICAS            IMAGE
4nzk39qsqb6s        app_api             replicated          4/4                 msfidelis/example-api:latest
docker@master:~$ docker stack services app

$ docker service scale app_api=10
app_api scaled to 10

Podemos olhar novamente agora e...

$ docker stack s app

ID                  NAME                IMAGE                          NODE                DESIRED STATE       CURRENT STATE                ERROR               PORTS
lgvwqegtwm8g        app_api.1           msfidelis/example-api:latest   master              Running             Running 44 minutes ago
ulwheogj2wdt        app_api.2           msfidelis/example-api:latest   minion01            Running             Running 44 minutes ago
99sqb1y97ozy        app_api.3           msfidelis/example-api:latest   minion01            Running             Running 44 minutes ago
xom0nytf3v81        app_api.4           msfidelis/example-api:latest   minion02            Running             Running 44 minutes ago
7p8prtbnwf1r        app_api.5           msfidelis/example-api:latest   master              Running             Running 2 minutes ago
gpk1kl35aq20        app_api.6           msfidelis/example-api:latest   minion02            Running             Running about a minute ago
rzzasl40k5z7        app_api.7           msfidelis/example-api:latest   master              Running             Running 2 minutes ago
cffulgwncuz7        app_api.8           msfidelis/example-api:latest   master              Running             Running 2 minutes ago
t2nvx0i86mz5        app_api.9           msfidelis/example-api:latest   minion01            Running             Running 2 minutes ago
40n0sxtzeba2        app_api.10          msfidelis/example-api:latest   minion02            Running             Running about a minute ago

Atenção

Esse projeto foi criado para demonstrar exemplos de deploy e scaling utilizando Docker. Podemos demonstrar o funcionamento de Load Balances e Auto Scaling fazendo a API responder seu hostname, mostrando que nossas requisições estão sendo atendidas por containers diferentes.

Alguns métodos disponíveis para exemplos:

GET: /

GET: /hostname

GET: /ip

lucaslise / docker-api-demo