This is a small example for a restful service using golang, mongodb and gorilla.
My lab consist in only one app server and one mongodb server:
Mongodb container: alpine based with default port (27017).
APP container: alpine based with go program executable using port 8080.
First let's create the mongodb docker image.
docker build -f Dockerfile_mongo.dockerfile . --tag aldenso:mongodb-alpineRun one container.
docker run -d --name mongodb -p 27017:27017 -v /vols4docker/mongodb:/data/db \
aldenso:mongodb-alpineNow let's build the app docker image.
Build the binary.
CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-w' -o server .Build the image.
docker build -f Dockerfile_goapi.dockerfile . --tag aldenso:goapi4mongo-alpineexport the mongodb connection info.
export MONGODB_IP="$(docker inspect -f '{{ .NetworkSettings.IPAddress }}' mongodb)"Create the app container.
docker run -d --name goapi4mongo1 -p 8080:8080 -e MONGODB_IP=$MONGODB_IP \
--restart=on-failure aldenso:goapi4mongo-alpineGet the IP of the app container.
export APPSERVER_IP="$(docker inspect -f '{{ .NetworkSettings.IPAddress }}' goapi4mongo1)"List todos:
curl -i http://$APPSERVER_IP:8080/api/todosShow a single todo (replace {id} for the equivalent bson.ObjectIdHex):
curl -i http://$APPSERVER_IP:8080/api/todos/{id} # Replace the {id} with one created before.Add todo:
curl -i -H "Content-Type: application/json" -X POST \
-d '{"name": "Task_14", "completed": false}' \
http://$APPSERVER_IP:8080/api/todosor
curl -i http://$APPSERVER_IP:8080/api/todos -X POST -d @add.jsonwhere add.json file is something like:
{
"name": "Task_14",
"completed": false
}Update todo (replace {id} for the equivalent bson.ObjectIdHex):
curl -i -H "Content-Type: application/json" -X PUT \
-d '{"name": "update_task", "completed": false}' \
http://$APPSERVER_IP:8080/api/todos/{id}or
curl -i http://$APPSERVER_IP:8080/api/todos/{id} -X PUT -d @update.jsonwhere update.json file is something like:
{
"name": "Task_X",
"completed": true
}Delete todo:
curl -i http://$APPSERVER_IP:8080/api/todos/{id} -X DELETESearch todo by name (replace {name} for the equivalent search pattern):
curl -i http://$APPSERVER_IP:8080/api/todos/search/byname/{name}Search todo by status completed (replace {status} for true or false ):
curl -i http://$APPSERVER_IP:8080/api/todos/search/bystatus/{status}Log samples:
2018/02/24 22:11:40 172.17.0.1:56552 GET /api/todos HTTP/1.1 200 4 1.621415ms
2018/02/24 22:11:53 172.17.0.1:56554 POST /api/todos HTTP/1.1 201 0 1.125878748s
2018/02/24 22:13:08 172.17.0.1:56562 GET /api/todos/ HTTP/1.1 404 0 0
2018/02/24 22:13:10 172.17.0.1:56564 GET /api/todos HTTP/1.1 200 160 857.074µs
2018/02/24 22:13:44 172.17.0.1:56568 GET /api/todos/5a91e328d7f8960001a99aeb HTTP/1.1 200 132 1.702964ms
2018/02/24 22:14:40 172.17.0.1:56572 PUT /api/todos/5a91e328d7f8960001a99aeb HTTP/1.1 204 0 37.554697ms
2018/02/24 22:16:34 172.17.0.1:56580 GET /api/todos HTTP/1.1 200 159 898.811µs
2018/02/24 22:18:51 172.17.0.1:56592 GET /api/todos/search/byname/Task HTTP/1.1 200 159 901.338µs
2018/02/24 22:20:20 172.17.0.1:56600 GET /api/todos/search/bystatus/false HTTP/1.1 200 159 1.013693ms
2018/02/24 22:23:01 172.17.0.1:56618 POST /api/todos HTTP/1.1 201 0 907.716µs
2018/02/24 22:26:45 172.17.0.1:56634 GET /api/todos HTTP/1.1 200 314 992.902µs
2018/02/24 22:27:19 172.17.0.1:56640 DELETE /api/todos/5a91e328d7f8960001a99aeb HTTP/1.1 204 0 1.193428ms
2018/02/24 22:27:31 172.17.0.1:56642 DELETE /api/todos/5a91e5c5d7f8960001a99aec HTTP/1.1 204 0 3.093297msAfter playing with the api you can stop the containers.
docker stop goapi4mongo1 mongodbJust for your information, check your new images and you'll confirm the small size of them.
docker imagesREPOSITORY TAG IMAGE ID CREATED SIZE
aldenso goapi4mongo-alpine b9ba2da7dc62 About an hour ago 9.64MB
aldenso mongodb-alpine 0e53354d7bc1 About an hour ago 106MB
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