kong api gateways with docker

#docker #api #microservices #kong

KONG is a api gateway placed above the microservices aimed to managing the APIs and interactions external and internal with them in a more rational, efficient, safe and "easy" way, helping the developer in the separation between public and private APIs, improving their performance , facilitating monitoring etc ...

Some Characteristic:

Built on NGINX
For the most part written in LUA
Expandable via many Plugins
It supports two types of Datastores, which can also be used simultaneously (Postgres, cassandra)

Advantages:

Easy management of APIs in a Microservice architecture
helps in the separation between Public and Private APIs
allows to measure and possibly limit the use of these APIs.
Improves performance / through the use of caching etc ...)
Expandable through many plugins

The best way for move the fists step with KONG is using docker:

first, create and internal network for the dockers:

docker network create kong-net

create a container for cassandra db:

docker run -d --name kong-cassandra-database \
              --network=kong-net \
              -p 9042:9042 \
              cassandra:3

create a postgre sql container:

docker run -d --name kong-postgres-database \
              --network=kong-net \
              -p 5432:5432 \
              -e "POSTGRES_USER=kong" \
              -e "POSTGRES_DB=kong" \
              postgres:9.6

create a migration:

docker run --rm \
    --network=kong-net \
    -e "KONG_DATABASE=postgres" \
    -e "KONG_PG_HOST=kong-postgres-database" \
    -e "KONG_CASSANDRA_CONTACT_POINTS=kong-postgres-database" \
    kong:latest kong migrations up

create a kong container connected to the postgres and cassandra databases throught the internal network kong-net:

docker run -d --name kong \
    --network=kong-net \
    -e "KONG_DATABASE=postgres" \
    -e "KONG_PG_HOST=kong-postgres-database" \
    -e "KONG_CASSANDRA_CONTACT_POINTS=kong-cassandra-database" \
    -e "KONG_PROXY_ACCESS_LOG=/dev/stdout" \
    -e "KONG_ADMIN_ACCESS_LOG=/dev/stdout" \
    -e "KONG_PROXY_ERROR_LOG=/dev/stderr" \
    -e "KONG_ADMIN_ERROR_LOG=/dev/stderr" \
    -e "KONG_ADMIN_LISTEN=0.0.0.0:8001, 0.0.0.0:8444 ssl" \
    -p 8000:8000 \
    -p 8443:8443 \
    -p 8001:8001 \
    -p 8444:8444 \
    kong:latest

check on url http://localhost:8001/

For more info, go on official web site here