kong简介
Kong 是在客户端和（微）服务间转发API通信的API网关，通过插件扩展功能。Kong 有两个主要组件：
Kong Server ：基于 openresty 的服务器，用来接收 API 请求。
Apache Cassandra或者PG ：用来存储操作数据。
你可以通过增加更多 Kong Server 机器对 Kong 服务进行水平扩展，通过前置的负载均衡器向这些机器分发请求。根据文档描述，两个Cassandra节点就足以支撑绝大多数情况，但如果网络非常拥挤，可以考虑适当增加更多节点。
对于开源社区来说，Kong 中最诱人的一个特性是可以通过插件扩展已有功能，这些插件在 API 请求响应循环的生命周期中被执行。插件使用 Lua 编写，而且 Kong 还有如下几个基础功能：HTTP 基本认证、密钥认证、CORS（ Cross-origin Resource Sharing，跨域资源共享）、TCP、UDP、文件日志、API 请求限流、请求转发以及 nginx 监控。
Kong包可运行在某些 Linux 发行版、Mac OS X 和 Docker 中，无论是本地机还是云端服务器皆可运行。
除了免费的开源版本，Mashape 还提供了付费的企业版，其中包括技术支持、使用培训服务以及 API 分析插件。
Paste_Image.png
kong安装
官网提供了多种安装方式https://getkong.org/install/，采用yum或者docker安装较为方便。docker安装需要先安装数据库，本文使用PG数据库。
安装过程
因为现场网络不通在家里测试环境安装好save下，在现场load使用即可。使用了export和import装载是报错，因为安装时也没有进行其他配置，索性使用save进行拷贝。
docker save -o kong-database-postgres-docker-9.4.tar.gz docker.io/postgres
docker save -o kong.tar.gz docker.io/kong
docker load -i kong-database-postgres-docker-9.4.tar.gz
docker load -i kong.tar.gz
1. 安装kong
[slview@DEMO:~]$ docker search kong
INDEX NAME DESCRIPTION STARS OFFICIAL AUTOMATED
docker.io docker.io/kong Open-source Microservice & API Management ... 73 [OK]
docker.io docker.io/pgbi/kong-dashboard Web UI for managing your Kong setup. 14 [OK]
docker.io docker.io/pantsel/konga More than just another GUI to KONG Admin API. 3 [OK]
docker.io docker.io/articulate/kong-wait Waits for Cassandra to be connectable befo... 1 [OK]
docker.io docker.io/galacticfog/kong A fork mashape/kong, with a bias towards p... 1 [OK]
docker.io docker.io/littlebaydigital/kong Extension of official docker kong image wi... 1 [OK]
docker.io docker.io/mesoshq/kong Run Kong clusters on Mesos/Marathon! 1 [OK]
docker.io docker.io/wmzhong/docker-kong For adding solutions for clustering... 1 [OK]
docker.io docker.io/anduin/kong kong 0 [OK]
docker.io docker.io/articulate/kong-monit Adds monit to the base kong image. 0 [OK]
docker.io docker.io/bakstad/kong Extension of the official Docker image for... 0 [OK]
docker.io docker.io/cknowles/kong Fork of official repo to ensure logs work ... 0 [OK]
docker.io docker.io/dasudian/kong Build kong docker image. 0 [OK]
docker.io docker.io/derdiedasjojo/kong kong with piwik-log plugin 0 [OK]
docker.io docker.io/derdiedasjojo/kong-conf create an api in kong by making an api-call 0 [OK]
docker.io docker.io/koudaiii/kong docker-kong 0 [OK]
docker.io docker.io/misfit/kong Kong in Docker 0 [OK]
docker.io docker.io/mrsaints/kong-aws An extension of Kong with a plugin that ca... 0 [OK]
docker.io docker.io/mrsaints/kong-dev A test / development sandbox for Kong, a s... 0 [OK]
docker.io docker.io/sikmi/nendo-docker-kong nendo kong 0 [OK]
docker.io docker.io/sneck/kong Kong(Open-Source API Management and Micros... 0 [OK]
docker.io docker.io/supermp/kong Kong 0 [OK]
docker.io docker.io/vikingco/kong Microservice & API Management Layer (https... 0 [OK]
docker.io docker.io/vikingco/kong-admin Standalone Kong Admin Service 0 [OK]
docker.io docker.io/zymbit/kong Mashape Kong 0 [OK]
[slview@DEMO:~]$
[slview@DEMO:~]$
[slview@DEMO:~]$
[slview@DEMO:~]$
[slview@DEMO:~]$ docker pull kong:0.10
Trying to pull repository 192.168.5.249:5000/kong ...
Pulling repository 192.168.5.249:5000/kong
Trying to pull repository docker.io/library/kong ...
sha256:ff6dd0495f1a5b312bff9fd42f6aee6437200a337e190eb0ddc8e5ca83482995: Pulling from docker.io/library/kong
343b09361036: Pull complete
eb953d76e90b: Pull complete
ebdf6ecbe509: Pull complete
24f20231ced9: Pull complete
Digest: sha256:ff6dd0495f1a5b312bff9fd42f6aee6437200a337e190eb0ddc8e5ca83482995
Status: Downloaded newer image for docker.io/kong:0.10
2. 安装PG
[slview@DEMO:~]$ docker search postgres
INDEX NAME DESCRIPTION STARS OFFICIAL AUTOMATED
docker.io docker.io/postgres The PostgreSQL object-relational database ... 3552 [OK]
docker.io docker.io/kiasaki/alpine-postgres PostgreSQL docker image based on Alpine Linux 30 [OK]
docker.io docker.io/abevoelker/postgres Postgres 9.3 + WAL-E + PL/V8 and PL/Python... 10 [OK]
docker.io docker.io/macadmins/postgres Postgres that accepts remote connections b... 8 [OK]
docker.io docker.io/jamesbrink/postgres Highly configurable PostgreSQL container. 5 [OK]
docker.io docker.io/eeacms/postgres Docker image for PostgreSQL (RelStorage re... 4 [OK]
docker.io docker.io/blacklabelops/postgres Postgres Image for Atlassian Applications 3 [OK]
docker.io docker.io/azukiapp/postgres Docker image to run PostgreSQL by Azuki - ... 2 [OK]
docker.io docker.io/clkao/postgres-plv8 Docker image for running PLV8 1.4 on Postg... 2 [OK]
docker.io docker.io/publysher/postgres-s3 A Docker-based solution for Postgres backu... 2 [OK]
docker.io docker.io/2020ip/postgres Docker image for PostgreSQL with PLV8 1 [OK]
docker.io docker.io/eccube/postgres Docker image for PostgreSQL extended local... 1 [OK]
docker.io docker.io/steenzout/postgres Steenzout's docker image packaging for Pos... 1 [OK]
docker.io docker.io/1maa/postgres PostgreSQL base image 0 [OK]
docker.io docker.io/beorc/postgres Ubuntu-based PostgreSQL server 0 [OK]
docker.io docker.io/camptocamp/postgres Docker image for PostgreSQL including some... 0 [OK]
docker.io docker.io/coreroller/postgres official postgres:9.4 image but it adds 2 ... 0 [OK]
docker.io docker.io/debezium/postgres PostgreSQL for use with Debezium change da... 0 [OK]
docker.io docker.io/examus/postgres Postgres with change password 0 [OK]
docker.io docker.io/kobotoolbox/postgres Postgres image for KoBo Toolbox. 0 [OK]
docker.io docker.io/opencog/postgres This is a configured postgres database for... 0 [OK]
docker.io docker.io/studionone/postgres Postgres Docker image with postgres uuid-o... 0 [OK]
docker.io docker.io/timbira/postgres Postgres containers 0 [OK]
docker.io docker.io/travix/postgres A container to run the PostgreSQL database. 0 [OK]
docker.io docker.io/vrtsystems/postgres PostgreSQL image with added init hooks, bu... 0 [OK]
[slview@DEMO:~]$
[slview@DEMO:~]$
[slview@DEMO:~]$
[slview@DEMO:~]$ docker pull postgres:9.4
Trying to pull repository 192.168.5.249:5000/postgres ...
Pulling repository 192.168.5.249:5000/postgres
Trying to pull repository docker.io/library/postgres ...
sha256:8988064772fc8a39f0be47f7f2557788559221b27a51cbba595f23868edbc426: Pulling from docker.io/library/postgres
10a267c67f42: Pull complete
e9a920522e33: Pull complete
6888e696bd71: Pull complete
798096eed143: Pull complete
fb58419959b5: Pull complete
97f9ec09cb68: Pull complete
94972b6e82a0: Pull complete
a281bad165d7: Pull complete
080dd452e4af: Pull complete
e04973558177: Pull complete
79155f9ed5e1: Pull complete
010432309d6c: Pull complete
d1d8761b1fae: Pull complete
Digest: sha256:8988064772fc8a39f0be47f7f2557788559221b27a51cbba595f23868edbc426
Status: Downloaded newer image for docker.io/postgres:9.4
安装后启动
- 启动pg
docker run -d --name kong-database \
-p 5432:5432 \
-e "POSTGRES_USER=kong" \
-e "POSTGRES_DB=kong" \
postgres:9.4
- 启动kong
docker run -d --name kong \
--link kong-database:kong-database \
-e "KONG_DATABASE=postgres" \
-e "KONG_CASSANDRA_CONTACT_POINTS=kong-database" \
-e "KONG_PG_HOST=kong-database" \
-p 8000:8000 \
-p 8443:8443 \
-p 8001:8001 \
-p 7946:7946 \
-p 7946:7946/udp \
kong:0.10
API
- 增加API
strip_uri ：When matching an API via one of the uris prefixes, strip that matching prefix from the upstream URI to be requested. Default: true. 默认会删除uris前缀
curl -i -X POST --url http://127.0.0.1:8001/apis/ --data 'name=iot_user_app' --data 'upstream_url=http://127.0.0.1:16666/' --data 'uris=/getuserinfo,/getnatipmapinfo,/getimeibindinfo' --data 'strip_uri=false'
curl -i -X POST --url http://127.0.0.1:8001/apis/ --data 'name=iot_vpdn_app' --data 'upstream_url=http://127.0.0.1:16666/' --data 'uris=/getvpdnuserinfo,/getvpdnservinfo' --data 'strip_uri=false'
- 删除API
curl -i -X DELETE http://127.0.0.1:8001/apis/iot_user_app
{
data: [
{
uris: [
"/getuserinfo",
"/getnatipmapinfo",
"/getimeibindinfo"
],
id: "65dd8d1a-aea5-449d-a1d4-e705a4c88d1c",
upstream_read_timeout: 60000,
preserve_host: false,
created_at: 1495682904000,
upstream_connect_timeout: 60000,
upstream_url: "http://127.0.0.1:20000/",
strip_uri: false,
https_only: false,
name: "iot_user_app",
http_if_terminated: true,
upstream_send_timeout: 60000,
retries: 5
},
{
uris: [
"/getvpdnuserinfo",
"/getvpdnservinfo"
],
id: "146df495-455d-48dd-a051-eaefacbd7b1e",
upstream_read_timeout: 60000,
preserve_host: false,
created_at: 1495682920000,
upstream_connect_timeout: 60000,
upstream_url: "http://127.0.0.1:16666/",
strip_uri: false,
https_only: false,
name: "iot_vpdn_app",
http_if_terminated: true,
upstream_send_timeout: 60000,
retries: 5
}
],
total: 2
}
- 访问
-bash-4.4$ curl http://127.0.0.1:8000/getuserinfo?Type=hss\&IMSI=46003xxxxx\&REVLP=1
{
"86xxxxxxx": {
"CDMA_IMSI": "46003xxxxxxxxxx",
"ISDN": "86xxxxxxxxx",
"LTE_IMSI": "46011xxxxxxx",
"TYPE": "2/3/4G"
}
}
插件
kong提供了很多插件，一般使用的是授权和流量控制。
- kong插件能力和已装插件查询
插件能力： http://127.0.0.1:8001/plugins/enabled
已装插件：http://127.0.0.1:8001/apis/iot_user_app/plugins
{
enabled_plugins: [
"syslog",
"ldap-auth",
"rate-limiting",
"correlation-id",
"jwt",
"request-termination",
"runscope",
"request-transformer",
"http-log",
"loggly",
"response-transformer",
"basic-auth",
"tcp-log",
"hmac-auth",
"oauth2",
"acl",
"bot-detection",
"udp-log",
"cors",
"file-log",
"ip-restriction",
"datadog",
"request-size-limiting",
"galileo",
"aws-lambda",
"statsd",
"response-ratelimiting",
"key-auth"
]
}
{
data: [
{
api_id: "ff315a1a-d98d-4a62-aad9-7bc6bb063e22",
id: "65146028-c231-4618-82d4-02f8cc2b6e57",
created_at: 1495684427000,
enabled: true,
name: "ip-restriction",
config: {
whitelist: [
"59.43.53.0/24",
"100.66.124.0/24",
"100.66.44.0/24",
"172.16.0.0/18"
]
}
},
{
api_id: "ff315a1a-d98d-4a62-aad9-7bc6bb063e22",
id: "2aa6b021-cf73-4651-9c07-a3d5c60b900f",
created_at: 1495684482000,
enabled: true,
name: "rate-limiting",
config: {
fault_tolerant: true,
limit_by: "consumer",
policy: "cluster",
redis_database: 0,
second: 100,
hour: 6000,
redis_timeout: 2000,
redis_port: 6379
}
},
{
api_id: "ff315a1a-d98d-4a62-aad9-7bc6bb063e22",
id: "c53fa430-1b2a-47e8-a093-3c19a23bd87b",
created_at: 1495684523000,
enabled: true,
name: "request-size-limiting",
config: {
allowed_payload_size: 128
}
}
],
total: 3
}
- 安全插件
通过设置安全插件可以控制IP白名单、黑名单以及ACL来控制访问范围，多个IP段使用逗号分隔：
curl -X POST http://127.0.0.1:8001/apis/iot_user_app/plugins \
--data "name=ip-restriction" \
--data "config.whitelist=59.43.53.0/24,100.66.124.0/24,100.66.44.0/24,172.16.0.0/18"
- 访问速率插件
通过设置访问速率插件可以访问速率，防止访问速率过大造成服务器压力，目前支持每秒、每小时进行限制：
curl -X POST http://127.0.0.1:8001/apis/iot_user_app/plugins \
--data "name=rate-limiting" \
--data "config.second=1000" \
--data "config.hour=60000"
- 访问速率插件
通过设置访问速率插件可以访问速率，防止访问速率过大造成服务器压力，目前支持每秒、每小时进行限制：
curl -X POST http://127.0.0.1:8001/apis/iot_user_app/plugins \
--data "name=rate-limiting" \
--data "config.second=1000" \
--data "config.hour=60000"
- 访问包大小控制
curl -X POST http://127.0.0.1:8001/apis/iot_user_app/plugins \
--data "name=request-size-limiting" \
--data "config.allowed_payload_size=128"
遗留问题
- kong可以做oauth2.0和jwt做鉴权。
- 未进行压力测试，后面再探索吧。
