Fabio 安装和简单使用

Fabio（Go 语言）：https://github.com/eBay/fabio

Fabio 是一个快速、现代、zero-conf 负载均衡 HTTP(S) 路由器，用于部署 Consul 管理的微服务。

Fabio 由 eBay Classifieds Group 开发，用于处理 marktplaats.nl 和 kijiji.it 的流量。Marktplaats 所有的流量都经过 Fabio ，每秒有 250000 个请求，分发于数个 Fabio 实例，并且没有出现任何延迟。

简单流程图（摘自 http://dockone.io/article/1567）：

======    服务注册     =========       =========
A服务   <------>      consul集群  ---->  健康的 A/不健康的 A 集群
======    健康检查     =========       =========
                                     ^
                                     | 加入/移出路由表
                                     |
                                  ========
                                   fabio 集群
                                  ========
                                     |
                                     | A服务   如果找到则成功路由否则返回错误
                                     V
                                    http 请求

---

Mac OS 安装命令（如果没有安装 Consul，会自动安装）：

$ brew install fabio
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
==> New Formulae
crystal-icr     gcc@4.7         gnome-autoar    libchaos        llvm@3.8        pdftoipe        tomcat@8.0
dbt             gcc@5           isl@0.12        libswiftnav     mps-youtube     recipes         ucg
gcc@4.6         gcc@6           lasso           llvm@3.7        ndenv           servus
==> Updated Formulae
afflib                 dnscrypt-proxy         handbrake              mpv                    sassc
ant                    doxygen                hebcal                 mysql                  sbcl
antigen                duply                  highlight              mysql-connector-c++    sqldiff
antlr                  flex                   hugo                   mysql-sandbox          sqlite
apache-spark           fluent-bit             imagemagick            nagios                 sqlite-analyzer
arangodb               fobis                  ipv6calc               nagios-plugins         stunnel
astyle                 fontforge              jasper                 ncdc                   syncthing
ats2-postiats          fpp                    jenkins                ncftp                  tarantool
aws-sdk-cpp            freetype               lean-cli               neo4j                  taylor
awscli                 ganglia                leptonica              nvm                    tile38
bup                    gcc                    libass                 ooniprobe              vim
cdiff                  gcc@4.9                libgit2                opentsdb               volatility
cfr-decompiler         geos                   libgit2-glib           osm2pgsql              vowpal-wabbit
checkstyle             git-annex              libpng                 osquery                weechat
cloog                  git-lfs                libxml2                pngpaste               wine
compcert               gitg                   lmdb                   poco                   winetricks
couchdb                gitless                m-cli                  pure-ftpd              wireguard-tools
cppcheck               gmic                   macosvpn               qt5                    x265
czmq                   gnome-builder          menhir                 questdb                yaz
dbhash                 gnutls                 mg                     rclone                 youtube-dl
dmd                    groonga                mitmproxy              re2
==> Deleted Formulae
cloog@0.18                            qt                                    tutum

Error: Could not link:
/usr/local/share/man/man1/brew.1

Please delete these paths and run `brew update`.
==> Installing dependencies for fabio: consul
==> Installing fabio dependency: consul
==> Downloading https://homebrew.bintray.com/bottles/consul-0.7.2.sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring consul-0.7.2.sierra.bottle.tar.gz
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink bin/consul
Target /usr/local/bin/consul
already exists. You may want to remove it:
  rm ‘/usr/local/bin/consul‘

To force the link and overwrite all conflicting files:
  brew link --overwrite consul

To list all files that would be deleted:
  brew link --overwrite --dry-run consul

Possible conflicting files are:
/usr/local/bin/consul
==> Caveats
If consul was built with --with-web-ui, you can activate the UI by running
consul with `-ui-dir /usr/local/Cellar/consul/0.7.2/share/consul/web-ui`.

zsh completion has been installed to:
  /usr/local/share/zsh/site-functions

To have launchd start consul now and restart at login:
  brew services start consul
Or, if you don‘t want/need a background service you can just run:
  consul agent -dev -advertise 127.0.0.1
==> Summary
??  /usr/local/Cellar/consul/0.7.2: 5 files, 27.6M
==> Installing fabio 
==> Downloading https://homebrew.bintray.com/bottles/fabio-1.3.5.sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring fabio-1.3.5.sierra.bottle.tar.gz
??  /usr/local/Cellar/fabio/1.3.5: 6 files, 10.1M

Ubuntu 安装比较麻烦点，具体步骤：

1. 创建fabio目录：

$ mkdir /opt/fabio

2. 设置环境变量：

$ export PATH=$PATH:/opt/fabio

3. 创建fabio.properties文件（/opt/fabio工作目录下）：

$ touch fabio.properties

4. 下载 Fabio 文件（地址：https://github.com/eBay/fabio/releases）：

$ wget https://github.com/eBay/fabio/releases/download/v1.3.5/fabio-1.3.5-go1.7.3-linux_amd64

5. 赋予权限：

$ chmod a+x fabio-1.3.5-go1.7.3-linux_amd64

6. 设置fabio命令：

$ ln -s fabio-1.3.5-go1.7.3-linux_amd64 fabio

安装好之后，直接输入命令（启动 Fabio）：

$ fabio
2017/01/04 03:04:44 [INFO] Runtime config
{
    "Proxy": {
        "Strategy": "rnd",
        "Matcher": "prefix",
        "NoRouteStatus": 404,
        "MaxConn": 10000,
        "ShutdownWait": 0,
        "DialTimeout": 30000000000,
        "ResponseHeaderTimeout": 0,
        "KeepAliveTimeout": 0,
        "ReadTimeout": 0,
        "WriteTimeout": 0,
        "FlushInterval": 1000000000,
        "LocalIP": "10.0.2.15",
        "ClientIPHeader": "",
        "TLSHeader": "",
        "TLSHeaderValue": "",
        "GZIPContentTypesValue": "",
        "GZIPContentTypes": null
    },
    "Registry": {
        "Backend": "consul",
        "Static": {
            "Routes": ""
        },
        "File": {
            "Path": ""
        },
        "Consul": {
            "Addr": "localhost:8500",
            "Scheme": "http",
            "Token": "",
            "KVPath": "/fabio/config",
            "TagPrefix": "urlprefix-",
            "Register": true,
            "ServiceAddr": ":9998",
            "ServiceName": "fabio",
            "ServiceTags": null,
            "ServiceStatus": [
                "passing"
            ],
            "CheckInterval": 1000000000,
            "CheckTimeout": 3000000000
        }
    },
    "Listen": [
        {
            "Addr": ":9999",
            "Proto": "http",
            "ReadTimeout": 0,
            "WriteTimeout": 0,
            "CertSource": {
                "Name": "",
                "Type": "",
                "CertPath": "",
                "KeyPath": "",
                "ClientCAPath": "",
                "CAUpgradeCN": "",
                "Refresh": 0,
                "Header": null
            },
            "StrictMatch": false
        }
    ],
    "CertSources": {},
    "Metrics": {
        "Target": "",
        "Prefix": "{{clean .Hostname}}.{{clean .Exec}}",
        "Names": "{{clean .Service}}.{{clean .Host}}.{{clean .Path}}.{{clean .TargetURL.Host}}",
        "Interval": 30000000000,
        "GraphiteAddr": "",
        "StatsDAddr": "",
        "CirconusAPIKey": "",
        "CirconusAPIApp": "fabio",
        "CirconusAPIURL": "",
        "CirconusCheckID": "",
        "CirconusBrokerID": ""
    },
    "UI": {
        "Addr": ":9998",
        "Color": "light-green",
        "Title": ""
    },
    "Runtime": {
        "GOGC": 800,
        "GOMAXPROCS": 1
    },
    "ListenerValue": [
        ":9999"
    ],
    "CertSourcesValue": null
}
2017/01/04 03:04:44 [INFO] Version 1.3.5 starting
2017/01/04 03:04:44 [INFO] Go runtime is go1.7.3
2017/01/04 03:04:44 [INFO] Using routing strategy "rnd"
2017/01/04 03:04:44 [INFO] Using routing matching "prefix"
2017/01/04 03:04:44 [INFO] Setting GOGC=800
2017/01/04 03:04:44 [INFO] Setting GOMAXPROCS=1
2017/01/04 03:04:44 [INFO] Metrics disabled
2017/01/04 03:04:44 [INFO] consul: Connecting to "localhost:8500" in datacenter "dc1"
2017/01/04 03:04:44 [INFO] Admin server listening on ":9998"
2017/01/04 03:04:44 [INFO] HTTP proxy listening on :9999
2017/01/04 03:04:44 [INFO] consul: Using dynamic routes
2017/01/04 03:04:44 [INFO] consul: Using tag prefix "urlprefix-"
2017/01/04 03:04:44 [INFO] consul: Watching KV path "/fabio/config"
    2017/01/04 03:04:44 [INFO] agent: Synced service ‘fabio-vagrant-ubuntu-trusty-9998‘
2017/01/04 03:04:44 [INFO] consul: Registered fabio with id "fabio-vagrant-ubuntu-trusty-9998"
2017/01/04 03:04:44 [INFO] consul: Registered fabio with address "10.0.2.15"
2017/01/04 03:04:44 [INFO] consul: Registered fabio with tags ""
2017/01/04 03:04:44 [INFO] consul: Registered fabio with health check to "http://[10.0.2.15]:9998/health"
2017/01/04 03:04:44 [INFO] consul: Health changed to #5878
2017/01/04 03:04:44 [INFO] consul: Manual config changed to #1
2017/01/04 03:04:44 [INFO] Updated config to
2017/01/04 03:04:44 [INFO] consul: Health changed to #5879
    2017/01/04 03:04:44 [INFO] agent: Synced check ‘service:fabio-vagrant-ubuntu-trusty-9998‘

Fabio 启动会连接本地的 Consul 服务，Fabio 常用地址（示例）：

• http://10.9.10.173:9998/health：服务可以请求到这个地址，用于服务的健康检查（Fabio 统一健康检查）。
• http://10.9.10.173:9999/{servicename}：服务的负载均衡地址，所有的服务调用都会请求到这个 Origin，Fabio 会进行服务分发。
• http://10.9.10.173:9998：Fabio 后台 UI 界面，可以看到服务地址和权重，也可以增加路由规则。

服务注册的时候，需要以 Fabio 的方式进行注册（SDK 进行实现）。

服务的路由需要添加{servicename}（Fabio 识别具体的服务），比如：

[Route("server-test/values")]
public class ValuesController : Controller
{
    public string Get()
    {
        return "hello world";
    }
}

服务调用的时候，请求地址也需要添加{servicename}（Fabio 识别具体的服务），比如：

var service = await _serviceRegistry.GetServiceInstanceAsync("server-test");
var serverUrl = $"{service.Address}:{service.Port}";
if (!serverUrl.StartsWith("http://", StringComparison.OrdinalIgnoreCase))
    serverUrl = "http://" + serverUrl;
var url = $"{serverUrl}/server-test/values";

var httpClient = new HttpClient();
var response = await httpClient.GetAsync(url);

也可以直接在浏览器中输入服务负载均衡地址（测试 Fabio 是否正常），比如：

http://10.9.10.173:9999/server-test/values

200
hello world

Fabio 后台 UI 界面，示例（http://10.9.10.173:9998/routes?filter=）：



Fabio

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原文地址：http://www.cnblogs.com/Leo_wl/p/6254323.html