# 9.1 运行和部署
Juno Agent管理了节点信息、注册信息、配置信息、探活信息、消息总线等功能。
# 9.1.1 部署Agent模式
我们有两种运行Juno-Agent的模式:Client模式和Server模式。
- Client模式：该模式需要我们将Agent部署到每个应用的节点上，这样我们的Juno-Agent，可以获取更多应用的信息，例如机器上的启动信息，还可以执行HShell指令，帮助我们排查线上问题。
- Server模式：该模式需要我们将多个Agent组成一个Server进行部署，虽然这种模式，有部分组件功能无法启用，但是这种模式下，我们可以更方便的部署我们的Agent，减少我们的运维成本。
# 9.1.2 运行一个Agent
Juno-Agent可以通过命令行启动。当Juno-Agent运行后，你可以看到以下输出
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Welcome to jupiter, starting jupiter ...
1590412508 INFO load local file {"mod": "config", "addr": "./config/config-live.toml"}
1590412508 INFO auto max procs {"mod": "proc", "procs": 4}
1590412508 INFO plugin {"reportAgentStatus": "start"}
1590412508 INFO plugin {"process": "start"}
1590412508 INFO plugin {"appConf.etcd": "start"}
1590412508 INFO dial etcd server {"mod": "client.etcd", "addr": ["wsd-projecta-etcd-cc.pre.unp.oyw:2379"]}
1590412508 ERROR init get update error {"plugin": "confProxy", "msg": "key check: port empty", "hostKey": "/Juno-agent/ubuntu", "err": "key check: port empty"}
1590412508 ERROR init get update error {"plugin": "confProxy", "msg": "open /home/www/server: is a directory", "hostKey": "/Juno-agent/ubuntu", "err": "open /home/www/server: is a directory"}
1590412508 INFO dial etcd server {"mod": "client.etcd", "addr": ["wsd-projecta-etcd-rd.pre.unp.oyw:2379"]}
1590412508 INFO plugin {"supervisorScanner": "start"}
1590412508 ERROR fsnotify add dir err {"msg": "no such file or directory"}
1590412508 INFO plugin {"systemdScanner": "start"}
1590412508 ERROR SystemdScanner add dir err {"err": "no such file or directory"}
1590412508 INFO plugin {"healCheck": "start"}
1590412508 INFO start governor {"mod": "app", "addr": "http://127.0.0.1:9099"}
1590412508 INFO start servers {"mod": "app", "addr": "http://0.0.0.0:50000"}
1590412508 INFO start servers {"mod": "app", "addr": "grpc://0.0.0.0:50001"}
1590412508 INFO echo add route {"mod": "server.echo", "method": "POST", "path": "/api/v1/conf/command_line/status"}
1590412508 INFO echo add route {"mod": "server.echo", "method": "GET", "path": "/api/v1/agent/config"}
1590412508 INFO echo add route {"mod": "server.echo", "method": "GET", "path": "/api/agent/reload"}
1590412508 INFO echo add route {"mod": "server.echo", "method": "GET", "path": "/api/agent/process/status"}
1590412508 INFO echo add route {"mod": "server.echo", "method": "GET", "path": "/api/process/status"}
1590412508 INFO echo add route {"mod": "server.echo", "method": "POST", "path": "/api/agent/process/shell"}
1590412508 INFO echo add route {"mod": "server.echo", "method": "GET", "path": "/api/v1/agent/:target"}
⇨ http server started on [::]:50000
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以下为输出的描述：
- Info: 输出Agent的基本信息。
- Plugin: 输出Agent启动的组件
- Server: 输出Agent提供的服务