EDGEX FOUNDRY配置参数 --- support-scheduler

王弘和
2023-12-01

support-scheduler是主要是EDGEX系统中的提醒服务,support-scheduler使用介绍如下,他有2个启动参数可以配置:

  • registry是一个bool量,True表示support-scheduler的配置参数是从consul拉取,False表示从本地配置文件载入。
  • profile本地配置文件的路径, 即便registry=True, 该参数也必须要指明一个配置文件,因为连接consul服务所需的host,port等参数必须从本地的配置文件中获取。
Usage: %s [options]
Server Options:
    -r, --registry                  Indicates service should use Registry
    -p, --profile <name>            Indicate configuration profile other than default
Common Options:
    -h, --help                      Show this message

Table of Contents

 

 support-scheduler的配置文件

Writable 

Clients  

Databases

Logging  

Registry 

Service  

Intervals

IntervalActions


support-scheduler的配置文件

[Writable]
ScheduleIntervalTime = 500
LogLevel = 'INFO'

[Service]
BootTimeout = 30000
ClientMonitor = 15000
CheckInterval = '10s'
Host = 'localhost'
Port = 48085
Protocol = 'http'
ReadMaxLimit = 100
StartupMsg = 'This is the Support Scheduler Microservice'
Timeout = 5000

[Registry]
Host = 'localhost'
Port = 8500
Type = 'consul'

[Logging]
EnableRemote = false
File = './logs/edgex-support-scheduler.log'

[Clients]
  [Clients.Logging]
  Protocol = 'http'
  Host = 'localhost'
  Port = 48061

[Databases]
  [Databases.Primary]
  Host = 'localhost'
  Name = 'scheduler'
  Password = ''
  Port = 27017
  Username = ''
  Timeout = 5000
  Type = 'mongodb'

[Intervals]
    [Intervals.Midnight]
    Name = 'midnight'
    Start = '20180101T000000'
    Frequency = 'P1D'

[IntervalActions]
    [IntervalActions.ScrubPushed]
    Name = 'scrub-pushed-events'
    Host = 'localhost'
    Port = 48080
    Protocol = 'http'
    Method = 'DELETE'
    Target = 'core-data'
    Path = '/api/v1/event/scrub'
    Interval = 'midnight'

    [IntervalActions.ScrubAged]
    Name = 'scrub-aged-events'
    Host = 'localhost'
    Port = 48080
    Protocol = 'http'
    Method = 'DELETE'
    Target = 'core-data'
    Path = '/api/v1/event/removeold/age/604800000'
    Interval = 'midnight'

 如上是项目自带的support-scheduler的配置文件 ,主要分8部分,support-scheduler启动后会将配置文件的信息导入如下结构中,若registry=True则根据Registry中的信息连接consul并拉取相应的配置信息覆盖之前从本地配置文件中读取到的信息。

// Configuration V2 for the Support Scheduler Service
type ConfigurationStruct struct {
	Writable        WritableInfo
	Clients         map[string]config.ClientInfo
	Databases       map[string]config.DatabaseInfo
	Logging         config.LoggingInfo
	Registry        config.RegistryInfo
	Service         config.ServiceInfo
	Intervals       map[string]config.IntervalInfo
	IntervalActions map[string]config.IntervalActionInfo
}

 

Writable 

type WritableInfo struct {
	ScheduleIntervalTime    int
	LogLevel                string
}

support-scheduler有2个参数可以在运行时被修改 

ScheduleIntervalTime    内部定时器间隔触发时间,单位:毫秒
LogLevel                日志等级

Clients  

// ClientInfo provides the host and port of another service in the eco-system.
type ClientInfo struct {
	// Host is the hostname or IP address of a service.
	Host string
	// Port defines the port on which to access a given service
	Port int
	// Protocol indicates the protocol to use when accessing a given service
	Protocol string
}
Host 微服务的地址
Port 微服务的端口
Protocol 微服务所使用的协议,目前仅支持http

support-scheduler运行时需要使用其他微服务提供的功能,Client便是连接其他微服务所必须的参数,这是一个map参数,key值便是其他微服务的名字,value便是client的具体参数信息, support-scheduler正常运行一般需要使用logging微服务。

Databases

type DatabaseInfo struct {
	Type     string
	Timeout  int
	Host     string
	Port     int
	Username string
	Password string
	Name     string
}
Type     数据库类型,目前仅支持 mongodb
Timeout  数据库连接超时,单位:s
Host     数据库地址
Port     数据库端口
Username 数据库登录用户名
Password 数据库登录密码
Name     数据库名字

support-scheduler当前支持两种Primary数据库mongodb和redisdb。


Logging  

// LoggingInfo provides basic parameters related to where logs should be written.
type LoggingInfo struct {
	EnableRemote bool
	File         string
}
   EnableRemote True: log于support-logging微服务持久化(support-logging的连接参数由Clients字段提供), False:log于本地文件持久化
   File         log本地持久化时日志文件的路径


Registry 

// RegistryInfo defines the type and location (via host/port) of the desired service registry (e.g. Consul, Eureka)
type RegistryInfo struct {
	Host string
	Port int
	Type string
}

consul连接参数 


Service  

同support-logging

Intervals

type IntervalInfo struct {
	// Name of the schedule must be unique?
	Name string
	// Start time in ISO 8601 format YYYYMMDD'T'HHmmss
	Start string
	// End time in ISO 8601 format YYYYMMDD'T'HHmmss
	End string
	// Periodicity of the schedule
	Frequency string
	// Cron style regular expression indicating how often the action under schedule should occur.  Use either runOnce, frequency or cron and not all.
	Cron string
	// Boolean indicating that this schedules runs one time - at the time indicated by the start
	RunOnce bool
}

 

Interval是触发的描述结构,support-scheduler会周期性的检查Interval数组并将满足触发条件的Interval过滤出来,执行下挂在其下的所有触发动作。Interval的来源主要有三处:
1,support-scheduler使用的数据库,support-scheduler启动时会从数据库load已经存在的Interval
2,配置文件,support-scheduler会载入配置文件中的Interval并将其写入数据库持久化,值得注意的是support-scheduler不支持重名的    Interval,因此当配置文件的Interval的Name与数据库中的相应Interval的Name相同时会优先使用数据库中的Interval而放弃配置文件中的Interval
3,support-scheduler提供的restful API接口支持动态更新Interval信息

Name 触发 名字
Start 触发开始时间 ISO 8601 format YYYYMMDD'T'HHmmss
End 触发结束时间 ISO 8601 format YYYYMMDD'T'HHmmss
Frequency 周期性触发时的触发频率
Cron Cron 风格的触发表达式
RunOnce 是否仅仅触发一次

IntervalActions

type IntervalActionInfo struct {
	// Host is the hostname or IP address of a service.
	Host string
	// Port defines the port on which to access a given service
	Port int
	// Protocol indicates the protocol to use when accessing a given service
	Protocol string
	// Action name
	Name string
	// Action http method *const prob*
	Method string
	// Acton target name
	Target string
	// Action target parameters
	Parameters string
	// Action target API path
	Path string
	// Associated Schedule for the Event
	Interval string
}

 

 触发动作的执行最终都表现为访问一个外部服务(外部指的是support-scheduler微服务的外部),可以是core-data等其他微服务,也可以是其他接口兼容的服务。

Host 外部服务主机名
Port 外部服务端口
Protocol 外部服务协议,目前仅支持http
Name 触发动作的名字
Method http方法,GET,POST等等
Target 外部服务的名字
Parameters http参数,目前源码不支持该字段
Path 外部服务path 如/api/v1/event/removeold/age/604800000
Interval 绑定的Interval名字,非常关键,如果该字段在support-scheduler中没有对应的Interval也就意味着该触发动作永远不会被执行
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