Component Types template

Component types are defined using a YAML manifest with the following structure:

# General section
name: function_branin
description: A component type for the branin analytical function

# Parameters section
parameters:
  - name: x1
    domain:
      type: real
      domain: [-5.0, 10.0]
    defaultValue: -5.0
    decimals: 3
    operators:
    FileConfigurator:
      confTemplate: "${value}"

  - name: x2
    domain:
      type: real
      domain: [0.0, 15.0]
    defaultValue: 0.0

  - name: x3
    domain:
      type: categorical
      categories: [cat1,cat2,cat3]
    operators:
    LinuxConfigurator:
      echo:
        file: /sys/class/block/nvme0n1/queue/scheduler

# Metrics section
metrics:
  - name: function_value

and properties for the general section:

Field Type Value restrictions Is required Default value Description

Field	Type	Value restrictions	Is required	Description
`name`	string	should match the following regexp: `^[a-zA-Z][a-zA-Z0-9_]*$` that is only letters, number and underscores, no initial number of underscore Notice: this should not match the name of another component	Yes	The name of the component.
`description`	string		Yes	A description to characterize the component.
`componentType`	string	notice: this should match the name of an existing component-type	Yes	The name of the component-type that defines the type of the component.
`properties`	object		No	General custom properties of the component. These properties can be defined freely and usually have the purpose to expose information useful for configuring the component.

name

string

should match the following regexp:

^[a-zA-Z][a-zA-Z0-9_]*$

that is only letters, number and underscores, no initial number of underscore

Notice: this should not match the name of another component

Yes

The name of the component.

description

string

Yes

A description to characterize the component.

componentType

string

notice: this should match the name of an existing component-type

Yes

The name of the component-type that defines the type of the component.

properties

object

General custom properties of the component. These properties can be defined freely and usually have the purpose to expose information useful for configuring the component.

The parameter section describes the relationship between the component type and already defined parameters with the following properties:

Field Type Value restrictions Is required Default value Description

Field	Type	Value restrictions	Is required	Default value	Description
`name`	string	It should match the name of an existing parameter.	Yes	-	The name of the parameter that should be related to the component-type
`domain->type`	string	{real, integer, categorical}	Yes	-	The type of domain to be set for the parameter in relationship with the component-type
`domain->domain`	array of numbers	The numbers should be either all integers or real numbers(do not omit the " . ") depending on `domain->type`. The size of the array must be 2.	No	-	The bounds to be used to define the domain of the parameter. These bounds are inclusive
`domain->categories`	array of strings		No	-	The possible categories that the parameter could possess
`defaultValue`	string, integer, real	The value must be included in the domain, for real and integer types and must be a value included in the categories	Yes	-	The default value of the parameter
`decimals`	integer	[0-255]	No	5	The number of decimal digits rendered for this parameter
`operators`	object	The name and the parameters of a supported workflow operators	Yes	-	Specify what operators can be used to apply the parameter

name

string

It should match the name of an existing parameter.

Yes

The name of the parameter that should be related to the component-type

domain->type

string

{real, integer, categorical}

Yes

The type of domain to be set for the parameter in relationship with the component-type

domain->domain

array of numbers

The numbers should be either all integers or real numbers(do not omit the " . ") depending on domain->type.

The size of the array must be 2.

The bounds to be used to define the domain of the parameter. These bounds are inclusive

domain->categories

array of strings

The possible categories that the parameter could possess

defaultValue

string, integer, real

The value must be included in the domain, for real and integer types and must be a value included in the categories

Yes

The default value of the parameter

decimals

integer

[0-255]

The number of decimal digits rendered for this parameter

operators

object

The name and the parameters of a supported workflow operators

Yes

Specify what operators can be used to apply the parameter

The metric section describes the relationship between the component type and already defined metrics with the following properties:

Field	Type	Value restrictions	Is required	Default value	Description
name	string	It should match the name of an existing metric	Yes		The name of the metric that should be related to the component type

Field

Type

Value restrictions

Is required

Default value

Description

name

string

It should match the name of an existing metric

Yes

The name of the metric that should be related to the component type

Notice that component type definitions are shared across all the workspaces on the same Akamas installation, and require an account with administrative privileges to manage them.

Examples

Example of a component for the Cassandra component type:

name: Cassandra
description: The Cassandra NoSQL database version 3
parameters:
  - name: cassandra_compactionStrategy
    domain:
      type: categorical
      categories: [A, B]
    defaultValue: A

metrics:
  - name: total_rate
  - name: read_rate
  - name: write_rate
  - name: read_response_time_avg
  - name: read_response_time_p90
  - name: read_response_time_p99
  - name: read_response_time_max
  - name: write_response_time_avg
  - name: write_response_time_p90
  - name: write_response_time_p99
  - name: write_response_time_max

Example of a component for the Linux operating component type:

name: Linux OS
description: A component type for the Linux Operating System
parameters:
  #CPU Related
  - name: os_cpuSchedMinGranularity
    domain:
      type: integer
      domain: [300000, 30000000]
    defaultValue: 3000000
  - name: os_cpuSchedWakeupGranularity
    domain:
      type: integer
      domain: [400000, 40000000]
    defaultValue: 4000000
  - name: osCpu.schedMigrationCost
    domain:
      type: integer
      domain: [100000, 5000000]
    defaultValue: 500000
  - name: os_CPUSchedChildRunsFirst
    domain:
      type: integer
      domain: [0, 1]
    defaultValue: 0
  - name: os_CPUSchedLatency
    domain:
      type: integer
      domain: [2400000, 240000000]
    defaultValue: 24000000
  - name: os_CPUSchedAutogroupEnabled
    domain:
      type: integer
      domain: [0, 1]
    defaultValue: 1
  - name: os_CPUSchedNrMigrate
    domain:
      type: integer
      domain: [3, 320]
    defaultValue: 32
  #Memory Related
  - name: os_MemorySwappiness
    domain:
      type: integer
      domain: [0, 100]
    defaultValue: 60
  - name: os_MemoryVmVfsCachePressure
    domain:
      type: integer
      domain: [10, 100]
    defaultValue: 100
  - name: os_MemoryVmMinFree
    domain:
      type: integer
      domain: [10240, 1024000]
    defaultValue: 67584
  - name: os_MemoryVmDirtyRatio
    domain:
      type: integer
      domain: [1, 99]
    defaultValue: 10
  - name: os_MemoryTransparentHugepageEnabled
    domain:
      type: categorical
      categories: ['True', 'False']
    defaultValue: 'True'
  - name: os_MemoryTransparentHugepageDefrag
    domain:
      type: categorical
      categories: ['True', 'False']
    defaultValue: 'True'
  - name: os_MemorySwap
    domain:
      type: categorical
      categories: ['True', 'False']
    defaultValue: 'True'
  - name: os_MemoryVmDirtyExpire
    domain:
      type: integer
      domain: [300, 30000]
    defaultValue: 3000
  - name: os_MemoryVmDirtyWriteback
    domain:
      type: integer
      domain: [50, 5000]
    defaultValue: 500

metrics:
  - name: cpu_num
  - name: cpu_util
  - name: mem_util
  - name: load_avg
  - name: swapins
  - name: swapouts
  - name: disk_iops_writes
  - name: disk_iops_reads
  - name: disk_iops_total
  - name: disk_await_worst
  - name: proc_blocked
  - name: context_switch
  - name: tcp_retrans
  - name: tcp_tozerowin
  - name: net_band_rx_bits
  - name: net_band_tx_bits
  - name: network_in_byte_rate
  - name: network_out_byte_rate
  - name: mem_fault_minor
  - name: mem_fault_major
  - name: mem_active_file
  - name: mem_active_anon
  - name: mem_inactive_file
  - name: mem_inactive_anon

Last updated 8 months ago