opcua_client

README

OPC UA Client Input Plugin

The opcua plugin retrieves data from OPC UA client devices.

Telegraf minimum version: Telegraf 1.16 Plugin minimum tested version: 1.16

Configuration

[[inputs.opcua]]
  ## Metric name
  # name = "opcua"
  #
  ## OPC UA Endpoint URL
  # endpoint = "opc.tcp://localhost:4840"
  #
  ## Maximum time allowed to establish a connect to the endpoint.
  # connect_timeout = "10s"
  #
  ## Maximum time allowed for a request over the estabilished connection.
  # request_timeout = "5s"
  #
  ## Security policy, one of "None", "Basic128Rsa15", "Basic256",
  ## "Basic256Sha256", or "auto"
  # security_policy = "auto"
  #
  ## Security mode, one of "None", "Sign", "SignAndEncrypt", or "auto"
  # security_mode = "auto"
  #
  ## Path to cert.pem. Required when security mode or policy isn't "None".
  ## If cert path is not supplied, self-signed cert and key will be generated.
  # certificate = "/etc/telegraf/cert.pem"
  #
  ## Path to private key.pem. Required when security mode or policy isn't "None".
  ## If key path is not supplied, self-signed cert and key will be generated.
  # private_key = "/etc/telegraf/key.pem"
  #
  ## Authentication Method, one of "Certificate", "UserName", or "Anonymous".  To
  ## authenticate using a specific ID, select 'Certificate' or 'UserName'
  # auth_method = "Anonymous"
  #
  ## Username. Required for auth_method = "UserName"
  # username = ""
  #
  ## Password. Required for auth_method = "UserName"
  # password = ""
  #
  ## Option to select the metric timestamp to use. Valid options are:
  ##     "gather" -- uses the time of receiving the data in telegraf
  ##     "server" -- uses the timestamp provided by the server
  ##     "source" -- uses the timestamp provided by the source
  # timestamp = "gather"
  #
  ## Node ID configuration
  ## name              - field name to use in the output
  ## namespace         - OPC UA namespace of the node (integer value 0 thru 3)
  ## identifier_type   - OPC UA ID type (s=string, i=numeric, g=guid, b=opaque)
  ## identifier        - OPC UA ID (tag as shown in opcua browser)
  ## tags              - extra tags to be added to the output metric (optional)
  ## Example:
  ## {name="ProductUri", namespace="0", identifier_type="i", identifier="2262", tags=[["tag1","value1"],["tag2","value2]]}
  # nodes = [
  #  {name="", namespace="", identifier_type="", identifier=""},
  #  {name="", namespace="", identifier_type="", identifier=""},
  #]
  #
  ## Node Group
  ## Sets defaults for OPC UA namespace and ID type so they aren't required in
  ## every node.  A group can also have a metric name that overrides the main
  ## plugin metric name.
  ##
  ## Multiple node groups are allowed
  #[[inputs.opcua.group]]
  ## Group Metric name. Overrides the top level name.  If unset, the
  ## top level name is used.
  # name =
  #
  ## Group default namespace. If a node in the group doesn't set its
  ## namespace, this is used.
  # namespace =
  #
  ## Group default identifier type. If a node in the group doesn't set its
  ## namespace, this is used.
  # identifier_type =
  #
  ## Node ID Configuration.  Array of nodes with the same settings as above.
  # nodes = [
  #  {name="", namespace="", identifier_type="", identifier=""},
  #  {name="", namespace="", identifier_type="", identifier=""},
  #]

Node Configuration

An OPC UA node ID may resemble: "n=3;s=Temperature". In this example:

• n=3 is indicating the namespace is 3
• s=Temperature is indicting that the identifier_type is a string and identifier value is 'Temperature'
• This example temperature node has a value of 79.0 To gather data from this node enter the following line into the 'nodes' property above:

{field_name="temp", namespace="3", identifier_type="s", identifier="Temperature"},

This node configuration produces a metric like this:

opcua,id=n\=3;s\=Temperature temp=79.0,quality="OK (0x0)" 1597820490000000000

Group Configuration

Groups can set default values for the namespace, identifier type, and tags settings. The default values apply to all the nodes in the group. If a default is set, a node may omit the setting altogether. This simplifies node configuration, especially when many nodes share the same namespace or identifier type.

The output metric will include tags set in the group and the node. If a tag with the same name is set in both places, the tag value from the node is used.

This example group configuration has two groups with two nodes each:

  [[inputs.opcua.group]]
  name="group1_metric_name"
  namespace="3"
  identifier_type="i"
  tags=[["group1_tag", "val1"]]
  nodes = [
    {name="name", identifier="1001", tags=[["node1_tag", "val2"]]},
    {name="name", identifier="1002", tags=[["node1_tag", "val3"]]},
  ]
  [[inputs.opcua.group]]
  name="group2_metric_name"
  namespace="3"
  identifier_type="i"
  tags=[["group2_tag", "val3"]]
  nodes = [
    {name="saw", identifier="1003", tags=[["node2_tag", "val4"]]},
    {name="sin", identifier="1004"},
  ]

It produces metrics like these:

group1_metric_name,group1_tag=val1,id=ns\=3;i\=1001,node1_tag=val2 name=0,Quality="OK (0x0)" 1606893246000000000
group1_metric_name,group1_tag=val1,id=ns\=3;i\=1002,node1_tag=val3 name=-1.389117,Quality="OK (0x0)" 1606893246000000000
group2_metric_name,group2_tag=val3,id=ns\=3;i\=1003,node2_tag=val4 Quality="OK (0x0)",saw=-1.6 1606893246000000000
group2_metric_name,group2_tag=val3,id=ns\=3;i\=1004 sin=1.902113,Quality="OK (0x0)" 1606893246000000000

Documentation

Index

• func BuildNodeID(tag NodeSettings) string
• func Connect(o *OpcUA) error
• type ConnectionState
• type GroupSettings
• type Node
• type NodeSettings
• type OPCData
• type OpcUA
  • func (o *OpcUA) Description() string
  • func (o *OpcUA) Gather(acc telegraf.Accumulator) error
  • func (o *OpcUA) Init() error
  • func (o *OpcUA) InitNodes() error
  • func (o *OpcUA) SampleConfig() string

Functions

func BuildNodeID

func BuildNodeID(tag NodeSettings) string

BuildNodeID build node ID from OPC tag

func Connect

func Connect(o *OpcUA) error

Connect to a OPCUA device

Types

type ConnectionState

type ConnectionState int

ConnectionState used for constants

const (
	//Disconnected constant state 0
	Disconnected ConnectionState = iota
	//Connecting constant state 1
	Connecting
	//Connected constant state 2
	Connected
)

type GroupSettings

type GroupSettings struct {
	MetricName     string         `toml:"name"`            // Overrides plugin's setting
	Namespace      string         `toml:"namespace"`       // Can be overridden by node setting
	IdentifierType string         `toml:"identifier_type"` // Can be overridden by node setting
	Nodes          []NodeSettings `toml:"nodes"`
	TagsSlice      [][]string     `toml:"tags"`
}

type Node

type Node struct {
	// contains filtered or unexported fields
}

type NodeSettings

type NodeSettings struct {
	FieldName      string     `toml:"name"`
	Namespace      string     `toml:"namespace"`
	IdentifierType string     `toml:"identifier_type"`
	Identifier     string     `toml:"identifier"`
	DataType       string     `toml:"data_type"`   // Kept for backward compatibility but was never used.
	Description    string     `toml:"description"` // Kept for backward compatibility but was never used.
	TagsSlice      [][]string `toml:"tags"`
}

type OPCData

type OPCData struct {
	TagName    string
	Value      interface{}
	Quality    ua.StatusCode
	ServerTime time.Time
	SourceTime time.Time
	DataType   ua.TypeID
}

OPCData type

type OpcUA

type OpcUA struct {
	MetricName     string          `toml:"name"`
	Endpoint       string          `toml:"endpoint"`
	SecurityPolicy string          `toml:"security_policy"`
	SecurityMode   string          `toml:"security_mode"`
	Certificate    string          `toml:"certificate"`
	PrivateKey     string          `toml:"private_key"`
	Username       string          `toml:"username"`
	Password       string          `toml:"password"`
	Timestamp      string          `toml:"timestamp"`
	AuthMethod     string          `toml:"auth_method"`
	ConnectTimeout config.Duration `toml:"connect_timeout"`
	RequestTimeout config.Duration `toml:"request_timeout"`
	RootNodes      []NodeSettings  `toml:"nodes"`
	Groups         []GroupSettings `toml:"group"`
	Log            telegraf.Logger `toml:"-"`

	// status
	ReadSuccess selfstat.Stat `toml:"-"`
	ReadError   selfstat.Stat `toml:"-"`
	// contains filtered or unexported fields
}

OpcUA type

func (*OpcUA) Description

func (o *OpcUA) Description() string

Description will appear directly above the plugin definition in the config file

func (*OpcUA) Gather

func (o *OpcUA) Gather(acc telegraf.Accumulator) error

Gather defines what data the plugin will gather.

func (*OpcUA) Init

func (o *OpcUA) Init() error

Init will initialize all tags

func (*OpcUA) InitNodes

func (o *OpcUA) InitNodes() error

InitNodes Method on OpcUA

func (*OpcUA) SampleConfig

func (o *OpcUA) SampleConfig() string

SampleConfig will populate the sample configuration portion of the plugin's configuration