Documentation Grafana Alloy Reference Components discovery discovery.nerve

discovery.nerve

discovery.nerve discovers airbnb/nerve targets stored in Zookeeper.

Usage

alloy Copy

discovery.nerve "<LABEL>" {
    servers = ["<SERVER_1>", "<SERVER_2>"]
    paths   = ["<PATH_1>", "<PATH_2>"]
}

Arguments

You can use the following arguments with discovery.nerve:

Each element in the path list can either point to a single service, or to the root of a tree of services.

Blocks

The discovery.nerve component doesn’t support any blocks. You can configure this component with arguments.

Exported fields

The following fields are exported and can be referenced by other components:

The following meta labels are available on targets and can be used by the discovery.relabel component

• __meta_nerve_endpoint_host: The host of the endpoint.
• __meta_nerve_endpoint_name: The name of the endpoint.
• __meta_nerve_endpoint_port: The port of the endpoint.
• __meta_nerve_path: The full path to the endpoint node in Zookeeper.

Component health

discovery.nerve is only reported as unhealthy when given an invalid configuration. In those cases, exported fields retain their last healthy values.

Debug information

discovery.nerve doesn’t expose any component-specific debug information.

Debug metrics

discovery.nerve doesn’t expose any component-specific debug metrics.

Example

alloy Copy

discovery.nerve "example" {
    servers = ["localhost"]
    paths   = ["/monitoring"]
    timeout = "1m"
}
prometheus.scrape "demo" {
    targets    = discovery.nerve.example.targets
    forward_to = [prometheus.remote_write.demo.receiver]
}
prometheus.remote_write "demo" {
    endpoint {
        url = "<PROMETHEUS_REMOTE_WRITE_URL>"
        basic_auth {
            username = "<USERNAME>"
            password = "<PASSWORD>"
        }
    }
}

Replace the following:

• <PROMETHEUS_REMOTE_WRITE_URL>: The URL of the Prometheus remote_write-compatible server to send metrics to.
• <USERNAME>: The username to use for authentication to the remote_write API.
• <PASSWORD>: The password to use for authentication to the remote_write API.

Compatible components

discovery.nerve has exports that can be consumed by the following components:

• Components that consume Targets