firehol/netdata

// SPDX-License-Identifier: GPL-3.0-or-later

package consul

import (
    "github.com/blang/semver/v4"
)

const (
    // https://developer.hashicorp.com/consul/api-docs/agent#read-configuration
    urlPathAgentSelf = "/v1/agent/self"
)

type consulConfig struct {
    Config struct {
        Datacenter        string
        PrimaryDatacenter string
        NodeName          string
        NodeID            string
        Server            bool
        Version           string
    }
    DebugConfig struct {
        Telemetry struct {
            MetricsPrefix   string
            DisableHostname bool
            PrometheusOpts  struct {
                Expiration string
                Name       string
            }
        }
        Cloud struct {
            AuthURL      string
            ClientID     string
            ClientSecret string
            Hostname     string
            ResourceID   string
            ScadaAddress string
        }
    }
    Stats struct {
        License struct {
            ID string `json:"id"`
        } `json:"license"`
    }
}

func (c *Consul) collectConfiguration() error {
    req, err := c.createRequest(urlPathAgentSelf)
    if err != nil {
        return err
    }

    var cfg consulConfig

    if err := c.client().RequestJSON(req, &cfg); err != nil {
        return err
    }

    c.cfg = &cfg
    c.Debugf("consul config: %+v", cfg)

    if !c.isTelemetryPrometheusEnabled() {
        c.Warning("export of Prometheus metrics is disabled")
    }

    ver, err := semver.New(c.cfg.Config.Version)
    if err != nil {
        c.Warningf("error on parsing Consul version '%s': %v", c.cfg.Config.Version, err)
        return nil
    }

    c.version = ver

    return nil
}