/
client.go
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/
client.go
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// Copyright The o11y toolkit Authors
// spdx-license-identifier: apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package client
import (
"fmt"
"os"
"github.com/alecthomas/kingpin/v2"
"github.com/prometheus/client_golang/api"
"github.com/prometheus/common/config"
"gopkg.in/yaml.v2"
)
type Config struct {
url string
file string
}
func InitCliFlags() *Config {
var c Config
kingpin.Flag("prometheus.url", "URL of the Prometheus server.").Default("http://127.0.0.1:9090").StringVar(&c.url)
kingpin.Flag("client.config", "Path to a HTTP client configuration.").StringVar(&c.file)
return &c
}
func NewClient(c *Config) (api.Client, error) {
cfg := config.DefaultHTTPClientConfig
if c.file != "" {
dat, err := os.ReadFile(c.file)
if err != nil {
return nil, fmt.Errorf("error reading client config %s: %w", c.file, err)
}
err = yaml.UnmarshalStrict(dat, &cfg)
if err != nil {
return nil, fmt.Errorf("error unmarshaling client config %s: %w", c.file, err)
}
}
rt, err := config.NewRoundTripperFromConfig(cfg, "oy-toolkit")
if err != nil {
return nil, fmt.Errorf("error creating roundtripper: %w", err)
}
return api.NewClient(api.Config{
Address: c.url,
RoundTripper: rt,
})
}