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config.go
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config.go
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// Copyright 2020, OpenTelemetry Authors
//
// 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:https://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 docker // import "github.com/open-telemetry/opentelemetry-collector-contrib/internal/docker"
import (
"errors"
"fmt"
"time"
)
type Config struct {
// The URL of the docker server. Default is "unix:https:///var/run/docker.sock"
Endpoint string `mapstructure:"endpoint"`
// The maximum amount of time to wait for docker API responses. Default is 5s
Timeout time.Duration `mapstructure:"timeout"`
// A list of filters whose matching images are to be excluded. Supports literals, globs, and regex.
ExcludedImages []string `mapstructure:"excluded_images"`
// Docker client API version.
DockerAPIVersion float64 `mapstructure:"api_version"`
}
// NewConfig creates a new config to be used when creating
// a docker client
func NewConfig(endpoint string, timeout time.Duration, excludedImages []string, apiVersion float64) (*Config, error) {
cfg := &Config{
Endpoint: endpoint,
Timeout: timeout,
ExcludedImages: excludedImages,
DockerAPIVersion: apiVersion,
}
err := cfg.validate()
return cfg, err
}
// NewDefaultConfig creates a new config with default values
// to be used when creating a docker client
func NewDefaultConfig() *Config {
cfg := &Config{
Endpoint: "unix:https:///var/run/docker.sock",
Timeout: 5 * time.Second,
DockerAPIVersion: minimalRequiredDockerAPIVersion,
}
return cfg
}
// validate asserts that an endpoint field is set
// on the config struct
func (config Config) validate() error {
if config.Endpoint == "" {
return errors.New("config.Endpoint must be specified")
}
if config.DockerAPIVersion < minimalRequiredDockerAPIVersion {
return fmt.Errorf("Docker API version must be at least %v", minimalRequiredDockerAPIVersion)
}
return nil
}