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config.go
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config.go
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// Copyright 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://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 smartagentextension
import (
"fmt"
"path/filepath"
"github.com/signalfx/defaults"
saconfig "github.com/signalfx/signalfx-agent/pkg/core/config"
"go.opentelemetry.io/collector/config"
"gopkg.in/yaml.v2"
)
var _ config.Unmarshallable = (*Config)(nil)
type Config struct {
config.ExtensionSettings `mapstructure:",squash"`
// Agent uses yaml, which mapstructure doesn't support.
// Custom unmarshaller required for yaml and SFx defaults usage.
saconfig.Config `mapstructure:"-,squash"`
}
func (cfg *Config) Unmarshal(componentParser *config.Map) error {
allSettings := componentParser.ToStringMap()
configDirSet := false
if collectd, ok := allSettings["collectd"]; ok {
if collectdBlock, ok := collectd.(map[string]interface{}); ok {
if _, ok := collectdBlock["configDir"]; ok {
configDirSet = true
}
}
}
config, err := smartAgentConfigFromSettingsMap(allSettings)
if err != nil {
return err
}
if config.BundleDir == "" {
config.BundleDir = cfg.Config.BundleDir
}
config.Collectd.BundleDir = config.BundleDir
if !configDirSet {
config.Collectd.ConfigDir = filepath.Join(config.Collectd.BundleDir, "run", "collectd")
}
cfg.Config = *config
return nil
}
func smartAgentConfigFromSettingsMap(settings map[string]interface{}) (*saconfig.Config, error) {
var config saconfig.Config
var collectdSettings map[string]interface{}
var ok bool
if collectdSettings, ok = settings["collectd"].(map[string]interface{}); !ok {
collectdSettings = map[string]interface{}{}
}
settings["collectd"] = collectdSettings
asBytes, err := yaml.Marshal(settings)
if err != nil {
return nil, fmt.Errorf("failed constructing raw Smart Agent config: %w", err)
}
err = yaml.UnmarshalStrict(asBytes, &config)
if err != nil {
return nil, fmt.Errorf("failed creating Smart Agent config: %w", err)
}
err = defaults.Set(&config)
if err != nil {
return nil, fmt.Errorf("failed setting config defaults: %w", err)
}
// The default on CollectdConfig is 0, use the default if this is the case.
if config.Collectd.IntervalSeconds == 0 {
config.Collectd.IntervalSeconds = defaultIntervalSeconds
}
config.Collectd.BundleDir = config.BundleDir
return &config, nil
}