136 lines
3.4 KiB
Go
136 lines
3.4 KiB
Go
// Copyright 2015 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package config
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import (
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"errors"
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"io/ioutil"
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"os"
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"time"
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"github.com/fernet/fernet-go"
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"gopkg.in/yaml.v2"
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)
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// ErrDatasourceNotLoaded is returned when the datasource variable in the configuration file is not loaded properly
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var ErrDatasourceNotLoaded = errors.New("could not load configuration: no database source specified")
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// RegistrableComponentConfig is a configuration block that can be used to
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// determine which registrable component should be initialized and pass
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// custom configuration to it.
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type RegistrableComponentConfig struct {
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Type string
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Options map[string]interface{}
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}
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// File represents a YAML configuration file that namespaces all Clair
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// configuration under the top-level "clair" key.
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type File struct {
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Clair Config `yaml:"clair"`
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}
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// Config is the global configuration for an instance of Clair.
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type Config struct {
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Database RegistrableComponentConfig
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Updater *UpdaterConfig
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Notifier *NotifierConfig
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API *APIConfig
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}
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// UpdaterConfig is the configuration for the Updater service.
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type UpdaterConfig struct {
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Interval time.Duration
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}
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// NotifierConfig is the configuration for the Notifier service and its registered notifiers.
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type NotifierConfig struct {
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Attempts int
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RenotifyInterval time.Duration
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Params map[string]interface{} `yaml:",inline"`
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}
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// APIConfig is the configuration for the API service.
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type APIConfig struct {
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Port int
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HealthPort int
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Timeout time.Duration
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PaginationKey string
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CertFile, KeyFile, CAFile string
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}
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// DefaultConfig is a configuration that can be used as a fallback value.
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func DefaultConfig() Config {
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return Config{
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Database: RegistrableComponentConfig{
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Type: "pgsql",
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},
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Updater: &UpdaterConfig{
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Interval: 1 * time.Hour,
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},
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API: &APIConfig{
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Port: 6060,
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HealthPort: 6061,
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Timeout: 900 * time.Second,
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},
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Notifier: &NotifierConfig{
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Attempts: 5,
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RenotifyInterval: 2 * time.Hour,
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},
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}
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}
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// Load is a shortcut to open a file, read it, and generate a Config.
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// It supports relative and absolute paths. Given "", it returns DefaultConfig.
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func Load(path string) (config *Config, err error) {
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var cfgFile File
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cfgFile.Clair = DefaultConfig()
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if path == "" {
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return &cfgFile.Clair, nil
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}
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f, err := os.Open(os.ExpandEnv(path))
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if err != nil {
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return
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}
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defer f.Close()
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d, err := ioutil.ReadAll(f)
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if err != nil {
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return
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}
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err = yaml.Unmarshal(d, &cfgFile)
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if err != nil {
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return
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}
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config = &cfgFile.Clair
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// Generate a pagination key if none is provided.
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if config.API.PaginationKey == "" {
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var key fernet.Key
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if err = key.Generate(); err != nil {
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return
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}
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config.API.PaginationKey = key.Encode()
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} else {
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_, err = fernet.DecodeKey(config.API.PaginationKey)
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if err != nil {
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return
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}
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}
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return
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}
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