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manager_config.go
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manager_config.go
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package rulesclient
import (
"crypto/tls"
"crypto/x509"
"encoding/json"
"fmt"
"io"
"github.com/google/uuid"
prom_config "github.com/prometheus/prometheus/config"
"gopkg.in/yaml.v2"
yamlj "sigs.k8s.io/yaml"
)
type managerData struct {
Data manager `json:"data"`
}
type manager struct {
Id string `json:"id"`
Alertmanagers json.RawMessage
}
type ManagerConfig struct {
id string
alertmanagers *prom_config.AlertmanagerConfigs
}
func NewManagerConfig(id string, alertmanagers *prom_config.AlertmanagerConfigs) *ManagerConfig {
return &ManagerConfig{
id: id,
alertmanagers: alertmanagers,
}
}
func (m *ManagerConfig) Id() string {
return m.id
}
func (m *ManagerConfig) GenerateId() {
m.id = uuid.New().String()
}
func (m *ManagerConfig) AlertManagers() *prom_config.AlertmanagerConfigs {
return m.alertmanagers
}
func (m *ManagerConfig) Validate() error {
for _, alertmanager := range m.alertmanagers.ToMap() {
err := validateCACert(alertmanager.HTTPClientConfig.TLSConfig.CAFile)
if err != nil {
return err
}
err = validateCertAndKey(
alertmanager.HTTPClientConfig.TLSConfig.CertFile,
alertmanager.HTTPClientConfig.TLSConfig.KeyFile,
)
if err != nil {
return err
}
}
return nil
}
func validateCACert(caCert string) error {
if CertificateRegexp.MatchString(caCert) {
caCertPool := x509.NewCertPool()
if !caCertPool.AppendCertsFromPEM([]byte(caCert)) {
return fmt.Errorf("unable to use specified CA cert %s", caCert)
}
}
return nil
}
func validateCertAndKey(cert, key string) error {
if CertificateRegexp.MatchString(cert) || CertificateRegexp.MatchString(key) {
_, err := tls.X509KeyPair([]byte(cert), []byte(key))
return err
}
return nil
}
func (m *ManagerConfig) ToJSON() ([]byte, error) {
y, err := yaml.Marshal(m.AlertManagers())
if err != nil {
return nil, err
}
j, err := yamlj.YAMLToJSON(y)
if err != nil {
return nil, err
}
manager := manager{
Id: m.id,
Alertmanagers: j,
}
data := managerData{
Data: manager,
}
payload, err := json.Marshal(data)
if err != nil {
return nil, err
}
return payload, nil
}
func ManagerConfigFromJSON(body io.ReadCloser) (*ManagerConfig, error) {
managerData := managerData{}
err := json.NewDecoder(body).Decode(&managerData)
if err != nil {
return nil, err
}
var alertManagers prom_config.AlertmanagerConfigs
if managerData.Data.Alertmanagers != nil {
y, err := yamlj.JSONToYAML([]byte(string(managerData.Data.Alertmanagers)))
if err != nil {
return nil, err
}
err = yaml.Unmarshal(y, &alertManagers)
if err != nil {
return nil, err
}
}
managerConfig := &ManagerConfig{
id: managerData.Data.Id,
alertmanagers: &alertManagers,
}
return managerConfig, nil
}