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feat(alerting): Implement alert-level provider overrides (#929)

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* feat(alerting): Implement alert-level provider overrides

Fixes #96

* Fix tests

* Add missing test cases for alerting providers

* feat(alerting): Implement alert-level overrides on all providers

* chore: Add config.yaml to .gitignore

* fix typo in discord provider

* test: Start fixing tests for alerting providers

* test: Fix GitLab tests

* Fix all tests

* test: Improve coverage

* test: Improve coverage

* Rename override to provider-override

* docs: Mention new provider-override config

* test: Improve coverage

* test: Improve coverage

* chore: Rename Alert.OverrideAsBytes to Alert.ProviderOverrideAsBytes
This commit is contained in:
TwiN
2024-12-16 20:32:13 -05:00
committed by GitHub
parent be9ae6f55d
commit 79c9f24c15
54 changed files with 4623 additions and 2109 deletions
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135
alerting/provider/matrix/matrix.go
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@ -3,6 +3,7 @@ package matrix
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"math/rand"
@ -13,29 +14,18 @@ import (
"github.com/TwiN/gatus/v5/alerting/alert"
"github.com/TwiN/gatus/v5/client"
"github.com/TwiN/gatus/v5/config/endpoint"
"gopkg.in/yaml.v3"
)
// AlertProvider is the configuration necessary for sending an alert using Matrix
type AlertProvider struct {
ProviderConfig `yaml:",inline"`
// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
// Overrides is a list of Override that may be prioritized over the default configuration
Overrides []Override `yaml:"overrides,omitempty"`
}
// Override is a case under which the default integration is overridden
type Override struct {
Group string `yaml:"group"`
ProviderConfig `yaml:",inline"`
}
const defaultServerURL = "https://matrix-client.matrix.org"
type ProviderConfig struct {
var (
ErrAccessTokenNotSet = errors.New("access-token not set")
ErrInternalRoomID = errors.New("internal-room-id not set")
ErrDuplicateGroupOverride = errors.New("duplicate group override")
)
type Config struct {
// ServerURL is the custom homeserver to use (optional)
ServerURL string `yaml:"server-url"`
@ -46,36 +36,78 @@ type ProviderConfig struct {
InternalRoomID string `yaml:"internal-room-id"`
}
// IsValid returns whether the provider's configuration is valid
func (provider *AlertProvider) IsValid() bool {
func (cfg *Config) Validate() error {
if len(cfg.ServerURL) == 0 {
cfg.ServerURL = defaultServerURL
}
if len(cfg.AccessToken) == 0 {
return ErrAccessTokenNotSet
}
if len(cfg.InternalRoomID) == 0 {
return ErrInternalRoomID
}
return nil
}
func (cfg *Config) Merge(override *Config) {
if len(override.ServerURL) > 0 {
cfg.ServerURL = override.ServerURL
}
if len(override.AccessToken) > 0 {
cfg.AccessToken = override.AccessToken
}
if len(override.InternalRoomID) > 0 {
cfg.InternalRoomID = override.InternalRoomID
}
}
// AlertProvider is the configuration necessary for sending an alert using Matrix
type AlertProvider struct {
DefaultConfig Config `yaml:",inline"`
// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
// Overrides is a list of Override that may be prioritized over the default configuration
Overrides []Override `yaml:"overrides,omitempty"`
}
// Override is a case under which the default integration is overridden
type Override struct {
Group string `yaml:"group"`
Config `yaml:",inline"`
}
// Validate the provider's configuration
func (provider *AlertProvider) Validate() error {
registeredGroups := make(map[string]bool)
if provider.Overrides != nil {
for _, override := range provider.Overrides {
if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.AccessToken) == 0 || len(override.InternalRoomID) == 0 {
return false
return ErrDuplicateGroupOverride
}
registeredGroups[override.Group] = true
}
}
return len(provider.AccessToken) > 0 && len(provider.InternalRoomID) > 0
return provider.DefaultConfig.Validate()
}
// Send an alert using the provider
func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
buffer := bytes.NewBuffer(provider.buildRequestBody(ep, alert, result, resolved))
config := provider.getConfigForGroup(ep.Group)
if config.ServerURL == "" {
config.ServerURL = defaultServerURL
cfg, err := provider.GetConfig(ep.Group, alert)
if err != nil {
return err
}
buffer := bytes.NewBuffer(provider.buildRequestBody(ep, alert, result, resolved))
// The Matrix endpoint requires a unique transaction ID for each event sent
txnId := randStringBytes(24)
request, err := http.NewRequest(
http.MethodPut,
fmt.Sprintf("%s/_matrix/client/v3/rooms/%s/send/m.room.message/%s?access_token=%s",
config.ServerURL,
url.PathEscape(config.InternalRoomID),
cfg.ServerURL,
url.PathEscape(cfg.InternalRoomID),
txnId,
url.QueryEscape(config.AccessToken),
url.QueryEscape(cfg.AccessToken),
),
buffer,
)
@ -167,18 +199,6 @@ func buildHTMLMessageBody(ep *endpoint.Endpoint, alert *alert.Alert, result *end
return fmt.Sprintf("<h3>%s</h3>%s%s", message, description, formattedConditionResults)
}
// getConfigForGroup returns the appropriate configuration for a given group
func (provider *AlertProvider) getConfigForGroup(group string) ProviderConfig {
if provider.Overrides != nil {
for _, override := range provider.Overrides {
if group == override.Group {
return override.ProviderConfig
}
}
}
return provider.ProviderConfig
}
func randStringBytes(n int) string {
// All the compatible characters to use in a transaction ID
const availableCharacterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
@ -194,3 +214,34 @@ func randStringBytes(n int) string {
func (provider *AlertProvider) GetDefaultAlert() *alert.Alert {
return provider.DefaultAlert
}
// GetConfig returns the configuration for the provider with the overrides applied
func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
cfg := provider.DefaultConfig
// Handle group overrides
if provider.Overrides != nil {
for _, override := range provider.Overrides {
if group == override.Group {
cfg.Merge(&override.Config)
break
}
}
}
// Handle alert overrides
if len(alert.ProviderOverride) != 0 {
overrideConfig := Config{}
if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
return nil, err
}
cfg.Merge(&overrideConfig)
}
// Validate the configuration
err := cfg.Validate()
return &cfg, err
}
// ValidateOverrides validates the alert's provider override and, if present, the group override
func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
_, err := provider.GetConfig(group, alert)
return err
}