ruler

package
v2.0.0 Latest Latest
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 Go to latest Published: Jun 14, 2023 License: AGPL-3.0 Imports: 69 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	AlertForStateMetricName = "ALERTS_FOR_STATE"
)
View Source 
const EvalModeLocal = "local"
View Source 
const (
	EvalModeRemote = "remote"
)
View Source 
const MetricsPrefix = "loki_ruler_wal_"

MetricsPrefix defines the prefix to use for all metrics in this package

Variables

This section is empty.

Functions

func DialQueryFrontend 

func DialQueryFrontend(cfg *QueryFrontendConfig) (httpgrpc.HTTPClient, error)

DialQueryFrontend creates and initializes a new httpgrpc.HTTPClient taking a QueryFrontendConfig configuration.

func ForStateMetric 

func ForStateMetric(base labels.Labels, alertName string) labels.Labels

func MultiTenantManagerAdapter 

func MultiTenantManagerAdapter(mgr ruler.MultiTenantManager) ruler.MultiTenantManager

MultiTenantManagerAdapter will wrap a MultiTenantManager which validates loki rules

func MultiTenantRuleManager 

func MultiTenantRuleManager(cfg Config, evaluator Evaluator, overrides RulesLimits, logger log.Logger, reg prometheus.Registerer) ruler.ManagerFactory

func NewRuler 

func NewRuler(cfg Config, evaluator Evaluator, reg prometheus.Registerer, logger log.Logger, ruleStore rulestore.RuleStore, limits RulesLimits) (*ruler.Ruler, error)

func ValidateGroups 

func ValidateGroups(grps ...rulefmt.RuleGroup) (errs []error)

Types

type CachingGroupLoader 

type CachingGroupLoader struct {
	// contains filtered or unexported fields
}

func NewCachingGroupLoader 

func NewCachingGroupLoader(l rules.GroupLoader) *CachingGroupLoader

func (*CachingGroupLoader) AlertingRules 

func (l *CachingGroupLoader) AlertingRules() []rulefmt.Rule

func (*CachingGroupLoader) Load 

func (l *CachingGroupLoader) Load(identifier string) (*rulefmt.RuleGroups, []error)

func (*CachingGroupLoader) Parse 

func (l *CachingGroupLoader) Parse(query string) (parser.Expr, error)

func (*CachingGroupLoader) Prune 

func (l *CachingGroupLoader) Prune(toKeep []string)

type CachingRulesManager 

type CachingRulesManager struct {
	// contains filtered or unexported fields
}

CachingRulesManager holds a CachingGroupLoader to make sure the GroupLoader has consistent state after update operations. Manager needs to hold the same caching grouploader

func (*CachingRulesManager) RuleGroups 

func (m *CachingRulesManager) RuleGroups() []*rules.Group

func (*CachingRulesManager) Run 

func (m *CachingRulesManager) Run()

func (*CachingRulesManager) Stop 

func (m *CachingRulesManager) Stop()

func (*CachingRulesManager) Update 

func (m *CachingRulesManager) Update(interval time.Duration, files []string, externalLabels labels.Labels, externalURL string, ruleGroupPostProcessFunc rules.GroupEvalIterationFunc) error

Update reconciles the state of the CachingGroupLoader after a manager.Update. The GroupLoader is mutated as part of a call to Update but it might still contain removed files. Update tells the loader which files to keep

type Config 

type Config struct {
	ruler.Config `yaml:",inline"`

	WAL instance.Config `yaml:"wal,omitempty"`

	WALCleaner  cleaner.Config    `yaml:"wal_cleaner,omitempty"`
	RemoteWrite RemoteWriteConfig `` /* 134-byte string literal not displayed */

	Evaluation EvaluationConfig `yaml:"evaluation,omitempty" doc:"description=Configuration for rule evaluation."`
}

func (*Config) RegisterFlags 

func (c *Config) RegisterFlags(f *flag.FlagSet)

func (*Config) Validate 

func (c *Config) Validate() error

Validate overrides the embedded cortex variant which expects a cortex limits struct. Instead, copy the relevant bits over.

type EvaluationConfig 

type EvaluationConfig struct {
	Mode      string        `yaml:"mode,omitempty"`
	MaxJitter time.Duration `yaml:"max_jitter"`

	QueryFrontend QueryFrontendConfig `yaml:"query_frontend,omitempty"`
}

func (*EvaluationConfig) RegisterFlags 

func (c *EvaluationConfig) RegisterFlags(f *flag.FlagSet)

func (*EvaluationConfig) Validate 

func (c *EvaluationConfig) Validate() error

type Evaluator 

type Evaluator interface {
	// Eval evaluates the given rule and returns the result.
	Eval(ctx context.Context, qs string, now time.Time) (*logqlmodel.Result, error)
}

Evaluator is the interface that must be satisfied in order to accept rule evaluations from the Ruler.

func NewEvaluatorWithJitter 

func NewEvaluatorWithJitter(inner Evaluator, maxJitter time.Duration, hasher hash.Hash32, logger log.Logger) Evaluator

type EvaluatorWithJitter 

type EvaluatorWithJitter struct {
	// contains filtered or unexported fields
}

EvaluatorWithJitter wraps a given Evaluator. It applies a consistent jitter based on a rule's query string by hashing the query string to produce a 32-bit unsigned integer. From this hash, we calculate a ratio between 0 and 1 and multiply it by the configured max jitter. This ratio is used to delay evaluation by a consistent amount of random time.

Consistent jitter is important because it allows rules to be evaluated on a regular, predictable cadence while also ensuring that we spread evaluations across the configured jitter window to avoid resource contention scenarios.

func (*EvaluatorWithJitter) Eval 

func (e *EvaluatorWithJitter) Eval(ctx context.Context, qs string, now time.Time) (*logqlmodel.Result, error)

type GroupLoader 

type GroupLoader struct{}

func (GroupLoader) Load 

func (g GroupLoader) Load(identifier string) (*rulefmt.RuleGroups, []error)

func (GroupLoader) Parse 

func (GroupLoader) Parse(query string) (parser.Expr, error)

type LocalEvaluator 

type LocalEvaluator struct {
	// contains filtered or unexported fields
}

func NewLocalEvaluator 

func NewLocalEvaluator(engine *logql.Engine, logger log.Logger) (*LocalEvaluator, error)

func (*LocalEvaluator) Eval 

func (l *LocalEvaluator) Eval(ctx context.Context, qs string, now time.Time) (*logqlmodel.Result, error)

type MemStore 

type MemStore struct {
	// contains filtered or unexported fields
}

func NewMemStore 

func NewMemStore(userID string, queryFunc rules.QueryFunc, metrics *memstoreMetrics, cleanupInterval time.Duration, logger log.Logger) *MemStore

func (*MemStore) Querier 

func (m *MemStore) Querier(ctx context.Context, _, maxt int64) (storage.Querier, error)

implement storage.Queryable. It is only called with the desired ts as maxtime. Mint is parameterized via the outage tolerance, but since we're synthetically generating these, we only care about the desired time.

func (*MemStore) Start 

func (m *MemStore) Start(iter RuleIter)

Calling Start will set the RuleIter, unblock the MemStore, and start the run() function in a separate goroutine.

func (*MemStore) Stop 

func (m *MemStore) Stop()

type Middleware 

type Middleware func(ctx context.Context, req *httpgrpc.HTTPRequest) error

Middleware provides a mechanism to inspect outgoing remote querier requests.

type MultiTenantManager 

type MultiTenantManager struct {
	// contains filtered or unexported fields
}

MultiTenantManager wraps a cortex MultiTenantManager but validates loki rules

func (*MultiTenantManager) GetRules 

func (m *MultiTenantManager) GetRules(userID string) []*rules.Group

func (*MultiTenantManager) Stop 

func (m *MultiTenantManager) Stop()

func (*MultiTenantManager) SyncRuleGroups 

func (m *MultiTenantManager) SyncRuleGroups(ctx context.Context, ruleGroups map[string]rulespb.RuleGroupList)

func (*MultiTenantManager) ValidateRuleGroup 

func (m *MultiTenantManager) ValidateRuleGroup(grp rulefmt.RuleGroup) []error

ValidateRuleGroup validates a rulegroup

type QueryFrontendConfig 

type QueryFrontendConfig struct {
	// The address of the remote querier to connect to.
	Address string `yaml:"address"`

	// TLSEnabled tells whether TLS should be used to establish remote connection.
	TLSEnabled bool `yaml:"tls_enabled"`

	// TLS is the config for client TLS.
	TLS tls.ClientConfig `yaml:",inline"`
}

QueryFrontendConfig defines query-frontend transport configuration.

func (*QueryFrontendConfig) RegisterFlags 

func (c *QueryFrontendConfig) RegisterFlags(f *flag.FlagSet)

type RemoteEvaluator 

type RemoteEvaluator struct {
	// contains filtered or unexported fields
}

func NewRemoteEvaluator 

func NewRemoteEvaluator(client httpgrpc.HTTPClient, overrides RulesLimits, logger log.Logger, registerer prometheus.Registerer) (*RemoteEvaluator, error)

func (*RemoteEvaluator) Eval 

func (r *RemoteEvaluator) Eval(ctx context.Context, qs string, now time.Time) (*logqlmodel.Result, error)

func (*RemoteEvaluator) Query 

func (r *RemoteEvaluator) Query(ctx context.Context, ch chan<- queryResponse, orgID, qs string, t time.Time)

Query performs a query for the given time.

type RemoteWriteConfig 

type RemoteWriteConfig struct {
	Client              *config.RemoteWriteConfig           `yaml:"client,omitempty" doc:"deprecated|description=Use 'clients' instead. Configure remote write client."`
	Clients             map[string]config.RemoteWriteConfig `yaml:"clients,omitempty" doc:"description=Configure remote write clients. A map with remote client id as key."`
	Enabled             bool                                `yaml:"enabled"`
	ConfigRefreshPeriod time.Duration                       `yaml:"config_refresh_period"`
}

func (*RemoteWriteConfig) Clone 

func (c *RemoteWriteConfig) Clone() (*RemoteWriteConfig, error)

func (*RemoteWriteConfig) RegisterFlags 

func (c *RemoteWriteConfig) RegisterFlags(f *flag.FlagSet)

RegisterFlags adds the flags required to config this to the given FlagSet.

func (*RemoteWriteConfig) Validate 

func (c *RemoteWriteConfig) Validate() error

type RuleCache 

type RuleCache struct {
	// contains filtered or unexported fields
}

func NewRuleCache 

func NewRuleCache(metrics *memstoreMetrics) *RuleCache

func (*RuleCache) CleanupOldSamples 

func (c *RuleCache) CleanupOldSamples(olderThan time.Time) (empty bool)

CleanupOldSamples removes samples that are outside of the rule's `For` duration.

func (*RuleCache) Get 

func (c *RuleCache) Get(ts time.Time, ls labels.Labels) (*promql.Sample, bool)

Get returns ok if that timestamp's result is cached.

func (*RuleCache) Set 

func (c *RuleCache) Set(ts time.Time, vec promql.Vector)

type RuleIter 

type RuleIter interface {
	AlertingRules() []rulefmt.Rule
}

type RulesLimits 

type RulesLimits interface {
	ruler.RulesLimits

	RulerRemoteWriteDisabled(userID string) bool
	RulerRemoteWriteURL(userID string) string
	RulerRemoteWriteTimeout(userID string) time.Duration
	RulerRemoteWriteHeaders(userID string) map[string]string
	RulerRemoteWriteRelabelConfigs(userID string) []*util.RelabelConfig
	RulerRemoteWriteConfig(userID string, id string) *config.RemoteWriteConfig
	RulerRemoteWriteQueueCapacity(userID string) int
	RulerRemoteWriteQueueMinShards(userID string) int
	RulerRemoteWriteQueueMaxShards(userID string) int
	RulerRemoteWriteQueueMaxSamplesPerSend(userID string) int
	RulerRemoteWriteQueueBatchSendDeadline(userID string) time.Duration
	RulerRemoteWriteQueueMinBackoff(userID string) time.Duration
	RulerRemoteWriteQueueMaxBackoff(userID string) time.Duration
	RulerRemoteWriteQueueRetryOnRateLimit(userID string) bool
	RulerRemoteWriteSigV4Config(userID string) *sigv4.SigV4Config

	RulerRemoteEvaluationTimeout(userID string) time.Duration
	RulerRemoteEvaluationMaxResponseSize(userID string) int64
}

RulesLimits is the one function we need from limits.Overrides, and is here to limit coupling.

Source Files

View all Source files

Directories

Path Synopsis
bucketclient
configdb
local
objectclient
storage
cleaner
This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.
 This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.
instance
This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.
 This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.
util
This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.
 This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.
wal
This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.
 This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.

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