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NETOBSERV-101 R&D: Kube enricher write path for downstream operator #260

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NETOBSERV-101 R&D: Kube enricher write path for downstream operator #260

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1 change: 1 addition & 0 deletions docs/api.md
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Expand Up @@ -126,6 +126,7 @@ Following is the supported API format for writing to loki:
loki:
url: the address of an existing Loki service to push the flows to
tenantID: identifies the tenant for the request
authorizationTokenPath: authorization header path to parse and send to loki gateway
batchWait: maximum amount of time to wait before sending a batch
batchSize: maximum batch size (in bytes) of logs to accumulate before sending
timeout: maximum time to wait for a server to respond to a request
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27 changes: 14 additions & 13 deletions pkg/api/write_loki.go
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Expand Up @@ -26,19 +26,20 @@ import (
)

type WriteLoki struct {
URL string `yaml:"url,omitempty" json:"url,omitempty" doc:"the address of an existing Loki service to push the flows to"`
TenantID string `yaml:"tenantID,omitempty" json:"tenantID,omitempty" doc:"identifies the tenant for the request"`
BatchWait string `yaml:"batchWait,omitempty" json:"batchWait,omitempty" doc:"maximum amount of time to wait before sending a batch"`
BatchSize int `yaml:"batchSize,omitempty" json:"batchSize,omitempty" doc:"maximum batch size (in bytes) of logs to accumulate before sending"`
Timeout string `yaml:"timeout,omitempty" json:"timeout,omitempty" doc:"maximum time to wait for a server to respond to a request"`
MinBackoff string `yaml:"minBackoff,omitempty" json:"minBackoff,omitempty" doc:"initial backoff time for client connection between retries"`
MaxBackoff string `yaml:"maxBackoff,omitempty" json:"maxBackoff,omitempty" doc:"maximum backoff time for client connection between retries"`
MaxRetries int `yaml:"maxRetries,omitempty" json:"maxRetries,omitempty" doc:"maximum number of retries for client connections"`
Labels []string `yaml:"labels,omitempty" json:"labels,omitempty" doc:"map of record fields to be used as labels"`
StaticLabels model.LabelSet `yaml:"staticLabels,omitempty" json:"staticLabels,omitempty" doc:"map of common labels to set on each flow"`
IgnoreList []string `yaml:"ignoreList,omitempty" json:"ignoreList,omitempty" doc:"map of record fields to be removed from the record"`
ClientConfig *promConfig.HTTPClientConfig `yaml:"clientConfig,omitempty" json:"clientConfig,omitempty" doc:"clientConfig"`
TimestampLabel model.LabelName `yaml:"timestampLabel,omitempty" json:"timestampLabel,omitempty" doc:"label to use for time indexing"`
URL string `yaml:"url,omitempty" json:"url,omitempty" doc:"the address of an existing Loki service to push the flows to"`
TenantID string `yaml:"tenantID,omitempty" json:"tenantID,omitempty" doc:"identifies the tenant for the request"`
BearerAuthTokenPath string `yaml:"bearerAuthTokenPath,omitempty" json:"bearerAuthTokenPath,omitempty" doc:"bearer authorization header path to parse and send to loki gateway"`
BatchWait string `yaml:"batchWait,omitempty" json:"batchWait,omitempty" doc:"maximum amount of time to wait before sending a batch"`
BatchSize int `yaml:"batchSize,omitempty" json:"batchSize,omitempty" doc:"maximum batch size (in bytes) of logs to accumulate before sending"`
Timeout string `yaml:"timeout,omitempty" json:"timeout,omitempty" doc:"maximum time to wait for a server to respond to a request"`
MinBackoff string `yaml:"minBackoff,omitempty" json:"minBackoff,omitempty" doc:"initial backoff time for client connection between retries"`
MaxBackoff string `yaml:"maxBackoff,omitempty" json:"maxBackoff,omitempty" doc:"maximum backoff time for client connection between retries"`
MaxRetries int `yaml:"maxRetries,omitempty" json:"maxRetries,omitempty" doc:"maximum number of retries for client connections"`
Labels []string `yaml:"labels,omitempty" json:"labels,omitempty" doc:"map of record fields to be used as labels"`
StaticLabels model.LabelSet `yaml:"staticLabels,omitempty" json:"staticLabels,omitempty" doc:"map of common labels to set on each flow"`
IgnoreList []string `yaml:"ignoreList,omitempty" json:"ignoreList,omitempty" doc:"map of record fields to be removed from the record"`
ClientConfig *promConfig.HTTPClientConfig `yaml:"clientConfig,omitempty" json:"clientConfig,omitempty" doc:"clientConfig"`
TimestampLabel model.LabelName `yaml:"timestampLabel,omitempty" json:"timestampLabel,omitempty" doc:"label to use for time indexing"`
// TimestampScale provides the scale in time of the units from the timestamp
// E.g. UNIX timescale is '1s' (one second) while other clock sources might have
// scales of '1ms' (one millisecond) or just '1' (one nanosecond)
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19 changes: 15 additions & 4 deletions pkg/pipeline/write/write_loki.go
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Expand Up @@ -20,6 +20,7 @@ package write
import (
"encoding/json"
"fmt"
"io/ioutil"
"math"
"strings"
"time"
Expand Down Expand Up @@ -85,11 +86,21 @@ func buildLokiConfig(c *api.WriteLoki) (loki.Config, error) {
return loki.Config{}, fmt.Errorf("failed in parsing MaxBackoff : %v", err)
}

authorization := ""
if c.BearerAuthTokenPath != "" {
bytes, err := ioutil.ReadFile(c.BearerAuthTokenPath)
if err != nil {
return loki.Config{}, fmt.Errorf("failed to parse authorization path: %s %w", c.BearerAuthTokenPath, err)
}
authorization = "Bearer " + string(bytes)
}

cfg := loki.Config{
TenantID: c.TenantID,
BatchWait: batchWait,
BatchSize: c.BatchSize,
Timeout: timeout,
TenantID: c.TenantID,
Authorization: authorization,
BatchWait: batchWait,
BatchSize: c.BatchSize,
Timeout: timeout,
BackoffConfig: backoff.BackoffConfig{
MinBackoff: minBackoff,
MaxBackoff: maxBackoff,
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