k-space/logmower-shipper
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work on flags

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rasmus 2022-11-11 17:09:12 +02:00
parent 2ded62f641
commit 0b3d382742
7 changed files with 67 additions and 67 deletions
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16
pkg/file/file.go
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@ -7,8 +7,8 @@ import (
"io"
"log"
"os"
"time"
"git.k-space.ee/k-space/logmower-shipper/pkg/globals"
"git.k-space.ee/k-space/logmower-shipper/pkg/lines"
m "git.k-space.ee/k-space/logmower-shipper/pkg/mongo"
"git.k-space.ee/k-space/logmower-shipper/pkg/sender"
@ -21,6 +21,16 @@ import (
const SendQueueLimit = 1024
// wrapper to force copying before use
func backoff() wait.Backoff {
return wait.Backoff{
Duration: 2 * time.Second,
Factor: 1.5,
Jitter: 0.1,
Cap: 30 * time.Second,
}
}
type File struct {
*m.File
MetricsName string // filepath.Base()
@ -28,7 +38,7 @@ type File struct {
// TODO: caller could call duplicate shipFile of same name on file replace: sends might not work properly
func (f File) Process(ctx context.Context, db *mongo.Collection) {
_ = wait.ManagedExponentialBackoffWithContext(ctx, globals.Backoff(), func() (done bool, _ error) {
_ = wait.ManagedExponentialBackoffWithContext(ctx, backoff(), func() (done bool, _ error) {
err := f.process(ctx, db)
if err == nil {
return true, nil
@ -74,7 +84,7 @@ func (f File) process(ctx context.Context, db *mongo.Collection) error {
defer dfn()
// get files with offset
offsetResult, _ := mongoWithErr(db.FindOne(globals.MongoTimeout(sctx),
offsetResult, _ := mongoWithErr(db.FindOne(m.GlobalTimeout(sctx),
bson.D{{Key: m.RecordKeyHostId, Value: f.Host.Id}, {Key: m.RecordKeyFilePath, Value: f.Path}},
&mongoOpt.FindOneOptions{Sort: bson.D{{Key: m.RecordKeyOffset, Value: -1}}}, // sort descending (get largest)
))

32
pkg/globals/globals.go
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@ -1,36 +1,8 @@
package globals
import (
"context"
"time"
"k8s.io/apimachinery/pkg/util/wait"
)
// Did not find any better way for multipackage prefixing
const (
PrometheusPrefix = "logmower"
AppName = PrometheusPrefix + "shipper"
DatabaseCommandTimeout = 10 * time.Second
PrometheusPrefix = "logmower"
AppName = PrometheusPrefix + "shipper"
)
var (
BufferLimitBytes int
Simulate bool
)
func MongoTimeout(ctx context.Context) context.Context {
ctx, _ = context.WithTimeout(ctx, DatabaseCommandTimeout) //nolint:lostcancel (cancelled by mongo, should be bug on them //TODO)
return ctx
}
// wrapper to force copying before use
func Backoff() wait.Backoff {
return wait.Backoff{
Duration: 2 * time.Second,
Factor: 1.5,
Jitter: 0.1,
Cap: 30 * time.Second,
}
}

7
pkg/lines/lines.go
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@ -5,10 +5,11 @@ import (
"log"
"sync"
"git.k-space.ee/k-space/logmower-shipper/pkg/globals"
m "git.k-space.ee/k-space/logmower-shipper/pkg/mongo"
)
var BufferLimitBytes int
type (
RawC <-chan Raw
Raw struct {
@ -87,9 +88,9 @@ func (lines singleLines) process(ctx context.Context, parsed chan<- m.Record) {
buffer = append(buffer, line.B...)
if len(buffer) > globals.BufferLimitBytes {
if len(buffer) > BufferLimitBytes && BufferLimitBytes != 0 {
promRecordDroppedTooLarge.WithLabelValues(line.MetricsName).Add(1)
log.Printf("dropped record: size in bytes exceeds limit of %d", globals.BufferLimitBytes)
log.Printf("dropped record: size in bytes exceeds limit of %d", BufferLimitBytes)
buffer = nil
continue

22
pkg/mongo/metrics.go
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@ -20,15 +20,15 @@ var promDbHeartbeat = promauto.NewHistogramVec(prom.HistogramOpts{
Buckets: []float64{0.1, 0.2, 0.5, 1, 5, 10, 50},
}, []string{"connection_id"})
func monitoredClientOptions() *mongoOpt.ClientOptions {
return mongoOpt.Client().
SetServerMonitor(&mongoEvent.ServerMonitor{
ServerHeartbeatSucceeded: func(ev *mongoEvent.ServerHeartbeatSucceededEvent) {
promDbHeartbeat.WithLabelValues(ev.ConnectionID).Observe(time.Duration(ev.DurationNanos).Seconds())
},
ServerHeartbeatFailed: func(ev *mongoEvent.ServerHeartbeatFailedEvent) {
promDbHeartbeat.WithLabelValues(ev.ConnectionID).Observe(0)
log.Printf("database heartbeat failed on connection %q: %e", ev.ConnectionID, ev.Failure)
},
})
func attachMetrics(opts *mongoOpt.ClientOptions) *mongoOpt.ClientOptions {
opts.SetServerMonitor(&mongoEvent.ServerMonitor{
ServerHeartbeatSucceeded: func(ev *mongoEvent.ServerHeartbeatSucceededEvent) {
promDbHeartbeat.WithLabelValues(ev.ConnectionID).Observe(time.Duration(ev.DurationNanos).Seconds())
},
ServerHeartbeatFailed: func(ev *mongoEvent.ServerHeartbeatFailedEvent) {
promDbHeartbeat.WithLabelValues(ev.ConnectionID).Observe(0)
log.Printf("database heartbeat failed on connection %q: %e", ev.ConnectionID, ev.Failure)
},
})
return opts
}

20
pkg/mongo/mongo.go
View File

@ -4,12 +4,20 @@ import (
"context"
"fmt"
"net/url"
"time"
"git.k-space.ee/k-space/logmower-shipper/pkg/globals"
"go.mongodb.org/mongo-driver/mongo"
mongoOpt "go.mongodb.org/mongo-driver/mongo/options"
)
func Initialize(ctx context.Context, uri string) (*mongo.Collection, error) {
const CommandTimeout = 10 * time.Second
func GlobalTimeout(ctx context.Context) context.Context {
ctx, _ = context.WithTimeout(ctx, CommandTimeout) //nolint:lostcancel (cancelled by mongo, should be bug on them //TODO)
return ctx
}
func Initialize(ctx context.Context, uri string, opts *mongoOpt.ClientOptions) (*mongo.Collection, error) {
uriParsed, err := url.ParseRequestURI(uri)
if err != nil {
return nil, fmt.Errorf("parsing URI for database name: %w", err)
@ -20,20 +28,20 @@ func Initialize(ctx context.Context, uri string) (*mongo.Collection, error) {
return nil, fmt.Errorf("URI must include database name (as database to authenticate against)")
}
dbOpt := monitoredClientOptions().ApplyURI(uri)
dbOpt := attachMetrics(opts).ApplyURI(uri)
dbClient, err := mongo.Connect(globals.MongoTimeout(ctx), dbOpt)
dbClient, err := mongo.Connect(GlobalTimeout(ctx), dbOpt)
if err != nil {
return nil, fmt.Errorf("connecting to %q: %w", dbOpt.GetURI(), err)
}
if err := dbClient.Ping(globals.MongoTimeout(ctx), nil); err != nil {
if err := dbClient.Ping(GlobalTimeout(ctx), nil); err != nil {
return nil, fmt.Errorf("first ping to database: %w", err)
}
col := dbClient.Database(uriParsed.Path).Collection("logs")
if err := InitializeIndexes(globals.MongoTimeout(ctx), col); err != nil {
if err := InitializeIndexes(GlobalTimeout(ctx), col); err != nil {
return nil, fmt.Errorf("initializing indexes: %w", err)
}

13
pkg/sender/sender.go
View File

@ -6,16 +6,19 @@ import (
"log"
"time"
"git.k-space.ee/k-space/logmower-shipper/pkg/globals"
m "git.k-space.ee/k-space/logmower-shipper/pkg/mongo"
"github.com/jtagcat/util"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
var (
Simulate = false
MaxBatchItems = 1000
)
const (
MaxBatchItems = 10000
MaxBatchTime = 5 * time.Second
MaxBatchTime = 5 * time.Second
)
type Queue <-chan m.Record
@ -86,14 +89,14 @@ func (queue Queue) Sender(db *mongo.Collection, metricsFilename string, cancelOn
}
func insertManyWithSimulate(db *mongo.Collection, batch []m.Record) (*mongo.InsertManyResult, error) {
if !globals.Simulate {
if !Simulate {
var batchBson []interface{} // mongo does not like typing
for _, b := range batch {
batchBson = append(batchBson, b.ToBson())
}
tru := true
return db.InsertMany(globals.MongoTimeout(context.Background()), batchBson, &options.InsertManyOptions{Ordered: &tru})
return db.InsertMany(m.GlobalTimeout(context.Background()), batchBson, &options.InsertManyOptions{Ordered: &tru})
}
fmt.Printf("simulating successful database bulk write: %v", batch)

24
pkg/watcher/app.go
View File

@ -8,10 +8,13 @@ import (
"git.k-space.ee/k-space/logmower-shipper/pkg/file"
"git.k-space.ee/k-space/logmower-shipper/pkg/globals"
"git.k-space.ee/k-space/logmower-shipper/pkg/lines"
m "git.k-space.ee/k-space/logmower-shipper/pkg/mongo"
"git.k-space.ee/k-space/logmower-shipper/pkg/sender"
"git.k-space.ee/k-space/logmower-shipper/pkg/util"
"github.com/fsnotify/fsnotify"
"github.com/urfave/cli/v2"
mongoOpt "go.mongodb.org/mongo-driver/mongo/options"
)
var App = &cli.App{
@ -20,39 +23,42 @@ var App = &cli.App{
Authors: []*cli.Author{{Name: "jtagcat"}, {Name: "codemowers.io"}},
Description: "Collect and ship kubernetes logs",
// Usage: "rubykana <input>",
// TODO: #2: yaml
Flags: []cli.Flag{
&cli.BoolFlag{Name: "simulate", Aliases: []string{"dry-run"}, Usage: "Do not write to database"},
&cli.StringFlag{Name: "log-directory", Usage: "Directory to watch for logs", Value: "/var/log/containers"},
&cli.IntFlag{Name: "max-record-size", Value: 128 * 1024, Usage: "Maximum record size in bytes"},
&cli.IntFlag{Name: "max-record-size", EnvVars: []string{"MAX_RECORD_SIZE"}, Value: 128 * 1024, Usage: "Maximum record size in bytes"},
&cli.IntFlag{Name: "bulk-insertion-size", EnvVars: []string{"BULK_INSERTION_SIZE"}, Value: 1000, Usage: "MongoDB bulk insertion size in records"},
&cli.Uint64Flag{Name: "max-connection-pool-size", EnvVars: []string{"MAX_CONNECTION_POOL_SIZE"}, Value: 1, Usage: "Max MongoDB connection pool size"},
//
//TODO: &cli.BoolFlag{Name: "normalize-log-level", Usage: "Normalize log.level values to Syslog defined keywords"},
//TODO: &cli.BoolFlag{Name: "parse-json"},
//
&cli.StringSliceFlag{Category: "selectors", Name: "namespace", EnvVars: []string{"KUBE_NAMESPACE"}, Usage: "whitelist filter for filenames"},
&cli.StringSliceFlag{Category: "selectors", Name: "pod-prefix", EnvVars: []string{"KUBE_NODE_NAME"}, Usage: "blacklist filter for filenames"},
&cli.StringSliceFlag{Category: "selectors", Name: "namespace", EnvVars: []string{"NAMESPACE"}, Usage: "whitelist filter for filenames"},
&cli.StringSliceFlag{Category: "selectors", Name: "exclude-pod-prefixes", EnvVars: []string{"EXCLUDE_POD_PREFIXES"}, Usage: "blacklist filter for filenames", Value: cli.NewStringSlice("logmower-")},
//
&cli.StringFlag{Category: "secrets", Name: "mongo-uri", EnvVars: []string{"MONGODB_URI"}, Usage: "mongodb://foo:bar@host:27017/database", Required: true},
},
Before: func(ctx *cli.Context) error {
globals.BufferLimitBytes = ctx.Int("max-record-size")
if globals.BufferLimitBytes < 1 {
lines.BufferLimitBytes = ctx.Int("max-record-size")
if lines.BufferLimitBytes < 1 {
return fmt.Errorf("max-record-size must be positive")
}
globals.Simulate = ctx.Bool("simulate")
sender.Simulate = ctx.Bool("simulate")
sender.MaxBatchItems = ctx.Int("bulk-insertion-size")
return nil
},
Action: func(ctx *cli.Context) error {
whitelistNamespaces, blacklistPodPrefixes := sliceToMap(ctx.StringSlice("namespace")), ctx.StringSlice("pod-prefix")
whitelistNamespaces, blacklistPodPrefixes := sliceToMap(ctx.StringSlice("namespace")), ctx.StringSlice("exclude-pod-prefixes")
var wg sync.WaitGroup
log.Printf("%s %s starting", ctx.App.Name, ctx.App.Version)
db, err := m.Initialize(ctx.Context, ctx.String("mongo-uri"))
db, err := m.Initialize(ctx.Context, ctx.String("mongo-uri"), mongoOpt.Client().
SetMaxPoolSize(ctx.Uint64("max-connection-pool-size")))
if err != nil {
return fmt.Errorf("initializing database connection: %w", err)
}