/
alerts.go
129 lines (109 loc) · 2.77 KB
/
alerts.go
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package main
import (
"context"
"fmt"
"github.com/function61/eventhorizon/pkg/ehevent"
"github.com/function61/gokit/ossignal"
"github.com/function61/gokit/stringutils"
"github.com/function61/lambda-alertmanager/pkg/amdomain"
"github.com/function61/lambda-alertmanager/pkg/amstate"
"github.com/scylladb/termtables"
"github.com/spf13/cobra"
"strings"
"time"
)
func alertEntry() *cobra.Command {
cmd := &cobra.Command{
Use: "alert",
Short: "Manage alerts",
}
cmd.AddCommand(&cobra.Command{
Use: "mk [subject] [details]",
Short: "Raise an alert",
Args: cobra.ExactArgs(2),
Run: func(cmd *cobra.Command, args []string) {
exitIfError(alertRaise(
ossignal.InterruptOrTerminateBackgroundCtx(nil),
args[0],
args[1]))
},
})
cmd.AddCommand(&cobra.Command{
Use: "ls",
Short: "List active alerts",
Args: cobra.NoArgs,
Run: func(cmd *cobra.Command, args []string) {
exitIfError(alertList(
ossignal.InterruptOrTerminateBackgroundCtx(nil)))
},
})
cmd.AddCommand(&cobra.Command{
Use: "ack [id]",
Short: "Acknowledge an alert",
Args: cobra.ExactArgs(1),
Run: func(cmd *cobra.Command, args []string) {
exitIfError(alertAck(
ossignal.InterruptOrTerminateBackgroundCtx(nil),
args[0]))
},
})
return cmd
}
func alertRaise(ctx context.Context, subject string, details string) error {
app, err := getApp(ctx)
if err != nil {
return err
}
raised := amdomain.NewAlertRaised(
amstate.NewAlertId(),
subject,
details,
ehevent.MetaSystemUser(time.Now()))
return app.Reader.TransactWrite(ctx, func() error {
if amstate.FindAlertWithSubject(subject, app.State.ActiveAlerts()) != nil {
return fmt.Errorf("already active have alert: %s", subject)
}
return app.AppendAfter(ctx, app.State.Version(), raised)
})
}
func alertList(ctx context.Context) error {
app, err := getApp(ctx)
if err != nil {
return err
}
view := termtables.CreateTable()
view.AddHeaders("Id", "Raised", "Subject", "Details")
for _, alert := range app.State.ActiveAlerts() {
view.AddRow(
alert.Id,
alert.Timestamp.Format(time.RFC3339),
alert.Subject,
stringutils.Truncate(removeLinebreaks(alert.Details), 50))
}
fmt.Println(view.Render())
return nil
}
func alertAck(ctx context.Context, alertId string) error {
app, err := getApp(ctx)
if err != nil {
return err
}
acked := amdomain.NewAlertAcknowledged(
alertId,
ehevent.MetaSystemUser(time.Now()))
return app.Reader.TransactWrite(ctx, func() error {
if !amstate.HasAlertWithId(alertId, app.State.ActiveAlerts()) {
return fmt.Errorf("no alert: %s", alertId)
}
return app.AppendAfter(ctx, app.State.Version(), acked)
})
}
func removeLinebreaks(input string) string {
return strings.ReplaceAll(
strings.ReplaceAll(
input,
"\r",
`\r`),
"\n",
`\n`)
}