forked from prometheus/alertmanager
/
silence_query.go
156 lines (130 loc) · 5.04 KB
/
silence_query.go
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// Copyright 2018 Prometheus Team
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cli
import (
"context"
"errors"
"fmt"
"strings"
"time"
"github.com/prometheus/client_golang/api"
"gopkg.in/alecthomas/kingpin.v2"
"github.com/prometheus/alertmanager/cli/format"
"github.com/prometheus/alertmanager/client"
"github.com/prometheus/alertmanager/pkg/parse"
"github.com/prometheus/alertmanager/types"
)
type silenceQueryCmd struct {
expired bool
quiet bool
matchers []string
within time.Duration
}
const querySilenceHelp = `Query Alertmanager silences.
Amtool has a simplified prometheus query syntax, but contains robust support for
bash variable expansions. The non-option section of arguments constructs a list
of "Matcher Groups" that will be used to filter your query. The following
examples will attempt to show this behaviour in action:
amtool silence query alertname=foo node=bar
This query will match all silences with the alertname=foo and node=bar label
value pairs set.
amtool silence query foo node=bar
If alertname is omitted and the first argument does not contain a '=' or a
'=~' then it will be assumed to be the value of the alertname pair.
amtool silence query 'alertname=~foo.*'
As well as direct equality, regex matching is also supported. The '=~' syntax
(similar to prometheus) is used to represent a regex match. Regex matching
can be used in combination with a direct match.
In addition to filtering by silence labels, one can also query for silences
that are due to expire soon with the "--within" parameter. In the event that
you want to preemptively act upon expiring silences by either fixing them or
extending them. For example:
amtool silence query --within 8h
returns all the silences due to expire within the next 8 hours. This syntax can
also be combined with the label based filtering above for more flexibility.
The "--expired" parameter returns only expired silences. Used in combination
with "--within=TIME", amtool returns the silences that expired within the
preceding duration.
amtool silence query --within 2h --expired
returns all silences that expired within the preceeding 2 hours.
`
func configureSilenceQueryCmd(cc *kingpin.CmdClause) {
var (
c = &silenceQueryCmd{}
queryCmd = cc.Command("query", querySilenceHelp).Default()
)
queryCmd.Flag("expired", "Show expired silences instead of active").BoolVar(&c.expired)
queryCmd.Flag("quiet", "Only show silence ids").Short('q').BoolVar(&c.quiet)
queryCmd.Arg("matcher-groups", "Query filter").StringsVar(&c.matchers)
queryCmd.Flag("within", "Show silences that will expire or have expired within a duration").DurationVar(&c.within)
queryCmd.Action(c.query)
}
func (c *silenceQueryCmd) query(ctx *kingpin.ParseContext) error {
var filterString = ""
if len(c.matchers) == 1 {
// If the parser fails then we likely don't have a (=|=~|!=|!~) so lets
// assume that the user wants alertname=<arg> and prepend `alertname=`
// to the front.
_, err := parse.Matcher(c.matchers[0])
if err != nil {
filterString = fmt.Sprintf("{alertname=%s}", c.matchers[0])
} else {
filterString = fmt.Sprintf("{%s}", strings.Join(c.matchers, ","))
}
} else if len(c.matchers) > 1 {
filterString = fmt.Sprintf("{%s}", strings.Join(c.matchers, ","))
}
apiClient, err := api.NewClient(api.Config{Address: alertmanagerURL.String()})
if err != nil {
return err
}
silenceAPI := client.NewSilenceAPI(apiClient)
fetchedSilences, err := silenceAPI.List(context.Background(), filterString)
if err != nil {
return err
}
displaySilences := []types.Silence{}
for _, silence := range fetchedSilences {
// skip expired silences if --expired is not set
if !c.expired && silence.EndsAt.Before(time.Now()) {
continue
}
// skip active silences if --expired is set
if c.expired && silence.EndsAt.After(time.Now()) {
continue
}
// skip active silences expiring after "--within"
if !c.expired && int64(c.within) > 0 && silence.EndsAt.After(time.Now().UTC().Add(c.within)) {
continue
}
// skip silences that expired before "--within"
if c.expired && int64(c.within) > 0 && silence.EndsAt.Before(time.Now().UTC().Add(-c.within)) {
continue
}
displaySilences = append(displaySilences, *silence)
}
if c.quiet {
for _, silence := range displaySilences {
fmt.Println(silence.ID)
}
} else {
formatter, found := format.Formatters[output]
if !found {
return errors.New("unknown output formatter")
}
if err := formatter.FormatSilences(displaySilences); err != nil {
return fmt.Errorf("error formatting silences: %v", err)
}
}
return nil
}