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cherry-pick kubernetes#6035 into 1.27
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@k8s-ci-robot @madufresneelastic
k8s-ci-robot authored and madufresneelastic committed Aug 28, 2023
1 parent 3430436 commit 7053dd3
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15 changes: 15 additions & 0 deletions cluster-autoscaler/FAQ.md
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Expand Up @@ -29,6 +29,7 @@ this document:
* [I'm running cluster with nodes in multiple zones for HA purposes. Is that supported by Cluster Autoscaler?](#im-running-cluster-with-nodes-in-multiple-zones-for-ha-purposes-is-that-supported-by-cluster-autoscaler)
* [How can I monitor Cluster Autoscaler?](#how-can-i-monitor-cluster-autoscaler)
* [How can I increase the information that the CA is logging?](#how-can-i-increase-the-information-that-the-ca-is-logging)
* [How can I change the log format that the CA outputs?](#how-can-i-change-the-log-format-that-the-ca-outputs)
* [How can I see all the events from Cluster Autoscaler?](#how-can-i-see-all-events-from-cluster-autoscaler)
* [How can I scale my cluster to just 1 node?](#how-can-i-scale-my-cluster-to-just-1-node)
* [How can I scale a node group to 0?](#how-can-i-scale-a-node-group-to-0)
Expand Down Expand Up @@ -916,6 +917,20 @@ or infrastructure endpoints, then setting a value of `--v=9` will show all the i
HTTP calls made. Be aware that using verbosity levels higher than `--v=1` will generate
an increased amount of logs, prepare your deployments and storage accordingly.

### How Can I change the log format that the CA outputs?

There are 2 log format options, `text` and `json`. By default (`text`), the Cluster Autoscaler will output
logs in the [klog native format](https://kubernetes.io/docs/concepts/cluster-administration/system-logs/#klog-output).
```
I0823 17:15:11.472183 29944 main.go:569] Cluster Autoscaler 1.28.0-beta.0
```

Alternatively, adding the flag `--logging-format=json` changes the
[log output to json](https://kubernetes.io/docs/concepts/cluster-administration/system-logs/#klog-output).
```
{"ts":1692825334994.433,"caller":"cluster-autoscaler/main.go:569","msg":"Cluster Autoscaler 1.28.0-beta.0\n","v":1}
```

### What events are emitted by CA?

Whenever Cluster Autoscaler adds or removes nodes it will create events
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1 change: 1 addition & 0 deletions cluster-autoscaler/go.mod
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Expand Up @@ -92,6 +92,7 @@ require (
github.com/fsnotify/fsnotify v1.6.0 // indirect
github.com/go-logr/logr v1.2.4 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/go-logr/zapr v1.2.3 // indirect
github.com/go-openapi/jsonpointer v0.19.6 // indirect
github.com/go-openapi/jsonreference v0.20.2 // indirect
github.com/go-openapi/swag v0.22.3 // indirect
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8 changes: 8 additions & 0 deletions cluster-autoscaler/go.sum
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Expand Up @@ -115,6 +115,7 @@ github.com/aws/aws-sdk-go v1.35.24/go.mod h1:tlPOdRjfxPBpNIwqDj61rmsnA85v9jc0Ps9
github.com/aws/aws-sdk-go v1.44.241 h1:D3KycZq3HjhmjYGzvTcmX/Ztf/KNmsfTmdDuKdnzZKo=
github.com/aws/aws-sdk-go v1.44.241/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
Expand Down Expand Up @@ -254,6 +255,7 @@ github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbV
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/go-logr/zapr v1.2.3 h1:a9vnzlIBPQBBkeaR9IuMUfmVOrQlkoC4YfPoFkX3T7A=
github.com/go-logr/zapr v1.2.3/go.mod h1:eIauM6P8qSvTw5o2ez6UEAfGjQKrxQTl5EoK+Qa2oG4=
github.com/go-openapi/jsonpointer v0.19.6 h1:eCs3fxoIi3Wh6vtgmLTOjdhSpiqphQ+DaPn38N2ZdrE=
github.com/go-openapi/jsonpointer v0.19.6/go.mod h1:osyAmYz/mB/C3I+WsTTSgw1ONzaLJoLCyoi6/zppojs=
github.com/go-openapi/jsonreference v0.20.2 h1:3sVjiK66+uXK/6oQ8xgcRKcFgQ5KXa2KvnJRumpMGbE=
Expand Down Expand Up @@ -660,13 +662,17 @@ go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqe
go.opentelemetry.io/proto/otlp v0.19.0 h1:IVN6GR+mhC4s5yfcTbmzHYODqvWAp3ZedA2SJPI1Nnw=
go.opentelemetry.io/proto/otlp v0.19.0/go.mod h1:H7XAot3MsfNsj7EXtrA2q5xSNQ10UqI405h3+duxN4U=
go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
go.uber.org/atomic v1.10.0 h1:9qC72Qh0+3MqyJbAn8YU5xVq1frD8bn3JtD2oXtafVQ=
go.uber.org/atomic v1.10.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
go.uber.org/goleak v1.2.1 h1:NBol2c7O1ZokfZ0LEU9K6Whx/KnwvepVetCUhtKja4A=
go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
go.uber.org/zap v1.19.0/go.mod h1:xg/QME4nWcxGxrpdeYfq7UvYrLh66cuVKdrbD1XF/NI=
go.uber.org/zap v1.24.0 h1:FiJd5l1UOLj0wCgbSE0rwwXHzEdAZS6hiiSnxJN/D60=
go.uber.org/zap v1.24.0/go.mod h1:2kMP+WWQ8aoFoedH3T2sq6iJ2yDWpHbP0f6MQbS9Gkg=
golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
Expand Down Expand Up @@ -926,6 +932,7 @@ golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgw
golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
Expand Down Expand Up @@ -1149,6 +1156,7 @@ gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
Expand Down
22 changes: 19 additions & 3 deletions cluster-autoscaler/main.go
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Expand Up @@ -65,6 +65,9 @@ import (
kube_flag "k8s.io/component-base/cli/flag"
componentbaseconfig "k8s.io/component-base/config"
"k8s.io/component-base/config/options"
"k8s.io/component-base/logs"
logsapi "k8s.io/component-base/logs/api/v1"
_ "k8s.io/component-base/logs/json/register"
"k8s.io/component-base/metrics/legacyregistry"
"k8s.io/klog/v2"
)
Expand Down Expand Up @@ -521,13 +524,26 @@ func run(healthCheck *metrics.HealthCheck, debuggingSnapshotter debuggingsnapsho

func main() {
klog.InitFlags(nil)
featureGate := utilfeature.DefaultMutableFeatureGate
loggingConfig := logsapi.NewLoggingConfiguration()

if err := logsapi.AddFeatureGates(featureGate); err != nil {
klog.Fatalf("Failed to add logging feature flags: %v", err)
}

logsapi.AddFlags(loggingConfig, pflag.CommandLine)
featureGate.AddFlag(pflag.CommandLine)
kube_flag.InitFlags()

if err := logsapi.ValidateAndApply(loggingConfig, featureGate); err != nil {
klog.Fatalf("Failed to validate and apply logging configuration: %v", err)
}

logs.InitLogs()

leaderElection := defaultLeaderElectionConfiguration()
leaderElection.LeaderElect = true

options.BindLeaderElectionFlags(&leaderElection, pflag.CommandLine)
utilfeature.DefaultMutableFeatureGate.AddFlag(pflag.CommandLine)
kube_flag.InitFlags()

healthCheck := metrics.NewHealthCheck(*maxInactivityTimeFlag, *maxFailingTimeFlag)

Expand Down
2 changes: 2 additions & 0 deletions cluster-autoscaler/vendor/github.com/go-logr/zapr/.gitignore
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201 changes: 201 additions & 0 deletions cluster-autoscaler/vendor/github.com/go-logr/zapr/LICENSE
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