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Stop storing stateless kubernetes keystores #21880

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merged 8 commits into from
Oct 19, 2020
Merged

Stop storing stateless kubernetes keystores #21880

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e5abbda
Protect keystore map with mutex
ChrsMark Oct 16, 2020
ef269ab
Add changelog
ChrsMark Oct 16, 2020
21d61b1
lock once on read/write level
ChrsMark Oct 16, 2020
c811fa8
Make use of LoadOrStore
ChrsMark Oct 16, 2020
f0a8cd0
review comments
ChrsMark Oct 19, 2020
8af93be
fix changelog
ChrsMark Oct 19, 2020
3a03732
fix leftover comment
ChrsMark Oct 19, 2020
69a42c6
Update CHANGELOG.next.asciidoc
ChrsMark Oct 19, 2020
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1 change: 1 addition & 0 deletions CHANGELOG.next.asciidoc
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Expand Up @@ -373,6 +373,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
- Fix retrieving resources by ID for the azure module. {pull}21711[21711] {issue}21707[21707]
- Use timestamp from CloudWatch API when creating events. {pull}21498[21498]
- Report the correct windows events for system/filesystem {pull}21758[21758]
- Fix panic in kubernetes autodiscover related to keystores {issue}21843[21843] {pull}21880[21880]

*Packetbeat*

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20 changes: 5 additions & 15 deletions libbeat/common/kubernetes/k8skeystore/kubernetes_keystore.go
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Expand Up @@ -30,14 +30,10 @@ import (
"github.com/elastic/beats/v7/libbeat/logp"
)

type KubernetesKeystores map[string]keystore.Keystore

// KubernetesKeystoresRegistry holds KubernetesKeystores for known namespaces. Once a Keystore for one k8s namespace
// is initialized it will be reused every time it is needed.
// KubernetesKeystoresRegistry implements a Provider for Keystore.
type KubernetesKeystoresRegistry struct {
kubernetesKeystores KubernetesKeystores
logger *logp.Logger
client k8s.Interface
logger *logp.Logger
client k8s.Interface
}

// KubernetesSecretsKeystore allows to retrieve passwords from Kubernetes secrets for a given namespace
Expand All @@ -56,9 +52,8 @@ func Factoryk8s(keystoreNamespace string, ks8client k8s.Interface, logger *logp.
// NewKubernetesKeystoresRegistry initializes a KubernetesKeystoresRegistry
func NewKubernetesKeystoresRegistry(logger *logp.Logger, client k8s.Interface) keystore.Provider {
return &KubernetesKeystoresRegistry{
kubernetesKeystores: KubernetesKeystores{},
logger: logger,
client: client,
logger: logger,
client: client,
}
}

Expand All @@ -75,12 +70,7 @@ func (kr *KubernetesKeystoresRegistry) GetKeystore(event bus.Event) keystore.Key
namespace = ns.(string)
}
if namespace != "" {
// either retrieve already stored keystore or create a new one for the namespace
if storedKeystore, ok := kr.kubernetesKeystores[namespace]; ok {
return storedKeystore
}
k8sKeystore, _ := Factoryk8s(namespace, kr.client, kr.logger)
kr.kubernetesKeystores["namespace"] = k8sKeystore
return k8sKeystore
}
kr.logger.Debugf("Cannot retrieve kubernetes namespace from event: %s", event)
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