Replace ElasticSearch with Loki

NOTICE.md

@@ -25,12 +25,8 @@ The following charts of the [`charts`](charts) directory were seeded based on a
 * [git.k8s.io/charts/stable/nginx-ingress](https://git.k8s.io/charts/stable/nginx-ingress)
 * [git.k8s.io/charts/stable/prometheus](https://git.k8s.io/charts/stable/prometheus)
 * [git.k8s.io/charts/stable/kubernetes-dashboard](https://git.k8s.io/charts/stable/kubernetes-dashboard)
-* [github.com/kubernetes/kubernetes/cluster/addons/fluentd-elasticsearch/es-service.yaml](https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/fluentd-elasticsearch/es-service.yaml)
-* [github.com/kubernetes/kubernetes/cluster/addons/fluentd-elasticsearch/es-statefulset.yaml](https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/fluentd-elasticsearch/es-statefulset.yaml)
-* [github.com/kubernetes/kubernetes/cluster/addons/fluentd-elasticsearch/fluentd-es-configmap.yaml](https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/fluentd-elasticsearch/fluentd-es-configmap.yaml)
-* [github.com/kubernetes/kubernetes/cluster/addons/fluentd-elasticsearch/fluentd-es-ds.yaml](https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/fluentd-elasticsearch/fluentd-es-ds.yaml)
-* [github.com/kubernetes/kubernetes/cluster/addons/fluentd-elasticsearch/kibana-deployment.yaml](https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/fluentd-elasticsearch/kibana-deployment.yaml)
-* [github.com/kubernetes/kubernetes/cluster/addons/fluentd-elasticsearch/kibana-service.yaml](https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/fluentd-elasticsearch/kibana-service.yaml)
+* [github.com/grafana/loki/blob/master/production/helm/loki/templates/statefulset.yaml](https://github.com/grafana/loki/blob/master/production/helm/loki/templates/statefulset.yaml)
+* [github.com/grafana/loki/blob/master/production/helm/loki/templates/service.yaml](https://github.com/grafana/loki/blob/master/production/helm/loki/templates/service.yaml)
 
 ## Container Images
 

charts/images.yaml

@@ -180,38 +180,14 @@ images:
   tag: "3.10.3"
 
 # Logging
-- name: fluentd-es
-  sourceRepository: github.com/gardener/logging
-  repository: eu.gcr.io/gardener-project/gardener/fluentd-es
-  tag: "v0.20.0"
 - name: fluent-bit
-  sourceRepository: github.com/fluent/fluent-bit
-  repository: fluent/fluent-bit
-  tag: "1.0.6"
-- name: elasticsearch-oss
-  sourceRepository: github.com/elastic/elasticsearch-docker
-  repository: docker.elastic.co/elasticsearch/elasticsearch-oss
-  tag: "6.7.1"
-- name: elasticsearch-metrics-exporter
-  sourceRepository: github.com/justwatchcom/elasticsearch_exporter
-  repository: justwatch/elasticsearch_exporter
-  tag: "1.0.2"
-- name: elasticsearch-searchguard-oss
-  sourceRepository: github.com/floragunncom/search-guard
-  repository: floragunncom/sg-elasticsearch
-  tag: "6.7.1-oss-25.0"
-- name: curator-es
   sourceRepository: github.com/gardener/logging
-  repository: eu.gcr.io/gardener-project/gardener/curator-es
-  tag: "v0.20.0"
-- name: kibana-oss
-  sourceRepository: github.com/elastic/kibana-docker
-  repository: docker.elastic.co/kibana/kibana-oss
-  tag: "6.7.1"
-- name: sg-sgadmin
-  sourceRepository: github.com/floragunncom/search-guard
-  repository: floragunncom/sg-sgadmin
-  tag: "6.7.1-25.0"
+  repository: eu.gcr.io/gardener-project/gardener/fluent-bit-to-loki
+  tag: "v0.22.0"
+- name: loki
+  sourceRepository: github.com/grafana/loki
+  repository: grafana/loki
+  tag: "1.5.0"
 
 # VPA
 - name: vpa-admission-controller

charts/seed-bootstrap/aggregate-prometheus-rules-tests/loki.rules.test.yaml

@@ -0,0 +1,24 @@
+rule_files:
+- ../aggregate-prometheus-rules/loki.rules.yaml
+
+evaluation_interval: 30s
+
+tests:
+- interval: 30s
+  input_series:
+  # LokiDown
+  - series: 'up{app="loki"}'
+    values: '0+0x30'
+  alert_rule_test:
+  - eval_time: 15m
+    alertname: LokiDown
+    exp_alerts:
+    - exp_labels:
+        service: loki
+        severity: warning
+        type: seed
+        visibility: operator
+      exp_annotations:
+        description: There are no running loki pods. No logs will be collected.
+        summary: Loki is down
+

charts/seed-bootstrap/aggregate-prometheus-rules/loki.rules.yaml

@@ -0,0 +1,14 @@
+groups:
+- name: loki.rules
+  rules:
+  - alert: LokiDown
+    expr: absent(up{app="loki"} == 1)
+    for: 15m
+    labels:
+      service: loki
+      severity: warning
+      type: seed
+      visibility: operator
+    annotations:
+      description: There are no running loki pods. No logs will be collected.
+      summary: Loki is down