init

Chart.yaml

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+apiVersion: "v1"
+name: loki-stack
+version: 2.6.1
+appVersion: v2.1.0
+kubeVersion: "^1.10.0-0"
+description: "Loki: like Prometheus, but for logs."
+home: https://grafana.com/loki
+icon: https://raw.githubusercontent.com/grafana/loki/master/docs/sources/logo.png
+sources:
+- https://github.com/grafana/loki
+maintainers:
+- name: Loki Maintainers
+  email: lokiproject@googlegroups.com
+engine: gotpl

README.md

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+
+# prom-loki
+

requirements.lock

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+dependencies:
+- name: loki
+  repository: https://grafana.github.io/helm-charts
+  version: 2.10.1
+- name: promtail
+  repository: https://grafana.github.io/helm-charts
+  version: 2.2.0
+- name: fluent-bit
+  repository: https://grafana.github.io/helm-charts
+  version: 2.3.0
+- name: grafana
+  repository: https://grafana.github.io/helm-charts
+  version: 6.21.8
+- name: prometheus
+  repository: https://prometheus-community.github.io/helm-charts
+  version: 15.0.4
+- name: filebeat
+  repository: https://helm.elastic.co
+  version: 7.17.1
+- name: logstash
+  repository: https://helm.elastic.co
+  version: 7.8.1
+digest: sha256:18e9f3020b565448367602142683ed984b872ec4f9e4eb568f193341265ad550
+generated: "2022-03-09T19:18:00.699336741-05:00"

requirements.yaml

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+dependencies:
+- name: "loki"
+  condition: loki.enabled
+  repository: "https://grafana.github.io/helm-charts"
+  version: "^2.3.0"
+- name: "promtail"
+  condition: promtail.enabled
+  repository: "https://grafana.github.io/helm-charts"
+  version: "^2.2.0"
+- name: "fluent-bit"
+  condition: fluent-bit.enabled
+  repository: "https://grafana.github.io/helm-charts"
+  version: "^2.2.0"
+- name: "grafana"
+  condition: grafana.enabled
+  version: "~6.21.2"
+  repository:  "https://grafana.github.io/helm-charts"
+- name: "prometheus"
+  condition: prometheus.enabled
+  version: "~15.0.1"
+  repository:  "https://prometheus-community.github.io/helm-charts"
+- name: "filebeat"
+  condition: filebeat.enabled
+  version: "~7.17.0"
+  repository:  "https://helm.elastic.co"
+- name: "logstash"
+  condition: logstash.enabled
+  version: "~7.8.0"
+  repository:  "https://helm.elastic.co"

templates/NOTES.txt

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+The Loki stack has been deployed to your cluster. Loki can now be added as a datasource in Grafana.
+
+See http://docs.grafana.org/features/datasources/loki/ for more detail.

templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "loki-stack.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "loki-stack.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "loki-stack.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Override the naming defined by the prometheus chart.
+Added as a fix for https://github.com/grafana/loki/issues/1169
+*/}}
+{{- define "prometheus.fullname" -}}
+{{- printf "%s-%s" .Release.Name "prometheus-server" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+The service name to connect to Loki. Defaults to the same logic as "loki.fullname"
+*/}}
+{{- define "loki.serviceName" -}}
+{{- if .Values.loki.serviceName -}}
+{{- .Values.loki.serviceName -}}
+{{- else if .Values.loki.fullnameOverride -}}
+{{- .Values.loki.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default "loki" .Values.loki.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}

templates/datasources.yaml

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+{{- if .Values.grafana.sidecar.datasources.enabled }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "loki-stack.fullname" . }}
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app: {{ template "loki-stack.name" . }}
+    chart: {{ template "loki-stack.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+    grafana_datasource: "1"
+data:
+  loki-stack-datasource.yaml: |-
+    apiVersion: 1
+    datasources:
+{{- if .Values.loki.enabled }}
+    - name: Loki
+      type: loki
+      access: proxy
+      url: http://{{(include "loki.serviceName" .)}}:{{ .Values.loki.service.port }}
+      version: 1
+{{- end }}
+{{- if .Values.prometheus.enabled }}
+    - name: Prometheus
+      type: prometheus
+      access: proxy
+      url: http://{{ include "prometheus.fullname" .}}:{{ .Values.prometheus.server.service.servicePort }}{{ .Values.prometheus.server.prefixURL }}
+      version: 1
+{{- end }}
+{{- end }}

templates/tests/loki-test-configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "loki-stack.fullname" . }}-test
+  labels:
+    app: {{ template "loki-stack.name" . }}
+    chart: {{ template "loki-stack.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+data:
+  test.sh: |
+    #!/usr/bin/env bash
+
+    LOKI_URI="http://${LOKI_SERVICE}:${LOKI_PORT}"
+
+    function setup() {
+      apk add -u curl jq
+      until (curl -s ${LOKI_URI}/api/prom/label/app/values | jq -e '.values[] | select(. == "loki")'); do
+        sleep 1
+      done
+    }
+
+    @test "Has labels" {
+      curl -s ${LOKI_URI}/api/prom/label | \
+      jq -e '.values[] | select(. == "app")'
+    }
+
+    @test "Query log entry" {
+      curl -sG ${LOKI_URI}/api/prom/query?limit=10 --data-urlencode 'query={app="loki"}' | \
+      jq -e '.streams[].entries | length >= 1'
+    }
+
+    @test "Push log entry legacy" {
+      local timestamp=$(date -Iseconds -u | sed 's/UTC/.000000000+00:00/')
+      local data=$(jq -n --arg timestamp "${timestamp}" '{"streams": [{"labels": "{app=\"loki-test\"}", "entries": [{"ts": $timestamp, "line": "foobar"}]}]}')
+
+      curl -s -X POST -H "Content-Type: application/json" ${LOKI_URI}/api/prom/push -d "${data}"
+
+      curl -sG ${LOKI_URI}/api/prom/query?limit=1 --data-urlencode 'query={app="loki-test"}' | \
+      jq -e '.streams[].entries[].line == "foobar"'
+    }
+
+    @test "Push log entry" {
+      local timestamp=$(date +%s000000000)
+      local data=$(jq -n --arg timestamp "${timestamp}" '{"streams": [{"stream": {"app": "loki-test"}, "values": [[$timestamp, "foobar"]]}]}')
+
+      curl -s -X POST -H "Content-Type: application/json" ${LOKI_URI}/loki/api/v1/push -d "${data}"
+
+      curl -sG ${LOKI_URI}/api/prom/query?limit=1 --data-urlencode 'query={app="loki-test"}' | \
+      jq -e '.streams[].entries[].line == "foobar"'
+    }
+

templates/tests/loki-test-pod.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  annotations:
+    "helm.sh/hook": test-success
+  labels:
+    app: {{ template "loki-stack.name" . }}
+    chart: {{ template "loki-stack.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+  name: {{ template "loki-stack.fullname" . }}-test
+spec:
+  containers:
+  - name: test
+    image: bats/bats:v1.1.0
+    args:
+    - /var/lib/loki/test.sh
+    env:
+    - name: LOKI_SERVICE
+      value: {{ template "loki.serviceName" . }}
+    - name: LOKI_PORT
+      value: "{{ .Values.loki.service.port }}"
+    volumeMounts:
+    - name: tests
+      mountPath: /var/lib/loki
+  restartPolicy: Never
+  volumes:
+  - name: tests
+    configMap:
+      name: {{ template "loki-stack.fullname" . }}-test

values.yaml

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+
+loki:
+  enabled: true
+
+grafana:
+  enabled: true
+
+  # TODO change this
+  adminPassword: prom-operator
+
+  ingress:
+    enabled: true
+    ingressClassName: nginx
+
+    path: /
+    pathType: Prefix
+    hosts:
+      - grafana.ing
+ 
+prometheus:
+  enabled: true
+
+filebeat:
+  enabled: true
+  filebeatConfig:
+    filebeat.yml: |
+      logging.level: debug
+      filebeat.inputs:
+      - type: container
+        paths:
+          - /var/log/containers/*.log
+        processors:
+        - add_kubernetes_metadata:
+            host: ${NODE_NAME}
+            matchers:
+            - logs_path:
+                logs_path: "/var/log/containers/"
+      output.logstash:
+        hosts: ["logstash-loki:5044"]
+ 
+logstash:
+  enabled: true
+  image: grafana/logstash-output-loki
+  imageTag: 1.0.1
+  filters:
+    main: |-
+      filter {
+        if [kubernetes] {
+          mutate {
+            add_field => {
+              "container_name" => "%{[kubernetes][container][name]}"
+              "namespace" => "%{[kubernetes][namespace]}"
+              "pod" => "%{[kubernetes][pod][name]}"
+            }
+            replace => { "host" => "%{[kubernetes][node][name]}"}
+          }
+        }
+        mutate {
+          remove_field => ["tags"]
+        }
+      }
+  outputs:
+    main: |-
+      output {
+        loki {
+          url => "http://loki:3100/loki/api/v1/push"
+          username => "test"
+          password => "test"
+        }
+        # stdout { codec => rubydebug }
+      }
+ 
+promtail:
+  enabled: false
+
+fluent-bit:
+  enabled: false
+