Deploying Promtail on an EKS Cluster using Helm

aws eks update-kubeconfig --region <region> --name <cluster-name>

helm repo add grafana https://grafana.github.io/helm-charts
helm repo update

daemonset:
  # -- Deploys Promtail as a DaemonSet
  enabled: true

service:
  enabled: false
  # -- Labels for the service
  labels: {}
  # -- Annotations for the service
  annotations: {}

secret:
  # -- Labels for the Secret
  labels: {}
  # -- Annotations for the Secret
  annotations: {}

configmap:
  # -- If enabled, promtail config will be created as a ConfigMap instead of a secret
  enabled: false

initContainer: []
  # # -- Specifies whether the init container for setting inotify max user instances is to be enabled
  # - name: init
  #   # -- Docker registry, image and tag for the init container image
  #   image: docker.io/busybox:1.33
  #   # -- Docker image pull policy for the init container image
  #   imagePullPolicy: IfNotPresent
  #   # -- The inotify max user instances to configure
  #   command:
  #     - sh
  #     - -c
  #     - sysctl -w fs.inotify.max_user_instances=128
  #   securityContext:
  #     privileged: true

# -- Annotations for the DaemonSet
annotations: {}

# -- Number of old history to retain to allow rollback (If not set, default Kubernetes value is set to 10)
# revisionHistoryLimit: 1

# -- The update strategy for the DaemonSet
updateStrategy: {}

# -- Pod labels
podLabels: {}

# -- Pod annotations
podAnnotations: {}
#  prometheus.io/scrape: "true"
#  prometheus.io/port: "http-metrics"

# -- The name of the PriorityClass
priorityClassName: null

# -- Liveness probe
livenessProbe: {}

# -- Readiness probe
# @default -- See `values.yaml`
readinessProbe:
  failureThreshold: 5
  httpGet:
    path: "{{ printf `%s/ready` .Values.httpPathPrefix }}"
    port: http-metrics
  initialDelaySeconds: 10
  periodSeconds: 10
  successThreshold: 1
  timeoutSeconds: 1

# -- Resource requests and limits
resources: {}
#  limits:
#    cpu: 200m
#    memory: 128Mi
#  requests:
#    cpu: 100m
#    memory: 128Mi

# -- The security context for pods
podSecurityContext:
  runAsUser: 0
  runAsGroup: 0

# -- The security context for containers
containerSecurityContext:
  readOnlyRootFilesystem: true
  capabilities:
    drop:
      - ALL
  allowPrivilegeEscalation: false

rbac:
  # -- Specifies whether RBAC resources are to be created
  create: true
  # -- Specifies whether a PodSecurityPolicy is to be created
  pspEnabled: false

# -- The name of the Namespace to deploy
# If not set, `.Release.Namespace` is used
namespace: loki

serviceAccount:
  # -- Specifies whether a ServiceAccount should be created
  create: true
  # -- The name of the ServiceAccount to use.
  # If not set and `create` is true, a name is generated using the fullname template
  name: null
  # -- Image pull secrets for the service account
  imagePullSecrets: []
  # -- Annotations for the service account
  annotations: {}

# -- Node selector for pods
nodeSelector: {}

# -- Affinity configuration for pods
affinity: {}

# -- Tolerations for pods. By default, pods will be scheduled on master/control-plane nodes.
tolerations:
  - key: node-role.kubernetes.io/master
    operator: Exists
    effect: NoSchedule
  - key: node-role.kubernetes.io/control-plane
    operator: Exists
    effect: NoSchedule

# -- Default volumes that are mounted into pods. In most cases, these should not be changed.
# Use `extraVolumes`/`extraVolumeMounts` for additional custom volumes.
# @default -- See `values.yaml`
defaultVolumes:
  - name: run
    hostPath:
      path: /run/promtail
  - name: containers
    hostPath:
      path: /var/lib/docker/containers
  - name: pods
    hostPath:
      path: /var/log/pods

# -- Default volume mounts. Corresponds to `volumes`.
# @default -- See `values.yaml`
defaultVolumeMounts:
  - name: run
    mountPath: /run/promtail
  - name: containers
    mountPath: /var/lib/docker/containers
    readOnly: true
  - name: pods
    mountPath: /var/log/pods
    readOnly: true

# Extra volumes to be added in addition to those specified under `defaultVolumes`.
extraVolumes: []

# Extra volume mounts together. Corresponds to `extraVolumes`.
extraVolumeMounts: []

# Extra args for the Promtail container.
extraArgs: []
# -- Example:
# -- extraArgs:
# --   - -client.external-labels=hostname=$(HOSTNAME)

# -- Extra environment variables. Set up tracing enviroment variables here if .Values.config.enableTracing is true.
# Tracing currently only support configure via environment variables. See:
# https://grafana.com/docs/loki/latest/clients/promtail/configuration/#tracing_config
# https://www.jaegertracing.io/docs/1.16/client-features/
extraEnv: []

# -- Extra environment variables from secrets or configmaps
extraEnvFrom: []

# -- Configure enableServiceLinks in pod
enableServiceLinks: true

# -- Configure additional ports and services. For each configured port, a corresponding service is created.
# See values.yaml for details
extraPorts: {}
#  syslog:
#    name: tcp-syslog
#    annotations: {}
#    labels: {}
#    containerPort: 1514
#    protocol: TCP
#    service:
#      type: ClusterIP
#      clusterIP: null
#      port: 1514
#      externalIPs: []
#      nodePort: null
#      loadBalancerIP: null
#      loadBalancerSourceRanges: []
#      externalTrafficPolicy: null
#    ingress:
#      # For Kubernetes >= 1.18 you should specify the ingress-controller via the field ingressClassName
#      # See https://kubernetes.io/blog/2020/04/02/improvements-to-the-ingress-api-in-kubernetes-1.18/#specifying-the-class-of-an-ingress
#      # ingressClassName: nginx
#      # Values can be templated
#      annotations: {}
#        # kubernetes.io/ingress.class: nginx
#        # kubernetes.io/tls-acme: "true"
#      paths: "/"
#      hosts:
#        - chart-example.local
#
#      tls: []
#      #  - secretName: chart-example-tls
#      #    hosts:
#      #      - chart-example.local

# -- Section for crafting Promtails config file. The only directly relevant value is `config.file`
# which is a templated string that references the other values and snippets below this key.
# @default -- See `values.yaml`
config:
  # -- Enable Promtail config from Helm chart
  # Set `configmap.enabled: true` and this to `false` to manage your own Promtail config
  # See default config in `values.yaml`
  enabled: true
  # -- The log level of the Promtail server
  # Must be reference in `config.file` to configure `server.log_level`
  # See default config in `values.yaml`
  logLevel: info
  # -- The log format of the Promtail server
  # Must be reference in `config.file` to configure `server.log_format`
  # Valid formats: `logfmt, json`
  # See default config in `values.yaml`
  logFormat: logfmt
  # -- The port of the Promtail server
  # Must be reference in `config.file` to configure `server.http_listen_port`
  # See default config in `values.yaml`
  serverPort: 3101
  # -- The config of clients of the Promtail server
  # Must be reference in `config.file` to configure `clients`
  # @default -- See `values.yaml`
  clients:
    - url: http://loki-gateway/loki/api/v1/push
  # -- Configures where Promtail will save it's positions file, to resume reading after restarts.
  # Must be referenced in `config.file` to configure `positions`
  positions:
    filename: /run/promtail/positions.yaml
  # -- The config to enable tracing
  enableTracing: false

  # -- Config file contents for Promtail.
  # Must be configured as string.
  # It is templated so it can be assembled from reusable snippets in order to avoid redundancy.
  # @default -- See `values.yaml`
  file: |
    server:
      log_level: {{ .Values.config.logLevel }}
      log_format: {{ .Values.config.logFormat }}
      http_listen_port: {{ .Values.config.serverPort }}
      {{- with .Values.httpPathPrefix }}
      http_path_prefix: {{ . }}
      {{- end }}
      {{- tpl .Values.config.snippets.extraServerConfigs . | nindent 2 }}

    clients:
      {{- tpl (toYaml .Values.config.clients) . | nindent 2 }}

    positions:
      {{- tpl (toYaml .Values.config.positions) . | nindent 2 }}

    scrape_configs:
      {{- tpl .Values.config.snippets.scrapeConfigs . | nindent 2 }}
      {{- tpl .Values.config.snippets.extraScrapeConfigs . | nindent 2 }}

    limits_config:
      {{- tpl .Values.config.snippets.extraLimitsConfig . | nindent 2 }}

    tracing:
      enabled: {{ .Values.config.enableTracing }}    

# -- Base path to server all API routes fro
httpPathPrefix: ""

# -- Extra K8s manifests to deploy
extraObjects: []
  # - apiVersion: "kubernetes-client.io/v1"
  #   kind: ExternalSecret
  #   metadata:
  #     name: promtail-secrets
  #   spec:
  #     backendType: gcpSecretsManager
  #     data:
  #       - key: promtail-oauth2-creds
  #         name: client_secret

helm upgrade --values promtail-values.yaml --install promtail grafana/promtail -n loki

kubectl get pods -l app.kubernetes.io/name=promtail -n loki

kubectl logs promtail-58xrs -n loki