To upgrade the Loki Package

Check the upstream changelog and the helm chart upgrade notes.

Upgrading

Find the latest version of the loki image that matches the latest version in IronBank that Renovate has identified from here: https://github.com/grafana/loki/tree/helm-loki-3.2.0/production/helm/loki

Run a KPT update against the main chart folder:

kpt pkg update chart@helm-loki-${chart.version} --strategy alpha-git-patch

Restore all BigBang added templates and tests:

git checkout chart/templates/bigbang/
git checkout chart/deps/loki
git checkout chart/deps/minio
git checkout chart/tests/
git checkout chart/dashboards
git checkout chart/templates/tests

Update dependencies

Typically, the --strategy=force-delete-replace is useful to “heavy handidly” bring in dep changes which may need to be reviewed. LATEST_BB_PACKAGE_TAG_VERSION

cd chart/deps
kpt pkg update minio@${LATEST_BB_PACKAGE_TAG_VERSION} --strategy=force-delete-replace
cd ../../

Update dependencies in chart.yml

Ensure minio version in chart.yml matches the latest tag version.

Update binaries

Pull assets and commit the binaries as well as the Chart.lock file that was generated.

export HELM_EXPERIMENTAL_OCI=1
helm dependency update ./chart

Update main chart

chart/Chart.yaml

• update loki version and appVersion
• Ensure Big Bang version suffix is appended to chart version
• Ensure minio, gluon, and loki dependencies are present and up to date

version: $VERSION-bb.0
dependencies:
  - name: minio-instance
    alias: minio
    version: $MINIO_VERSION
    repository: file://./deps/minio
    condition: minio.enabled
  - name: grafana-agent-operator
    alias: grafana-agent-operator
    version: $GRAFANA_VERSION
    repository: https://grafana.github.io/helm-charts
    condition: monitoring.selfMonitoring.grafanaAgent.installOperator
  - name: gluon
    version: $GLUON_VERSION
    repository: "oci://registry.dso.mil/platform-one/big-bang/apps/library-charts/gluon"
annotations:
  bigbang.dev/applicationVersions: |
    - Loki: $LOKI_APP_VERSION

chart/values.yaml

• Verify renovate correctly tag for the new version.

chart/tests/*

• add cypress testing configuration and/or tests if necessary.

Modifications made to upstream

This is a high-level list of modifications that Big Bang has made to the upstream helm chart. You can use this as as cross-check to make sure that no modifications were lost during the upgrade process.

chart/values.yaml

• line 16, Ensure nameOverride is set to logging-loki nameOverride: logging-loki

• line 19, Ensure fullnameOverride is set to logging-loki fullnameOverride: logging-loki

• line 22, Ensure private-registry IPS is present:

imagePullSecrets:
  - name: private-registry

• line 25, update the kubectl image to pull from registry1

  kubectlImage:
    # -- The Docker registry
    registry: registry1.dso.mil/ironbank
    # -- Docker image repository
    repository: opensource/kubernetes/kubectl
    # -- Overrides the image tag whose default is the chart's appVersion
    tag: v1.25.2

line 43, Ensure loki.image section points to registry1 image and correct tag

  image:
    # -- The Docker registry
    registry: registry1.dso.mil
    # -- Docker image repository
    repository: ironbank/opensource/grafana/loki
    # -- Overrides the image tag whose default is the chart's appVersion
    tag: X.X.X

• line 119, Ensure 136 config is present

    ingester:
      chunk_target_size: 196608
      flush_check_period: 5s
      flush_op_timeout: 100m
      lifecycler:
        ring:
          kvstore:
            store: memberlist
          replication_factor: 1

• line 213, Ensure by default auth is disabled

  auth_enabled: false

• line 238, Ensure storage.bucketNames points to loki, loki & loki-admin

  storage:
    bucketNames:
      chunks: loki
      ruler: loki
      admin: loki-admin

• line 295, Ensure storage_config.boltdb_shipper configuration is present

  storage_config:
    boltdb_shipper:
      active_index_directory: /var/loki/boltdb-shipper-active
      cache_location: /var/loki/boltdb-shipper-cache
      cache_ttl: 24h
      shared_store: s3

• line 370 , Ensure enterprise.image is pointed to registry1 image

  image:
    # -- The Docker registry
    registry: registry1.dso.mil
    # -- Docker image repository
    repository: ironbank/grafana/grafana-enterprise-logs
    # -- Overrides the image tag whose default is the chart's appVersion
    tag: vX.X.X

• line 425, Ensure provisioner.enabled is set to false

  provisioner:
    # -- Whether the job should be part of the deployment
    enabled: false

• line 517, Ensure all monitoring sub-components are set to enabled: false Including the added monitoring.enabled value

monitoring:
  # -- Enable BigBang integration of Monitoring components
  enabled: false

• line 621 ensure monitoring.selfMonitoring.grafanaAgent.installOperator is set to false

• line 652, Ensure lokiCanary.enabled is set to false

    lokiCanary:
      enabled: false

• line 717, write pod resources set

  resources:
    limits:
      cpu: 300m
      memory: 2Gi
    requests:
      cpu: 300m
      memory: 2Gi

• line 754, ensure at the bottom of the write: block, there is a podDisruptionBudget section

  ## -- Application controller Pod Disruption Budget Configuration
  ## Ref: https://kubernetes.io/docs/tasks/run-application/configure-pdb/
  podDisruptionBudget:
    # -- Number of pods that are available after eviction as number or percentage (eg.: 50%)
    # @default -- `""` (defaults to 0 if not specified)
    minAvailable: ""
    # -- Number of pods that are unavailable after eviction as number or percentage (eg.: 50%).
    ## Has higher precedence over `controller.pdb.minAvailable`
    maxUnavailable: "1"

• line 850, legacyReadTarget set to true to give users time to migrate 2/7/23

  legacyReadTarget: true

• line 864, read pod resources set

  resources:
    limits:
      cpu: 300m
      memory: 2Gi
    requests:
      cpu: 300m
      memory: 2Gi

• line 908, ensure at the bottom of the read: block, there is a podDisruptionBudget section

  ## -- Application controller Pod Disruption Budget Configuration
  ## Ref: https://kubernetes.io/docs/tasks/run-application/configure-pdb/
  podDisruptionBudget:
    # -- Number of pods that are available after eviction as number or percentage (eg.: 50%)
    # @default -- `""` (defaults to 0 if not specified)
    minAvailable: ""
    # -- Number of pods that are unavailable after eviction as number or percentage (eg.: 50%).
    ## Has higher precedence over `controller.pdb.minAvailable`
    maxUnavailable: "1"

• line 983, ensure at the bottom of the backend: block, there is a podDisruptionBudget section

  ## -- Application controller Pod Disruption Budget Configuration
  ## Ref: https://kubernetes.io/docs/tasks/run-application/configure-pdb/
  podDisruptionBudget:
    # -- Number of pods that are available after eviction as number or percentage (eg.: 50%)
    # @default -- `""` (defaults to 0 if not specified)
    minAvailable: ""
    # -- Number of pods that are unavailable after eviction as number or percentage (eg.: 50%).
    ## Has higher precedence over `controller.pdb.minAvailable`
    maxUnavailable: "1"

• line 1011, set resource requests and limits for singleBinary

  resources:
    limits:
      cpu: 100m
      memory: 256Mi
    requests:
      cpu: 100m
      memory: 256Mi

• line 1094 gateway.enabled set to false by default

• line 1114, Ensure gateway.image is pointed to registry1 equivalent

  image:
    # -- The Docker registry for the gateway image
    registry: registry1.dso.mil
    # -- The gateway image repository
    repository: ironbank/opensource/nginx/nginx
    # -- The gateway image tag
    tag: X.X.X

• line 1271, ensure at the bottom of the gateway: block, there is a podDisruptionBudget section

  ## -- Application controller Pod Disruption Budget Configuration
  ## Ref: https://kubernetes.io/docs/tasks/run-application/configure-pdb/
  podDisruptionBudget:
    # -- Number of pods that are available after eviction as number or percentage (eg.: 50%)
    # @default -- `""` (defaults to 0 if not specified)
    minAvailable: ""
    # -- Number of pods that are unavailable after eviction as number or percentage (eg.: 50%).
    ## Has higher precedence over `controller.pdb.minAvailable`
    maxUnavailable: "1"

• line 1356 remove minio block added by upstream

  replicas: 1
  # Minio requires 2 to 16 drives for erasure code (drivesPerNode * replicas)
  # https://docs.min.io/docs/minio-erasure-code-quickstart-guide
  # Since we only have 1 replica, that means 2 drives must be used.
  drivesPerNode: 2
  rootUser: enterprise-logs
  rootPassword: supersecret
  buckets:
    - name: chunks
      policy: none
      purge: false
    - name: ruler
      policy: none
      purge: false
    - name: admin
      policy: none
      purge: false
  persistence:
    size: 5Gi
  resources:
    requests:
      cpu: 100m
      memory: 128Mi

• line 1380 or EOF. Move extraObjects configmap block up under loki. Above Minio.

# Create extra manifests via values. Would be passed through `tpl` for templating
extraObjects: []

• line 1312, ensure the following BB values are all set under minio key:

minio:
  # -- Enable minio instance support, must have minio-operator installed
  enabled: false
  # Override the minio service name for easier connection setup
  service:
    nameOverride: "minio.logging.svc.cluster.local"
  # -- Minio root credentials
  secrets:
    name: "loki-objstore-creds"
    accessKey: "minio"
    secretKey: "minio123" # default key, change this!
  tenant:
    # -- Buckets to be provisioned to for tenant
    buckets:
      - name: loki
      - name: loki-admin
    # -- Users to to be provisioned to for tenant
    users:
      - name: minio-user
    # -- User credentials to create for above user. Otherwise password is randomly generated.
    # This auth is not required to be set or reclaimed for minio use with Loki
    defaultUserCredentials:
      username: "minio-user"
      password: ""
    ## Specification for MinIO Pool(s) in this Tenant.
    pools:
      - servers: 1
        volumesPerServer: 4
        size: 750Mi
        securityContext:
          runAsUser: 1001
          runAsGroup: 1001
          fsGroup: 1001
    metrics:
      enabled: false
      port: 9000
      memory: 128M

• End of file add/verify the following blocks:

domain: bigbang.dev

istio:
  enabled: false
  mtls:
    # STRICT = Allow only mutual TLS traffic
    # PERMISSIVE = Allow both plain text and mutual TLS traffic
    mode: STRICT

networkPolicies:
  enabled: false
  # -- Control Plane CIDR to allow init job communication to the Kubernetes API.
  # Use `kubectl get endpoints kubernetes` to get the CIDR range needed for your cluster
  controlPlaneCidr: 0.0.0.0/0

bbtests:
  enabled: false
  cypress:
    artifacts: true
    envs:
      cypress_check_datasource: 'false'
      cypress_grafana_url: 'http://monitoring-grafana.monitoring.svc.cluster.local'
  scripts:
    image: registry1.dso.mil/ironbank/big-bang/base:2.0.0
    envs:
      LOKI_URL: 'http://{{ .Values.fullnameOverride }}.{{ .Release.Namespace }}.svc:3100'
      LOKI_VERSION: '{{ .Values.loki.image.tag }}'

chart/templates/tokengen/job-tokengen.yaml

• At the top of the file, at the start of the templates under the conditionals at the very top, add the following NetworkPolicy resources:

{{- if .Values.networkPolicies.enabled }}
{{- if .Values.minio.enabled }}
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: tokengen-ingress-minio
  namespace: {{ .Release.Namespace }}
  annotations:
    "helm.sh/hook": post-install
    "helm.sh/hook-weight": "-10"
    "helm.sh/hook-delete-policy": hook-succeeded,hook-failed,before-hook-creation
spec:
  podSelector:
    matchLabels:
      app: minio
      app.kubernetes.io/instance: {{ .Release.Name }}
  ingress:
    - from:
      - podSelector:
          matchLabels:
            {{- include "enterprise-logs.tokengenLabels" . | nindent 14 }}
            {{- with .Values.enterprise.tokengen.labels }}
            {{- toYaml . | nindent 14 }}
            {{- end }}
      ports:
        - port: 9000
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: tokengen-egress-minio
  namespace: {{ .Release.Namespace }}
  annotations:
    "helm.sh/hook": post-install
    "helm.sh/hook-weight": "-10"
    "helm.sh/hook-delete-policy": hook-succeeded,hook-failed,before-hook-creation
spec:
  podSelector:
    matchLabels:
      app: minio
      app.kubernetes.io/instance: {{ .Release.Name }}
  egress:
    - to:
      - podSelector:
          matchLabels:
            {{- include "enterprise-logs.tokengenLabels" . | nindent 14 }}
            {{- with .Values.enterprise.tokengen.labels }}
            {{- toYaml . | nindent 14 }}
            {{- end }}
      ports:
        - port: 9000
{{- end }}
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: api-egress-tokengen-job
  namespace: {{ .Release.Namespace }}
  annotations:
    "helm.sh/hook": post-install
    "helm.sh/hook-weight": "-10"
    "helm.sh/hook-delete-policy": hook-succeeded,hook-failed,before-hook-creation
spec:
  egress:
  - to:
    - ipBlock:
        cidr: {{ .Values.networkPolicies.controlPlaneCidr }}
        {{- if eq .Values.networkPolicies.controlPlaneCidr "0.0.0.0/0" }}
        # ONLY Block requests to AWS metadata IP
        except:
        - 169.254.169.254/32
        {{- end }}
  podSelector:
    matchLabels:
      {{- include "enterprise-logs.tokengenLabels" . | nindent 6 }}
      {{- with .Values.enterprise.tokengen.labels }}
      {{- toYaml . | nindent 6 }}
      {{- end }}
  policyTypes:
  - Egress
{{- end }}
---

chart/templates/_helpers.tpl

• On line 5 for the $default function, remove the ternary function and ensure the definition looks just like:

{{- $default := "loki" }

• line 156 ensure the following block for minio looks like:

{{- if .Values.minio.enabled -}}
s3:
  endpoint: {{ $.Values.minio.service.nameOverride }}
  bucketnames: {{ $.Values.loki.storage.bucketNames.chunks }}
  secret_access_key: {{ $.Values.minio.secrets.secretKey }}
  access_key_id: {{ $.Values.minio.secrets.accessKey }}
  s3forcepathstyle: true
  insecure: true

chart/templates/backend/poddisruptionbudget-backend.yaml

• Ensure that there is not hard-coded spec for the PDB template

  {{- with .Values.backend.podDisruptionBudget.maxUnavailable }}
  maxUnavailable: {{ . }}
  {{- else }}
  minAvailable: {{ .Values.backend.podDisruptionBudget.minAvailable | default 0 }}
  {{- end }}

chart/templates/gateway/poddisruptionbudget-gateway.yaml

• Ensure that there is not hard-coded spec for the PDB template

  {{- with .Values.gateway.podDisruptionBudget.maxUnavailable }}
  maxUnavailable: {{ . }}
  {{- else }}
  minAvailable: {{ .Values.gateway.podDisruptionBudget.minAvailable | default 0 }}
  {{- end }}

chart/templates/read/poddisruptionbudget-read.yaml

• Ensure that there is not hard-coded spec for the PDB template

  {{- with .Values.read.podDisruptionBudget.maxUnavailable }}
  maxUnavailable: {{ . }}
  {{- else }}
  minAvailable: {{ .Values.read.podDisruptionBudget.minAvailable | default 0 }}
  {{- end }}

chart/templates/write/poddisruptionbudget-write.yaml

• Ensure that there is no hard-coded spec for the PDB template

  {{- with .Values.write.podDisruptionBudget.maxUnavailable }}
  maxUnavailable: {{ . }}
  {{- else }}
  minAvailable: {{ .Values.write.podDisruptionBudget.minAvailable | default 0 }}
  {{- end }}

chart/src/dashboards/

• cd into this directory and run the following command to update the logic so the Release name is captured:

sed -i 's/(loki|enterprise-logs)/logging-loki/g' \*.json

Testing new Loki Version

Deploy Loki Scalable as a part of BigBang

helm upgrade \
  --install bigbang ./bigbang/chart \
  --create-namespace \
  --namespace bigbang \
  --values ./bigbang/chart/values.yaml \
  --values ./bigbang/chart/ingress-certs.yaml \
  --values ./overrides/loki.yaml \
  --set gatekeeper.enabled=false \
  --set clusterAuditor.enabled=false \
  --set twistlock.enabled=false \
  --set loki.enabled=true \
  --set promtail.enabled=true \
  --set logging.enabled=false \
  --set eckoperator.enabled=false \
  --set fluentbit.enabled=true \
  --set jaeger.enabled=false \
  --set tempo.enabled=true \
  --set addons.minioOperator.enabled=true

overrides/loki.yaml

loki:
  git:
    tag: ""
    branch: "my-branch-name-goes-here"
  enabled: true
  strategy: scalable

• Visit https://grafana.bigbang.dev and login
• Navigate to configuration -> Data Sources -> Loki and then click Save & Test to ensure Data Source changes can be saved successfully.
• Search dashboards for Loki Dashboard Quick Search and confirm log data is being populated/no error messages.

Deploy Loki Monolith as a part of BigBang

helm upgrade \
  --install bigbang ./bigbang/chart \
  --create-namespace \
  --namespace bigbang \
  --values ./bigbang/chart/values.yaml \
  --values ./bigbang/chart/ingress-certs.yaml \
  --values ./overrides/loki.yaml \
  --set gatekeeper.enabled=false \
  --set clusterAuditor.enabled=false \
  --set twistlock.enabled=false \
  --set loki.enabled=true \
  --set promtail.enabled=true \
  --set logging.enabled=false \
  --set eckoperator.enabled=false \
  --set fluentbit.enabled=true \
  --set jaeger.enabled=false \
  --set tempo.enabled=true

overrides/loki.yaml

loki:
  git:
    tag: ""
    branch: "my-branch-name-goes-here"
  enabled: true

• Visit https://grafana.bigbang.dev and login
• Navigate to configuration -> Data Sources -> Loki and then click Save & Test to ensure Data Source changes can be saved successfully.
• Search dashboards for Loki Dashboard Quick Search and confirm log data is being populated/no error messages.

---

Last update: 2023-02-24 by Ryan Garcia