oncallの最速実行

そもそも何でテストしようと思ったのか

・弊社はエラー通知に Sentryを利用しているのですが、だんだんとサービスが増えてきてメール件数が増える⇨メール通知だと"どれが重大なエラー"で"どこで起きているのか"直感的に判断しにくい！状況になってきた
⇨もうちょい通知管理しやすい物ない？
って所が起点です。

1.Grafana Cloudを使う

~~元も子もない~~
cloud版を利用している場合はこちらの方が早いです。
~~Cloud版の方が実はOncall Sentryプラグインが最初から使えて楽だったりする~~

2.OSS版をhelmで建てる（本題）

Grafana OncallにはOSS版があります。そちらを使ってやろうというお話です。

今回はhelmで1撃で建てます。

values.yaml

# Values for configuring the deployment of Grafana OnCall

# Set the domain name Grafana OnCall will be installed on.
# If you want to install grafana as a part of this release make sure to configure grafana.grafana.ini.server.domain too
base_url: <oncallのURL>
base_url_protocol: https

## Optionally specify an array of imagePullSecrets.
## Secrets must be manually created in the namespace.
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
## e.g:
## imagePullSecrets:
##   - name: myRegistryKeySecretName
imagePullSecrets: []

image:
  # Grafana OnCall docker image repository
  repository: grafana/oncall
  tag:
  pullPolicy: Always

# Whether to create additional service for external connections
# ClusterIP service is always created
service:
  enabled: true
  type: NodePort
  port: 8080
  nodePort: 30093
  annotations: {}

# Engine pods configuration
engine:
  replicaCount: 1
  resources:
    {}
    # limits:
    #   cpu: 100m
    #   memory: 128Mi
    # requests:
    #   cpu: 100m
    #   memory: 128Mi

  # Labels for engine pods
  podLabels: {}

  ## Deployment update strategy
  ## ref: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#strategy
  updateStrategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 0
    type: RollingUpdate

  ## Affinity for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
  affinity: {}

  ## Node labels for pod assignment
  ## ref: https://kubernetes.io/docs/user-guide/node-selection/
  nodeSelector: {}

  ## Tolerations for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
  tolerations: []

  ## Topology spread constraints for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/
  topologySpreadConstraints: []

  ## Priority class for the pods
  ## ref: https://kubernetes.io/docs/concepts/scheduling-eviction/pod-priority-preemption/
  priorityClassName: ""

  # Extra containers which runs as sidecar
  extraContainers: ""
  # extraContainers: |
  # - name: cloud-sql-proxy
  #   image: gcr.io/cloud-sql-connectors/cloud-sql-proxy:2.1.2
  #   args:
  #     - --private-ip
  #     - --port=5432
  #     - example:europe-west3:grafana-oncall-db

  # Extra volume mounts for the main app container
  extraVolumeMounts: []
  # - mountPath: /mnt/postgres-tls
  #   name: postgres-tls
  # - mountPath: /mnt/redis-tls
  #   name: redis-tls

  # Extra volumes for the pod
  extraVolumes: []
  # - name: postgres-tls
  #   configMap:
  #     name: my-postgres-tls
  #     defaultMode: 0640
  # - name: redis-tls
  #   configMap:
  #     name: my-redis-tls
  #     defaultMode: 0640

detached_integrations_service:
  enabled: false
  type: LoadBalancer
  port: 8080
  annotations: {}

# Integrations pods configuration
detached_integrations:
  enabled: false
  replicaCount: 1
  resources:
    {}
    # limits:
    #   cpu: 100m
    #   memory: 128Mi
    # requests:
    #   cpu: 100m
    #   memory: 128Mi

  ## Deployment update strategy
  ## ref: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#strategy
  updateStrategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 0
    type: RollingUpdate

  ## Affinity for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
  affinity: {}

  ## Node labels for pod assignment
  ## ref: https://kubernetes.io/docs/user-guide/node-selection/
  nodeSelector: {}

  ## Tolerations for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
  tolerations: []

  ## Topology spread constraints for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/
  topologySpreadConstraints: []

  ## Priority class for the pods
  ## ref: https://kubernetes.io/docs/concepts/scheduling-eviction/pod-priority-preemption/
  priorityClassName: ""

  # Extra containers which runs as sidecar
  extraContainers: ""
  # extraContainers: |
  # - name: cloud-sql-proxy
  #   image: gcr.io/cloud-sql-connectors/cloud-sql-proxy:2.1.2
  #   args:
  #     - --private-ip
  #     - --port=5432
  #     - example:europe-west3:grafana-oncall-db

  # Extra volume mounts for the container
  extraVolumeMounts: []
  # - mountPath: /mnt/postgres-tls
  #   name: postgres-tls
  # - mountPath: /mnt/redis-tls
  #   name: redis-tls

  # Extra volumes for the pod
  extraVolumes: []
  # - name: postgres-tls
  #   configMap:
  #     name: my-postgres-tls
  #     defaultMode: 0640
  # - name: redis-tls
  #   configMap:
  #     name: my-redis-tls
  #     defaultMode: 0640

# Celery workers pods configuration
celery:
  replicaCount: 1
  worker_queue: "default,critical,long,slack,telegram,webhook,celery,grafana,retry"
  worker_concurrency: "1"
  worker_max_tasks_per_child: "100"
  worker_beat_enabled: "True"
  ## Restart of the celery workers once in a given interval as an additional precaution to the probes
  ## If this setting is enabled TERM signal will be sent to celery workers
  ## It will lead to warm shutdown (waiting for the tasks to complete) and restart the container
  ## If this setting is set numbers of pod restarts will increase
  ## Comment this line out if you want to remove restarts
  worker_shutdown_interval: "65m"
  livenessProbe:
    enabled: true
    initialDelaySeconds: 30
    periodSeconds: 300
    timeoutSeconds: 10
  resources:
    {}
    # limits:
    #   cpu: 100m
    #   memory: 128Mi
    # requests:
    #   cpu: 100m
    #   memory: 128Mi

  # Labels for celery pods
  podLabels: {}

  ## Affinity for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
  affinity: {}

  ## Node labels for pod assignment
  ## ref: https://kubernetes.io/docs/user-guide/node-selection/
  nodeSelector: {}

  ## Tolerations for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
  tolerations: []

  ## Topology spread constraints for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/
  topologySpreadConstraints: []

  ## Priority class for the pods
  ## ref: https://kubernetes.io/docs/concepts/scheduling-eviction/pod-priority-preemption/
  priorityClassName: ""

  # Extra containers which runs as sidecar
  extraContainers: ""
  # extraContainers: |
  # - name: cloud-sql-proxy
  #   image: gcr.io/cloud-sql-connectors/cloud-sql-proxy:2.1.2
  #   args:
  #     - --private-ip
  #     - --port=5432
  #     - example:europe-west3:grafana-oncall-db

  # Extra volume mounts for the main container
  extraVolumeMounts: []
  # - mountPath: /mnt/postgres-tls
  #   name: postgres-tls
  # - mountPath: /mnt/redis-tls
  #   name: redis-tls

  # Extra volumes for the pod
  extraVolumes: []
  # - name: postgres-tls
  #   configMap:
  #     name: my-postgres-tls
  #     defaultMode: 0640
  # - name: redis-tls
  #   configMap:
  #     name: my-redis-tls
  #     defaultMode: 0640

# Telegram polling pod configuration
telegramPolling:
  enabled: false
  resources:
    {}
    # limits:
    #   cpu: 100m
    #   memory: 128Mi
    # requests:
    #   cpu: 100m
    #   memory: 128Mi

  # Labels for telegram-polling pods
  podLabels: {}

  # Extra volume mounts for the main container
  extraVolumeMounts: []
  # - mountPath: /mnt/postgres-tls
  #   name: postgres-tls
  # - mountPath: /mnt/redis-tls
  #   name: redis-tls

  # Extra volumes for the pod
  extraVolumes: []
  # - name: postgres-tls
  #   configMap:
  #     name: my-postgres-tls
  #     defaultMode: 0640
  # - name: redis-tls
  #   configMap:
  #     name: my-redis-tls
  #     defaultMode: 0640

oncall:
  # this is intended to be used for local development. In short, it will mount the ./engine dir into
  # any backend related containers, to allow hot-reloading + also run the containers with slightly modified
  # startup commands (which configures the hot-reloading)
  devMode: false

  # Override default MIRAGE_CIPHER_IV (must be 16 bytes long)
  # For existing installation, this should not be changed.
  # mirageCipherIV: 1234567890abcdef
  # oncall secrets
  secrets:
    # Use existing secret. (secretKey and mirageSecretKey is required)
    existingSecret: ""
    # The key in the secret containing secret key
    secretKey: ""
    # The key in the secret containing mirage secret key
    mirageSecretKey: ""
  # Slack configures the Grafana Oncall Slack ChatOps integration.
  slack:
    # Enable the Slack ChatOps integration for the Oncall Engine.
    enabled: true
    # clientId configures the Slack app OAuth2 client ID.
    # api.slack.com/apps/<yourApp> -> Basic Information -> App Credentials -> Client ID
    clientId: ~
    # clientSecret configures the Slack app OAuth2 client secret.
    # api.slack.com/apps/<yourApp> -> Basic Information -> App Credentials -> Client Secret
    clientSecret: ~
    # signingSecret - configures the Slack app signature secret used to sign
    # requests comming from Slack.
    # api.slack.com/apps/<yourApp> -> Basic Information -> App Credentials -> Signing Secret
    signingSecret: ~
    # Use existing secret for clientId, clientSecret and signingSecret.
    # clientIdKey, clientSecretKey and signingSecretKey are required
    existingSecret: ""
    # The key in the secret containing OAuth2 client ID
    clientIdKey: ""
    # The key in the secret containing OAuth2 client secret
    clientSecretKey: ""
    # The key in the secret containing the Slack app signature secret
    signingSecretKey: ""
    # OnCall external URL
    redirectHost: ~
  telegram:
    enabled: false
    token: ~
    webhookUrl: ~
    # Use existing secret. (tokenKey is required)
    existingSecret: ""
    # The key in the secret containing Telegram token
    tokenKey: ""
  smtp:
    enabled: true
    host: ~
    port: ~
    username: ~
    password: ~
    tls: ~
    ssl: ~
    fromEmail: ~
  exporter:
    enabled: false
    authToken: ~
  twilio:
    # Twilio account SID/username to allow OnCall to send SMSes and make phone calls
    accountSid: ""
    # Twilio password to allow OnCall to send SMSes and make calls
    authToken: ""
    # Number from which you will receive calls and SMS
    # (NOTE: must be quoted, otherwise would be rendered as float value)
    phoneNumber: ""
    # SID of Twilio service for number verification. You can create a service in Twilio web interface.
    # twilio.com -> verify -> create new service
    verifySid: ""
    # Twilio API key SID/username to allow OnCall to send SMSes and make phone calls
    apiKeySid: ""
    # Twilio API key secret/password to allow OnCall to send SMSes and make phone calls
    apiKeySecret: ""
    # Use existing secret for authToken, phoneNumber, verifySid, apiKeySid and apiKeySecret.
    existingSecret: ""
    # Twilio password to allow OnCall to send SMSes and make calls
    # The key in the secret containing the auth token
    authTokenKey: ""
    # The key in the secret containing the phone number
    phoneNumberKey: ""
    # The key in the secret containing verify service sid
    verifySidKey: ""
    # The key in the secret containing api key sid
    apiKeySidKey: ""
    # The key in the secret containing the api key secret
    apiKeySecretKey: ""
    # Phone notifications limit (the only non-secret value).
    # TODO: rename to phoneNotificationLimit
    limitPhone:

# Whether to run django database migrations automatically
migrate:
  enabled: true
  # TTL can be unset by setting ttlSecondsAfterFinished: ""
  ttlSecondsAfterFinished: 20
  # use a helm hook to manage the migration job
  useHook: false
  annotations: {}

  ## Affinity for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
  affinity: {}

  ## Node labels for pod assignment
  ## ref: https://kubernetes.io/docs/user-guide/node-selection/
  nodeSelector: {}

  ## Tolerations for pod assignment
  ## ref: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
  tolerations: []

  # Extra containers which runs as sidecar
  extraContainers: ""
  # extraContainers: |
  # - name: cloud-sql-proxy
  #   image: gcr.io/cloud-sql-connectors/cloud-sql-proxy:2.1.2
  #   args:
  #     - --private-ip
  #     - --port=5432
  #     - example:europe-west3:grafana-oncall-db
  resources:
    {}
    # limits:
    #   cpu: 100m
    #   memory: 128Mi
    # requests:
    #   cpu: 100m
    #   memory: 128Mi

  # Extra volume mounts for the main container
  extraVolumeMounts: []
  # - mountPath: /mnt/postgres-tls
  #   name: postgres-tls
  # - mountPath: /mnt/redis-tls
  #   name: redis-tls

  # Extra volumes for the pod
  extraVolumes: []
  # - name: postgres-tls
  #   configMap:
  #     name: my-postgres-tls
  #     defaultMode: 0640
  # - name: redis-tls
  #   configMap:
  #     name: my-redis-tls
  #     defaultMode: 0640

# Sets environment variables with name capitalized and prefixed with UWSGI_,
# and dashes are substituted with underscores.
# see more: https://uwsgi-docs.readthedocs.io/en/latest/Configuration.html#environment-variables
# Set null to disable all UWSGI environment variables
uwsgi:
  listen: 1024

# Additional env variables to add to deployments
env: {}

# Enable ingress object for external access to the resources
ingress:
  enabled: true
  #  className: ""
  annotations:
    kubernetes.io/ingress.class: "nginx"
    cert-manager.io/issuer: "letsencrypt-prod"
  tls:
    - hosts:
        - "{{ .Values.base_url }}"
      secretName: certificate-tls
  # Extra paths to prepend to the host configuration. If using something
  # like an ALB ingress controller, you may want to configure SSL redirects
  extraPaths: []
  # - path: /*
  #   backend:
  #     serviceName: ssl-redirect
  #     servicePort: use-annotation
  ## Or for k8s > 1.19
  # - path: /*
  #   pathType: Prefix
  #   backend:
  #     service:
  #       name: ssl-redirect
  #       port:
  #         name: use-annotation

# Whether to install ingress controller
ingress-nginx:
  enabled: true

# Install cert-manager as a part of the release
cert-manager:
  enabled: false
  # Instal CRD resources
  installCRDs: true
  webhook:
    timeoutSeconds: 30
    # cert-manager tries to use the already used port, changing to another one
    # https://github.com/cert-manager/cert-manager/issues/3237
    # https://cert-manager.io/docs/installation/compatibility/
    securePort: 10260
  # Fix self-checks https://github.com/jetstack/cert-manager/issues/4286
  podDnsPolicy: None
  podDnsConfig:
    nameservers:
      - 8.8.8.8
      - 1.1.1.1

database:
  # can be either mysql or postgresql
  type: postgresql

# MySQL is included into this release for the convenience.
# It is recommended to host it separately from this release
# Set mariadb.enabled = false and configure externalMysql
mariadb:
  enabled: false
  auth:
    database: oncall
    existingSecret:
  primary:
    extraEnvVars:
      - name: MARIADB_COLLATE
        value: utf8mb4_unicode_ci
      - name: MARIADB_CHARACTER_SET
        value: utf8mb4
  secondary:
    extraEnvVars:
      - name: MARIADB_COLLATE
        value: utf8mb4_unicode_ci
      - name: MARIADB_CHARACTER_SET
        value: utf8mb4

# Make sure to create the database with the following parameters:
# CREATE DATABASE oncall CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
externalMysql:
  host:
  port:
  db_name:
  user:
  password:
  # Use an existing secret for the mysql password.
  existingSecret:
  # The key in the secret containing the mysql username
  usernameKey:
  # The key in the secret containing the mysql password
  passwordKey:
  # Extra options (see example below)
  # Reference: https://pymysql.readthedocs.io/en/latest/modules/connections.html
  options:
  # options: >-
  #   ssl_verify_cert=true
  #   ssl_verify_identity=true
  #   ssl_ca=/mnt/mysql-tls/ca.crt
  #   ssl_cert=/mnt/mysql-tls/client.crt
  #   ssl_key=/mnt/mysql-tls/client.key

# PostgreSQL is included into this release for the convenience.
# It is recommended to host it separately from this release
# Set postgresql.enabled = false and configure externalPostgresql
postgresql:
  enabled: truw
  auth:
    database: oncall
    existingSecret:

# Make sure to create the database with the following parameters:
# CREATE DATABASE oncall WITH ENCODING UTF8;
externalPostgresql:
  host:
  port:
  db_name:
  user:
  password:
  # Use an existing secret for the database password
  existingSecret:
  # The key in the secret containing the database password
  passwordKey:
  # Extra options (see example below)
  # Reference: https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PARAMKEYWORDS
  options:
  # options: >-
  #   sslmode=verify-full
  #   sslrootcert=/mnt/postgres-tls/ca.crt
  #   sslcert=/mnt/postgres-tls/client.crt
  #   sslkey=/mnt/postgres-tls/client.key

# RabbitMQ is included into this release for the convenience.
# It is recommended to host it separately from this release
# Set rabbitmq.enabled = false and configure externalRabbitmq
rabbitmq:
  enabled: true
  auth:
    existingPasswordSecret:

broker:
  type: rabbitmq

externalRabbitmq:
  host:
  port:
  user:
  password:
  protocol:
  vhost:
  # Use an existing secret for the rabbitmq password
  existingSecret:
  # The key in the secret containing the rabbitmq password
  passwordKey: ""
  # The key in the secret containing the rabbitmq username
  usernameKey: username

# Redis is included into this release for the convenience.
# It is recommended to host it separately from this release
redis:
  enabled: true
  auth:
    existingSecret:

externalRedis:
  protocol:
  host:
  port:
  database:
  username:
  password:
  # Use an existing secret for the redis password
  existingSecret:
  # The key in the secret containing the redis password
  passwordKey:

  # SSL options
  ssl_options:
    enabled: false
    # CA certificate
    ca_certs:
    # Client SSL certs
    certfile:
    keyfile:
    # SSL verification mode: "cert_none" | "cert_optional" | "cert_required"
    cert_reqs:

# Grafana is included into this release for the convenience.
# It is recommended to host it separately from this release
grafana:
  enabled: false
  grafana.ini:
    server:
      domain: helm-testing-grafana
      root_url: "%(protocol)s://%(domain)s/grafana/"
      serve_from_sub_path: true
    feature_toggles:
      enable: externalServiceAccounts
  persistence:
    enabled: true
  # Disable psp as PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
  rbac:
    pspEnabled: false
  plugins:
    - grafana-oncall-app
  extraVolumes:
    - name: provisioning
      configMap:
        name: helm-testing-grafana-plugin-provisioning
  extraVolumeMounts:
    - name: provisioning
      mountPath: /etc/grafana/provisioning/plugins/grafana-oncall-app-provisioning.yaml
      subPath: grafana-oncall-app-provisioning.yaml

externalGrafana:
  # Example: https://grafana.mydomain.com
  url: <your grafana URL>

nameOverride: ""
fullnameOverride: ""

serviceAccount:
  # Specifies whether a service account should be created
  create: true
  # Annotations to add to the service account
  annotations: {}
  # The name of the service account to use.
  # If not set and create is true, a name is generated using the fullname template
  name: ""

podAnnotations: {}

podSecurityContext:
  {}
  # fsGroup: 2000

securityContext:
  {}
  # capabilities:
  #   drop:
  #   - ALL
  # readOnlyRootFilesystem: true
  # runAsNonRoot: true
  # runAsGroup: 2000
  # runAsUser: 1000

init:
  securityContext:
    {}
    # allowPrivilegeEscalation: false
    # capabilities:
    #   drop:
    #   - ALL
    # privileged: false
    # readOnlyRootFilesystem: true
    # runAsGroup: 2000
    # runAsNonRoot: true
    # runAsUser: 1000
  resources:
    {}
    # limits:
    #   cpu: 100m
    #   memory: 128Mi
    # requests:
    #   cpu: 100m
    #   memory: 128Mi

ui:
  # this is intended to be used for local development. In short, it will spin up an additional container
  # running the plugin frontend, such that hot reloading can be enabled
  enabled: false
  image:
    repository: oncall/ui
    tag: dev
  # Additional env vars for the ui container
  env: {}

prometheus:
  enabled: false
  # extraScrapeConfigs: |
  #   - job_name: 'oncall-exporter'
  #     metrics_path: /metrics/
  #     static_configs:
  #       - targets:
  #         - oncall-dev-engine.default.svc.cluster.local:8080

主な変更点としては
・grafanaの起動無効（既に建ててある物を使う為、無い場合は有効にしておくと同時に起動します）
・cert-managerをfalseに
・DBをpostgresに変更（拘りがなければMariaDBでも大丈夫です）
・slack通知機能を有効化（試すだけなら別に不要）

後はhelm install -n <namespace> release-oncall grafana/oncall --values=values.yamlでpodを建てるだけです。

GrafanaとOncallの連携

GrafanaにOncallプラグインをインストールします。
メニューの歯車マーク⇨plugins and data⇨pluginsを開いてoncallを検索しインストール

Oncall API URLを入力してConnect出来ればOK！

接続完了するとoncallメニューが利用可能になります。

後は+Escalationからお好きな設定を入れるだけです。この辺りのやり方は需要があればまた別の機会に。

最後に&注意点

・chartのreadmeにもある通りrabbitmq,redis,DBは本番運用時には別で建てる事が望ましいです。
・Grafanaは基本metricsベースのアラートしか投げられないですが、oncallでincidentも一括管理できるのは良さそう+OSS版でGrafana Cloudを使わなくても良い点はgood