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Walkthrough overview

[Telegraf] ---8086--> [InfluxDB] <---8086--- [CH Srv] <---443--- [External]
                          /\
                       8086|
                           |9094
                           \/
                      [Kapacitor]

이번 장에서는 보다 더 다양한 production 환경에 근접한 실습이 될 수 있도록 위 서비스를 배포하여 본다.
또한, K8s application package 관리의 편의성을 위해 Helm Chart를 사용하기로 한다.

기본적인 사용법은 Quickstart Helm 을 참고하고, 아래 컴포넌트들을 하나씩 배포하여 보자.

InfluxDB

CloudHub와 호환되는 InfluxDB의 버전은 1.18이므로, InfluxDB:1.18로 배포하기 위해 아래 influxdata의 repo를 추가한다.

Add Helm Repo

만일 아래 influxdata의 repo가 추가되어 있지 않다면, 아래 명령어로 추가하여 준다.

$ helm repo add influxdata https://helm.influxdata.com/
$ helm search repo influxdb
NAME                            CHART VERSION   APP VERSION     DESCRIPTION
bitnami/influxdb                5.7.0           2.7.1           InfluxDB(TM) is an open source time-series data...
influxdata/influxdb             4.12.3          1.8.10          Scalable datastore for metrics, events, and rea...
influxdata/influxdb-enterprise  0.1.22          1.10.0          Run InfluxDB Enterprise on Kubernetes
influxdata/influxdb2            2.1.1           2.3.0           A Helm chart for InfluxDB v2
influxdata/kapacitor            1.4.6           1.6.4           InfluxDB's native data processing engine. It ca...
influxdata/chronograf           1.2.5           1.9.4           Open-source web application written in Go and R...
influxdata/telegraf             1.8.28          1.26.3          Telegraf is an agent written in Go for collecti...
influxdata/telegraf-operator    1.3.11          v1.3.10         A Helm chart for Kubernetes to deploy telegraf-...

Installation

# 편의상 "helm-test" namespace 생성.
$ kubectl create ns helm-test

# helm-test ns에 chart name은 자동 생성 모드(-g)로 생성.
$ helm install -n helm-test -g influxdata/influxdb --set persistence.enabled=false
NAME: influxdb-1688227557
LAST DEPLOYED: Sun Jul  2 01:06:05 2023
NAMESPACE: helm-test
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
InfluxDB can be accessed via port 8086 on the following DNS name from within your cluster:

  http://influxdb-1688227557.helm-test:8086

You can connect to the remote instance with the influx CLI. To forward the API port to localhost:8086, run the following:

  kubectl port-forward --namespace helm-test $(kubectl get pods --namespace helm-test -l app=influxdb-1688227557 -o jsonpath='{ .items[0].metadata.name }') 8086:8086

You can also connect to the influx CLI from inside the container. To open a shell session in the InfluxDB pod, run the following:

  kubectl exec -i -t --namespace helm-test $(kubectl get pods --namespace helm-test -l app=influxdb-1688227557 -o jsonpath='{.items[0].metadata.name}') /bin/sh

To view the logs for the InfluxDB pod, run the following:

  kubectl logs -f --namespace helm-test $(kubectl get pods --namespace helm-test -l app=influxdb-1688227557 -o jsonpath='{ .items[0].metadata.name }')

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