透過 Makefile 起 k3s, 再建個 ES + Kibana 玩

Install K8s cluster, Rancher, Elasticsearch & Kibana on local (mac)

K3s + Rancher

• Prerequisite:
  • install brew by https://brew.sh/
  • install multipass by brew cask install multipass
• Makefile:

.PHONY: all

k3s:
	multipass launch --name k3s --cpus 4 --mem 4g --disk 20g
	## 以下這段是已準備好多個 Node，在各個 Node 執行
    #curl -sfL https://get.k3s.io | sh -s - server \
    #		--write-kubeconfig-mode 644 \
    #		--datastore-endpoint="mysql://root:123456@tcp(172.16.8.190:3306)/k3sdb"
    ## 以下這個是創建空的 cluster
	multipass exec k3s -- bash -c "curl -sfL https://get.k3s.io | sh -s - --write-kubeconfig-mode 644"

K3S_IP=$(shell multipass info k3s | grep IPv4 | awk '{print $$2}')
cfg:
	multipass exec k3s sudo cat /etc/rancher/k3s/k3s.yaml > k3s.yaml
	sed -i '' "s/127.0.0.1/${K3S_IP}/" k3s.yaml
	multipass exec k3s -- sudo bash -c "sed -i s/127.0.0.1/${K3S_IP}/ /etc/rancher/k3s/k3s.yaml"
	export KUBECONFIG=${PWD}/k3s.yaml
	@cp /etc/hosts backup_hosts
	@echo "${K3S_IP}	rancher.localdev" | sudo tee -a /etc/hosts > /dev/null

mnt:
	@mkdir shareFolder
	@cp ./Makefile ./shareFolder/Makefile
	@multipass mount ./shareFolder k3s:./shareFolder
	@multipass exec k3s -- bash -c "sudo apt install make"
	@multipass exec k3s -- bash -c "cp ./shareFolder/Makefile Makefile"
	@multipass exec k3s -- bash -c "make init"

cluster: k3s cfg mnt

init:
	###### 安裝 helm 3
	curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3
	chmod 700 get_helm.sh
	./get_helm.sh
	###### 安裝 cert-manager
	kubectl apply --validate=false -f https://github.com/jetstack/cert-manager/releases/download/v0.15.0/cert-manager.crds.yaml
	kubectl create namespace cert-manager
	helm repo add jetstack https://charts.jetstack.io
	helm repo update
	kubectl config view --raw >~/.kube/config
	helm install --wait --timeout=30s \
		cert-manager jetstack/cert-manager \
		--namespace cert-manager \
		--version v0.15.0
	kubectl rollout status --watch DEPLOYMENT/cert-manager -n cert-manager
	###### 安裝 rancher
	helm repo add rancher-stable https://releases.rancher.com/server-charts/stable
	helm repo update
	kubectl create namespace cattle-system
	helm install rancher rancher-stable/rancher \
		--namespace cattle-system \
		--set hostname=rancher.localdev
	kubectl -n cattle-system rollout status deploy/rancher
	kubectl -n cattle-system get ingresses

del:
	multipass stop k3s
	multipass delete k3s
	multipass purge
	@sudo cp -f backup_hosts /etc/hosts
	rm -rf backup_hosts
	rm -rf ./shareFolder
	rm -rf k3s.yaml

Elasticsearch

• Name: es
• Workload Type (click More options): Stateful set of 1 pod
• Docker Image: elasticsearch:7.6.2
• Port Mapping: nodeport 9200
• Environment Variables: discovery.type = single-node

Kibana

• Name: kibana
• Docker Image: kibana:7.6.2
• Port Mapping: nodeport 5601
• Environment Variables: ELASTICSEARCH_HOSTS = http://es:9200

Reference

• post