Add startup.sh & revise markdowns

Author: anyflow

k8s/command.md

@@ -0,0 +1,45 @@
+# Access pod
+
+- 특정 pod bash에 접근
+
+  ```bash
+  kubectl exec --stdin --tty <pod name> -- /bin/bash
+  ```
+
+- network util pod 생성 및 shell 로그인
+
+  ```bash
+  kubectl run <netutil name> --rm -i --tty --image praqma/network-multitool -- bash
+  ```
+
+# Dashboard
+
+- *관련 reference* : `https://kubernetes.io/ko/docs/tasks/access-application-cluster/web-ui-dashboard/`
+
+- dashboard UI 배포
+
+  ```bash
+  kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.4.0/aio/deploy/recommended.yaml
+  ```
+
+- dashboard 접속 활성화
+
+  ```bash
+  kubectl proxy
+  ```
+
+- dashboard URL (접근)
+
+  ```
+  http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/
+  ```
+
+- dashboard UI에 접근에 사용할 token 얻기
+
+  ```bash
+  kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | awk '/^deployment-controller-token-/{print $1}') | awk '$1=="token:"{print $2}'
+  ```
+
+# 참고 : TODO
+
+- dashboard에 service, ingress, node 등의  항목이 나타나지 않는데, 이를 해결

k8s/mongo.md

@@ -56,7 +56,21 @@
    > rs.stepDown()
    ```
 
-## 참고
+# 검토 TODO
 
-- 특정 pod bash에 접근 : `kubectl exec --stdin --tty <pod name> -- /bin/bash`
-- network util pod 생성 및 shell 로그인 `kubectl run my-shell --rm -i --tty --image praqma/network-multitool -- bash`
+### Kind Persistent Volumes <https://mauilion.dev/posts/kind-pvc/>
+
+  1. **default storage class**: I want there to be a built in storage class so that I can deploy applications that request persistent volume claims.
+
+  2. **pod restart**: If my pod restarts I want that pod to be scheduled such that the persistent volume claim is available to my pod. This ensures that if I have to restart and my pod will always come back with access to the same data.
+
+  3. **restore volumes**: I want to be able to bring up a kind cluster and regain access to a previously provisioned persistent volume claim.
+
+  4. **volume mobility**: I want to be able to schedule my pod to multiple nodes and have it access the same persistent volume claim. This requires that the peristent volume be made available to all nodes.
+
+### 쿠버네티스 볼륨 개념 정리 <https://blog.eunsukim.me/posts/kubernetes-volume-overview>
+
+   - Persistent Volume
+   - Persistent Volume Claim
+   - Storage Class
+   - 상기 항목의 용도 : 볼륨 관리자와 볼륨 사용자 관점에서 설명

k8s/readme.md

@@ -13,6 +13,7 @@
   - [ingress 테스트](#ingress-테스트)
   - [load balancer 테스트](#load-balancer-테스트)
 - [클러스터 삭제하기](#클러스터-삭제하기)
+
 # Description
 
 - **kind**가 무엇인지, 어떻게 사용하는지

k8s/startup.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+Green='\033[0;32m'        # Green
+NC='\033[0m'              # No Color
+
+echo "${Green}[startup] Creating k8s cluster...${NC}"
+kind create cluster --config ./kind-config.yaml
+
+echo
+echo "${Green}[startup] Deploying NGINX ingress controller...${NC}"
+kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml
+
+echo
+echo "${Green}[startup] Waiting for NGINX setting completion...${NC}"
+kubectl wait --namespace ingress-nginx \
+  --for=condition=ready pod \
+  --selector=app.kubernetes.io/component=controller \
+  --timeout=90s
+
+echo
+echo "${Green}[startup] Creating metallb load balancer namespace...${NC}"
+kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.12.1/manifests/namespace.yaml
+
+echo
+echo "${Green}[startup] Deploying metallb...${NC}"
+kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.12.1/manifests/metallb.yaml
+
+echo
+echo "${Green}[startup] Waiting for metallb setting completion...${NC}"
+#kubectl get pods -n metallb-system --watch
+kubectl wait --namespace metallb-system \
+  --for=condition=ready pod \
+  --selector=app=metallb,component=speaker \
+  --timeout=90s