背景说明
近期公司的 devIstio 环境已整体迁移到火山引擎，该环境SRE主要采用K8S进行运维，迁移后相关的应用日志当前只能使用 kubectl 进行查看，所以就根据SRE提供的指导材料做了些了解，当前对K8S没有做深入了解，没有全局观，只能从一个开发者角度做到浅尝辄止。
环境准备
安装 kubectl
开发机用的 Windows 11，可使用下面任意一个方法进行安装：
- 通过 PowerShell 中安装：
& $([scriptblock]::Create((New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/coreweave/kubernetes-cloud/master/getting-started/k8ctl_setup.ps1')))- 通过 Chocolatey 安装：
choco install kubernetes-cli- 通过 Scoop 安装:
scoop install kubectl本地配置访问 K8S 集群
安装 kubectlho 后，将 SRE 提供的 kubeconfig 文件，复制到系统用户目录下的.kube/cotx/目录（缺省为：%USERPROFILE%.kubeconfig）。
如果不是在缺省目录，请在系统的环境变量中添加 KUBECONFIG 变量，如下图所示：
开始使用
基本使用
获取所有 pod
kubectl get pods -A示例效果：
$ kubectl get pods -A
NAMESPACE NAME READY STATUS RESTARTS AGE
console blsc-ui-594555ff77-z49ln 1/1 Running 0 32d
console consent-forward-8499796656-qr9mc 1/1 Running 0 49d
console consent-login-8678cdb6f4-2wjh8 1/1 Running 0 49d
console console-api-entry-76d7d8bbc-v7kcm 1/1 Running 0 17d
console console-batch-f88bf9dd6-62fwm 1/1 Running 0 49d
console console-biz-84f458cfcd-v6pjj 1/1 Running 0 2d21h
console console-blsc-kbs-7b66548df6-8lwh7 1/1 Running 0 49d
console console-cluster-5ddb65ff54-2k4lf 1/1 Running 0 49d
console console-config-server-5d6cf99b9b-wt7s9 1/1 Running 0 46h
console console-data-sync-556dc4dc8-z2d9t 1/1 Running 0 18d
console console-dev-guide-6bf4bcb79c-48crp 1/1 Running 0 6d5h
console console-gateway-fbbf58dd-rcw8f 1/1 Running 0 32d
console console-kbs-67cc85848f-7tg9h 1/1 Running 0 49d
console console-mobile-blsc-ui-846f5f9795-jbhwc 1/1 Running 0 48d
console console-mobile-server-8555b7b5cf-x9l26 1/1 Running 0 49d
console console-mobile-ui-79df845ffc-445s9 1/1 Running 0 32d
console console-notice-5b8dc5fd68-vmtf7 1/1 Running 0 39d
console console-order-66b54dcf8-h4rv2 0/1 CrashLoopBackOff 536 (2m59s ago) 46h
console console-prototypes-68c984cd88-mpzjb 1/1 Running 0 38d
console console-singleton-64b7d87877-qp5x4 1/1 Running 0 28d
console console-ui-56c8746566-8bbf5 1/1 Running 0 3d2h
console dmc-api-doc-7cf59d7f5d-gjxbs 1/1 Running 0 49d
console dmc-core-5dcb7dc65b-fb2gv 1/1 Running 0 49d
console dmc-gateway-59fc6b767f-hzvgf 1/1 Running 0 49d
console dmc-magic-boot-5d89987468-r5m7r 1/1 Running 0 49d
console dmc-magic-boot-naive-8669fdc878-td7n8 1/1 Running 0 49d
console dmc-screen-5f5cb57d89-cfskh 1/1 Running 0 49d
console dmc-show-kbs-57b67545f5-4cc9k 1/1 Running 0 126m
console dmc-ui-d8f5bd4b-fhmb7 1/1 Running 0 49d
console dmc-worktime-backend-5dc69ccc6b-qf97p 1/1 Running 0 49d
console dmc-worktime-ui-7db6df7469-d4fxt 1/1 Running 0 49d
kube-system cello-7qv8s 2/2 Running 2 (49d ago) 111d
kube-system cello-b8d6p 2/2 Running 3 (49d ago) 111d
kube-system cello-mrch7 2/2 Running 2 (49d ago) 111d
kube-system cello-pp5wz 2/2 Running 2 (49d ago) 111d
kube-system coredns-58cd886448-clswr 1/1 Running 0 49d
kube-system coredns-58cd886448-vlrwd 1/1 Running 0 49d
kube-system metrics-server-7769c76b67-rfnvm 1/1 Running 0 49d
sup sup-db-query-fd7675849-sjp8g 1/1 Running 0 49d
sup sup-mq-5bc8ccf978-5x5mc 1/1 Running 0 49d
sup sup-nginx-8575c78879-27gxs 1/1 Running 0 31d
sup sup-oauth2-85ccd96db7-76rtw 1/1 Running 0 49d
查看日志
kubectl logs [podname] -f示例效果
$ kubectl logs dmc-ui-d8f5bd4b-fhmb7 -f
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: IPv6 listen already enabled
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2024/06/24 03:06:27 [notice] 1#1: using the "epoll" event method
2024/06/24 03:06:27 [notice] 1#1: nginx/1.22.1
2024/06/24 03:06:27 [notice] 1#1: built by gcc 11.2.1 20220219 (Alpine 11.2.1_git20220219)
2024/06/24 03:06:27 [notice] 1#1: OS: Linux 5.10.135-6-velinux1u1-amd64
2024/06/24 03:06:27 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2024/06/24 03:06:27 [notice] 1#1: start worker processes
2024/06/24 03:06:27 [notice] 1#1: start worker process 22
2024/06/24 03:06:27 [notice] 1#1: start worker process 23
2024/06/24 03:06:27 [notice] 1#1: start worker process 24
2024/06/24 03:06:27 [notice] 1#1: start worker process 25
2024/06/24 03:06:27 [notice] 1#1: start worker process 26
2024/06/24 03:06:27 [notice] 1#1: start worker process 27
2024/06/24 03:06:27 [notice] 1#1: start worker process 28
2024/06/24 03:06:27 [notice] 1#1: start worker process 29
查看最近 10 行日志
kubectl logs --tail 1000 -f [podname]示例效果
$ kubectl logs --tail 10 dmc-ui-d8f5bd4b-fhmb7
172.17.16.38 - - [26/Jul/2024:00:50:52 +0000] "GET /favicon.ico HTTP/1.0" 200 16958 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36" "-"
172.17.16.38 - - [31/Jul/2024:17:09:02 +0000] "GET / HTTP/1.0" 200 625 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36" "-"
172.17.16.38 - - [31/Jul/2024:17:09:02 +0000] "GET / HTTP/1.0" 200 625 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36" "-"
172.17.16.38 - - [31/Jul/2024:17:09:02 +0000] "GET /assets/vendor.9901ae39.js HTTP/1.0" 200 1395988 "https://dmc-ui.console.dev.paratera.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36" "-"
172.17.16.38 - - [31/Jul/2024:17:09:02 +0000] "GET /assets/index.2058bab1.js HTTP/1.0" 200 100982 "https://dmc-ui.console.dev.paratera.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36" "-"
172.17.16.38 - - [31/Jul/2024:17:09:07 +0000] "GET /favicon.ico HTTP/1.0" 200 16958 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36" "-"
172.17.16.38 - - [01/Aug/2024:11:08:22 +0000] "GET / HTTP/1.0" 200 625 "-" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36" "-"
172.17.16.38 - - [01/Aug/2024:11:08:28 +0000] "GET /favicon.ico HTTP/1.0" 200 16958 "-" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36" "-"
172.17.16.38 - - [01/Aug/2024:11:08:28 +0000] "GET /assets/index.2058bab1.js HTTP/1.0" 200 100982 "-" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36" "-"
172.17.16.38 - - [02/Aug/2024:01:35:56 +0000] "GET / HTTP/1.0" 200 625 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36" "-"-n 指定命名空间
$ kubectl get pods -n aps
NAME READY STATUS RESTARTS AGE
aps-api-entry-9c74586db-7djmp 1/1 Running 0 11d
aps-config-server-544bb7677c-nwr6x 1/1 Running 0 5d22h
aps-data-etl-649b79cb79-mbwr7 1/1 Running 0 46m重启应用
$ kubectl rollout restart deployment aps-data-etl -n aps
deployment.apps/aps-data-etl restarted
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