GoTTY - 终端工具变为 Web 应用
GoTTY 是一个简单的命令行工具，可将您的 CLI 工具变成 Web 应用。
快速入门
1、安装 GoTTY
# Mac 版
brew install yudai/gotty/gotty
如果你有 GO 的环境，也可以通过如下方式安装：
go get github.com/yudai/gotty
2、GoTTY 用法
Usage: gotty [options] <command> [<arguments...>]
options
--address value, -a value IP address to listen (default: "0.0.0.0") [$GOTTY_ADDRESS]
--port value, -p value Port number to liten (default: "8080") [$GOTTY_PORT]
--permit-write, -w Permit clients to write to the TTY (BE CAREFUL) [$GOTTY_PERMIT_WRITE]
--credential value, -c value Credential for Basic Authentication (ex: user:pass, default disabled) [$GOTTY_CREDENTIAL]
--random-url, -r Add a random string to the URL [$GOTTY_RANDOM_URL]
--random-url-length value Random URL length (default: 8) [$GOTTY_RANDOM_URL_LENGTH]
--tls, -t Enable TLS/SSL [$GOTTY_TLS]
--tls-crt value TLS/SSL certificate file path (default: "~/.gotty.crt") [$GOTTY_TLS_CRT]
--tls-key value TLS/SSL key file path (default: "~/.gotty.key") [$GOTTY_TLS_KEY]
--tls-ca-crt value TLS/SSL CA certificate file for client certifications (default: "~/.gotty.ca.crt") [$GOTTY_TLS_CA_CRT]
--index value Custom index.html file [$GOTTY_INDEX]
--title-format value Title format of browser window (default: "{{ .command }}@{{ .hostname }}") [$GOTTY_TITLE_FORMAT]
--reconnect Enable reconnection [$GOTTY_RECONNECT]
--reconnect-time value Time to reconnect (default: 10) [$GOTTY_RECONNECT_TIME]
--max-connection value Maximum connection to gotty (default: 0) [$GOTTY_MAX_CONNECTION]
--once Accept only one client and exit on disconnection [$GOTTY_ONCE]
--timeout value Timeout seconds for waiting a client(0 to disable) (default: 0) [$GOTTY_TIMEOUT]
--permit-arguments Permit clients to send command line arguments in URL (e.g. http://example.com:8080/?arg=AAA&arg=BBB) [$GOTTY_PERMIT_ARGUMENTS]
--width value Static width of the screen, 0(default) means dynamically resize (default: 0) [$GOTTY_WIDTH]
--height value Static height of the screen, 0(default) means dynamically resize (default: 0) [$GOTTY_HEIGHT]
--ws-origin value A regular expression that matches origin URLs to be accepted by WebSocket. No cross origin requests are acceptable by default [$GOTTY_WS_ORIGIN]
--term value Terminal name to use on the browser, one of xterm or hterm. (default: "xterm") [$GOTTY_TERM]
--close-signal value Signal sent to the command process when gotty close it (default: SIGHUP) (default: 1) [$GOTTY_CLOSE_SIGNAL]
--close-timeout value Time in seconds to force kill process after client is disconnected (default: -1) (default: -1) [$GOTTY_CLOSE_TIMEOUT]
--config value Config file path (default: "~/.gotty") [$GOTTY_CONFIG]
--version, -v print the version
3、实践
# 示例
gotty -w python3
访问 http://127.0.0.1:8080 即可在线体验 Python3 环境。
进阶篇
容器化时代，遇到一些问题的时候，会进入容器内部排查问题，依靠命令行确实可以解决，但是效率较低，如果将容器作为 Web 可访问的应用，那么处理问题就会便捷很多。
下面将介绍如何使用 GoTTY 连接 k8s 集群中的任意容器。
1、构建 GoTTY Docker 镜像
已构建好的镜像：registry.cn-beijing.aliyuncs.com/tlab/k8s-gotty:latest
gotty：可运行的gotty程序，查看 [Releases]列表，选择合适的kubernetes.repo：用于下载 kubectl
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
Dockerfile：用于构建镜像
FROM centos:latest
RUN yum install -y epel-release kde-l10n-Chinese glibc-common wget
RUN localedef -c -f UTF-8 -i zh_CN zh_CN.utf8
ENV LC_ALL zh_CN.utf8
ADD gotty /root/
ADD kubernetes.repo /etc/yum.repos.d/
RUN yum -y install kubectl
WORKDIR /root
EXPOSE 8080
CMD ["./gotty", "-w", "--permit-arguments", "kubectl", "exec", "-it", "-n"]
2、在 k8s 集群中运行 GoTTY
kind: Deployment
apiVersion: apps/v1
metadata:
name: gotty
namespace: default
spec:
replicas: 1
selector:
matchLabels:
k8s-app: gotty
template:
metadata:
labels:
k8s-app: gotty
spec:
serviceAccountName: <此处填具有合适权限的k8s用户名>
containers:
- name: gotty
image: registry.cn-beijing.aliyuncs.com/tlab/k8s-gotty
ports:
- containerPort: 8080
protocol: TCP
3、暴露 GoTTY 服务
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: gotty
name: gotty-service
namespace: default
spec:
ports:
- port: 80
targetPort: 8080
nodePort: 38080
selector:
k8s-app: gotty
type: NodePort
4、访问容器
在终端里，进入容器的命令是：
kubectl exec -it -n <Namespace> <PodName>
那么，利用 GoTTY 访问则是 http://<ip>:38080/?arg=<Namespace>&arg=<PodName>
原文转载：https://www.jianshu.com/p/dbeb35ff437d
（版权归原作者所有，侵删）
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