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This article shows you the installation and usage of GoTTY terminal tools in Web applications. The content is concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

GoTTY is a simple command-line tool that turns your CLI tool into a Web application.

1. Install brew install yudai/gotty/gotty for GoTTY# Mac

If you have a GO environment, you can also install it in the following ways:

Go get github.com/yudai/gotty2, GoTTY usage Usage: gotty [options] []

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. Practice

# example gotty-w python3

Visit http://127.0.0.1:8080 to experience the Python3 environment online.

Advanced chapter

In the containerization era, when you encounter some problems, you will enter the container to troubleshoot the problem, which can be solved by relying on the command line, but the efficiency is low. If the container is used as an application accessible to Web, it will be much more convenient to deal with the problem.

Here's how to use GoTTY to connect to any container in the k8s cluster.

1. Build a GoTTY Docker image

Constructed image: registry.cn-beijing.aliyuncs.com/tlab/k8s-gotty:latest

Gotty: runnable gotty programs, check the [Releases] list, and select the appropriate one.

Kubernetes.repo: used to download 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: used to build an image

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. Run GoTTYkind: 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: containers:-name: gotty image: registry.cn-beijing.aliyuncs.com/tlab/k8s- in the K8s cluster Gotty ports:-containerPort: 8080 protocol: TCP3, Expose GoTTY service 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: NodePort4, access container

In the terminal, the command to enter the container is:

Kubectl exec-it-n

Then, using GoTTY to access is http://:38080/?arg=&arg=

The above is the installation and usage of GoTTY terminal tools in Web applications. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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