DockerTTY is a simple command line tool that provides terminal over web for remote docker container.
DockerTTY is based on the work of GoTTY v1.0.0, but with following features:
- Provides terminal over web for remote docker container
- Allow to run command in the container like
docker exec -it ${containerId} sh - Do not leave legacy processes in container
If you have a Go language environment, you can install DockerTTY with the go get command.
$ go get github.com/supereagle/dockerttyUsage: dockertty [options] <command> [<arguments...>]
Running dockertty will start a web server. Open the URL with the specified container id on your web browser, DockerTTY will run docker exec -it ${containerId} sh, then you can run command on your terminal as if you are running them in the container.
By default, DockerTTY starts a web server at port 8080, and permits clients to write to the TTY.
--address, -a IP address to listen [$GOTTY_ADDRESS]
--port, -p "8080" Port number to listen [$GOTTY_PORT]
--permit-write, -w Permit clients to write to the TTY (BE CAREFUL) [$GOTTY_PERMIT_WRITE]
--credential, -c 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 "8" Random URL length [$GOTTY_RANDOM_URL_LENGTH]
--tls, -t Enable TLS/SSL [$GOTTY_TLS]
--tls-crt "~/.gotty.crt" TLS/SSL certificate file path [$GOTTY_TLS_CRT]
--tls-key "~/.gotty.key" TLS/SSL key file path [$GOTTY_TLS_KEY]
--tls-ca-crt "~/.gotty.ca.crt" TLS/SSL CA certificate file for client certifications [$GOTTY_TLS_CA_CRT]
--index Custom index.html file [$GOTTY_INDEX]
--title-format "GoTTY - {{ .Command }} ({{ .Hostname }})" Title format of browser window [$GOTTY_TITLE_FORMAT]
--reconnect Enable reconnection [$GOTTY_RECONNECT]
--reconnect-time "10" Time to reconnect [$GOTTY_RECONNECT_TIME]
--timeout "0" Timeout seconds for waiting a client (0 to disable) [$GOTTY_TIMEOUT]
--max-connection "0" Set the maximum number of simultaneous connections (0 to disable)
--once Accept only one client and exit on disconnection [$GOTTY_ONCE]
--permit-arguments Permit clients to send command line arguments in URL (e.g. http://example.com:8080/?arg=AAA&arg=BBB) [$GOTTY_PERMIT_ARGUMENTS]
--close-signal "1" Signal sent to the command process when gotty close it (default: SIGHUP) [$GOTTY_CLOSE_SIGNAL]
--config "~/.gotty" Config file path [$GOTTY_CONFIG]
--version, -v print the version
For more detailed usage, please refer to GoTTY Usage.
To login and exec command in containers in Kubernetes cluster, DockerTTY can be deployed as an agent on every Kubernetes nodes through Daemonset.
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
labels:
app: dockertty-agent
name: dockertty-agent
spec:
updateStrategy:
type: RollingUpdate
template:
metadata:
labels:
app: dockertty-agent
spec:
restartPolicy: Always
hostNetwork: true
containers:
- image: ${DOCKERTTY_AGENT_IMAGE}
name: dockertty-agent
resources:
limits:
cpu: 800m
memory: 1Gi
requests:
cpu: 400m
memory: 500Mi
ports:
- name: agent-port
hostPort: 8080
containerPort: 8080
volumeMounts:
- mountPath: /var/run/docker.sock
name: dockersock
- mountPath: /usr/bin/docker
name: dockerclient
- mountPath: /usr/lib64/libltdl.so.7
name: libltdl
volumes:
- hostPath:
path: /var/run/docker.sock
name: dockersock
- hostPath:
path: /usr/bin/docker
name: dockerclient
- hostPath:
path: /usr/lib64/libltdl.so.7.3.0
name: libltdlOpen the URL like http://localhost:8080?containerId=c28 in web browser.
GoTTY Client is a terminal client for GoTTY. It can also be used as a terminal client for DockerTTY.
$ ./gotty-client http://localhost:8080?containerId=c28GoTTY uses hterm to run a JavaScript based terminal on web browsers. GoTTY itself provides a websocket server that simply relays output from the TTY to clients and receives input from clients and forwards it to the TTY. This hterm + websocket idea is inspired by Wetty.
The MIT License
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