SSH into a running container for your Cloud Foundry application, run one-off tasks, debug your app, and more.
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README.md
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README.md

cf-ssh

SSH into a running container for your Cloud Foundry application, run one-off tasks, debug your app, and more.

Initial implementation requires the application to have a manifest.yml.

Also, cf-ssh requires that you run the command from within the project source folder. It performs a cf push to create a new application based on the same source code/path, buildpack, and variables. Once CF Runtime supports copy app bits #78847148, then cf-ssh will be upgraded to use app bit copying, and not require local access to project app bits.

It is desired that cf-ssh works correctly from all platforms that support the cf CLI.

Windows is a target platform but has not yet been tested. Please give feedback in the Issues.

Requirements

This tool requires the following CLIs to be installed

It is assumed that in using cf-ssh you have already successfully targeted a Cloud Foundry API, and have pushed an application (successfully or not).

This tool also currently requires outbound internet access to the http://tmate.io/ proxies. In future, to avoid the requirement of public Internet access, it would be great to package up the tmate server as a BOSH release and deploy it into the same infrastructure as the Cloud Foundry deployment.

Why require ssh CLI?

This project is written in the Go programming language, and there is a candidate library go.crypto that could have natively supported an interactive SSH session. Unfortunately, the SSL supports a subset of ciphers that don't seem to work with tmate.io proxies [stackoverflow]

Using the go.crypto library I was getting the following error. In future, perhaps either tmate.io or go.crypto will change to support each other.

unable to connect: ssh: handshake failed: ssh: no common algorithms

Installation

Download a pre-compiled release for your platform. Place it in your $PATH or %PATH% and rename to cf-ssh (or cf-ssh.exe for Windows).

Alternately, if you have Go setup you can build it from source:

go get github.com/cloudfoundry-community/cf-ssh

Usage

cd path/to/app
cf-ssh -f manifest.yml

Publish releases

To generate the pre-compiled executables for the target platforms, using gox:

gox -output "out/{{.Dir}}_{{.OS}}_{{.Arch}}" -osarch "darwin/amd64 linux/amd64 windows/amd64 windows/386" ./...

They are now in the out folder:

-rwxr-xr-x  1 drnic  staff   4.0M Oct 25 23:05 cf-ssh_darwin_amd64
-rwxr-xr-x  1 drnic  staff   4.0M Oct 25 23:05 cf-ssh_linux_amd64
-rwxr-xr-x  1 drnic  staff   3.4M Oct 25 23:05 cf-ssh_windows_386.exe
-rwxr-xr-x  1 drnic  staff   4.2M Oct 25 23:05 cf-ssh_windows_amd64.exe
VERSION=v0.1.0
github-release release -u cloudfoundry-community -r cf-ssh -t $VERSION --name "cf-ssh $VERSION" --description 'SSH into a running container for your Cloud Foundry application, run one-off tasks, debug your app, and more.'

for arch in darwin_amd64 linux_amd64 windows_amd64 windows_386; do
  github-release upload -u cloudfoundry-community -r cf-ssh -t $VERSION --name cf-ssh_$arch --file out/cf-ssh_$arch*
done