Kubernetes SSH Container Exposer

Kubernetes SSH Container Exposer registers the SSH container information in the database and helps to proxy by SSHPiper.

                                               Kubernetes
                              +------------------------------------------+
                              |                        Namespace=bob     |
                              | +----------------+ +-------------------+ |
                              | |                | |                   | |
                              | | +------------+ | | +---------------+ | |
                              | | |            | | | |               | | |
                              | | |   MySQL    | | | | SSH Container | | |
+---------+                   | | |            | | | |               | | |
|         |                   | | +------------+ | | +-------^-------+ | |
|   Bob   +--+ssh -l bob+---+ | |                | |         |         | |
|         |                 | | | +------------+ | +---------|---------+ |
+---------+                 | | | |            | |           |           |
                            +-----> SSH Piper  +-------------+           |
+---------+                 | | | |            | |           |           |
|         |                 | | | +------------+ | +---------|---------+ |
|  Alice  +--+ssh -l alice+-+ | |                | |         |         | |
|         |                   | | +------------+ | | +-------v-------+ | |
+---------+                   | | |            | | | |               | | |
                              | | |    KSCE    | | | | SSH Container | | |
                              | | |            | | | |               | | |
                              | | +------------+ | | +---------------+ | |
                              | |                | |                   | |
                              | +----------------+ +-------------------+ |
                              |                       Namespace=alice    |
                              +------------------------------------------+

Installing the Chart

To install the chart with the release name ksce:

$ git clone git@github.com:ep4/kubernetes-ssh-container-exposer.git
$ cd kubernetes-ssh-container-exposer
$ helm dep build
$ helm inspect values . > ksce.yaml
# Edit the values files
$ vim ksce.yaml
$ helm install --name ksce --values ksce.yaml .

Uninstalling the Chart

To uninstall/delete the ksce deployment:

$ helm delete ksce --purge

The command removes all the Kubernetes components associated with the chart and deletes the release.

Configuration

The following table lists the configurable parameters of the KSCE chart and their default values.

Parameter	Description	Default
image.repository	KSCE Image name	mach4/kubernetes-ssh-container-exposer
image.tag	KSCE Image tag	latest
image.pullPolicy	Image pull policy	Always
sshpiper.image.repository	SSHPiper Image name	farmer1992/sshpiperd
sshpiper.image.tag	SSHPiper Image tag	latest
sshpiper.image.pullPolicy	Image pull policy	Always
sshpiper.service.type	Kubernetes Service type	LoadBalancer
sshpiper.service.port	Kubernetes Service port	2222
mysql.mysqlRootPassword	Password for the root user.	D7W626pOqa10766fA8qQxR2F

Configuration on ssh container

# Create public and private keys to communicate between ssh container and sshpiper
$ ssh-keygen -f id_rsa
$ SSHPIPER_PRIVATE_KEY=`cat id_rsa.pub | base64`
$ SSHPIPER_PUBLIC_KEY=`cat id_rsa | base64`
$ PUBLIC_KEY=`cat $HOME/.ssh/id_rsa.pub | base64`
$ echo "
apiVersion: v1
kind: Pod
metadata:
  name: ssh-pod
  labels:
    app: ssh-pod
spec:
  containers:
    - name: ssh-pod
      image: ssh-pod:latest
      ports:
        - containerPort: 22
      volumeMounts:
        - mountPath: /root/.ssh/
          name: authorized-keys
  volumes:
  - name: authorized-keys
    secret:
      secretName: ssh-pod-sshpiper-publickey
---
apiVersion: v1
kind: Secret
metadata:
  name: ssh-pod-sshpiper-publickey
type: Opaque
data:
  authorized_keys: $SSHPIPER_PUBLIC_KEY
---
apiVersion: v1
kind: Secret
metadata:
  name: ssh-pod
type: Opaque
data:
  sshpiper_id_rsa: $SSHPIPER_PRIVATE_KEY
  downstream_id_rsa.pub: $PUBLIC_KEY
" > ssh-pod.yml
$ kubectl create -f ssh-pod.yml