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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 [email protected]: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