Make irssi vps multi-user.

It was very pippijn-specific. Now we can have any number of users with
their own irssi vps.

code/kubes/vps/irssi/Dockerfile

@@ -7,6 +7,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
  locales \
  netcat \
  openssh-server \
+ rsync \
  screen \
  vim \
  && apt-get clean
@@ -18,8 +19,8 @@ RUN groupadd -r -g 1000 irssi \
 
 WORKDIR /home/irssi
 COPY init.sh /
-COPY etc /etc
-RUN echo 'AuthorizedKeysFile .ssh/authorized_keys /etc/ssh/authorized_keys' >> /etc/ssh/sshd_config \
- && chmod 644 /etc/screenrc \
+COPY etc /etc/
+COPY home /home/
+RUN chmod 644 /etc/screenrc \
  && mkdir /etc/ssh_keys
 ENTRYPOINT ["/init.sh"]

code/kubes/vps/irssi/init.sh

@@ -14,7 +14,17 @@ fi
 ln -sf /etc/ssh_keys/* /etc/ssh/
 touch /etc/ssh_keys/.stamp
 
+# Make "irssi" user accessible for the VPS owner. Run this command as the
+# irssi user, otherwise root may change file ownership.
+if [ ! -f .ssh/authorized_keys ]; then
+  echo "Copying initial home for $IRSSI_USER"
+  su - irssi -c "rsync -avrP /home/$IRSSI_USER/ /home/irssi"
+fi
+
+# Start screen for "irssi" user. It's up to the user what that does exactly,
+# but the default /etc/screenrc launches irssi.
 su - irssi -c 'screen -d -m'
+
 while true; do
   echo "Starting health endpoint"
   # TODO: implement actual health check

code/kubes/vps/irssi/irssi.yaml

@@ -34,6 +34,9 @@ spec:
         - name: irssi
           image: xinutec/irssi:latest
           imagePullPolicy: Always
+          env:
+          - name: IRSSI_USER
+            value: pippijn
           ports:
             - containerPort: 22
           resources:

code/kubes/vps/irssi/test.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -eux
+
+docker build -t xinutec/irssi:test .
+docker run \
+  --name irssi-test \
+  --rm \
+  -p 2345:22 \
+  --env IRSSI_USER=pippijn \
+  -it xinutec/irssi:test