From c79e0b4e8e14141394babbcd1e835858d066dc30 Mon Sep 17 00:00:00 2001
From: Kris Lamoureux <kris@lamoureux.io>
Date: Thu, 2 Nov 2023 21:47:31 -0400
Subject: [PATCH] Add my SSH forwarding script and a Vagrantfile

---
 .gitignore     |   1 +
 README.md      |   6 +++
 Vagrantfile    |  12 ++++++
 forward-ssh.sh | 105 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 124 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 Vagrantfile
 create mode 100755 forward-ssh.sh

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8000dd9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.vagrant
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f6f838a
--- /dev/null
+++ b/README.md
@@ -0,0 +1,6 @@
+# Traefik Testing
+
+Run test:
+```shell
+vagrant destroy -f && vagrant up && sudo ./forward-ssh.sh
+```
diff --git a/Vagrantfile b/Vagrantfile
new file mode 100644
index 0000000..d41b9a2
--- /dev/null
+++ b/Vagrantfile
@@ -0,0 +1,12 @@
+Vagrant.configure("2") do |config|
+  config.vm.box = "debian/bookworm64"
+  config.vm.provision "shell", inline: <<-SHELL
+    set -xe
+    apt-get update
+    apt-get install -y curl
+    curl -fsSL https://get.docker.com | sh
+    docker swarm init
+    cd /vagrant || exit 1
+    docker compose up -d
+  SHELL
+end
diff --git a/forward-ssh.sh b/forward-ssh.sh
new file mode 100755
index 0000000..0e411b7
--- /dev/null
+++ b/forward-ssh.sh
@@ -0,0 +1,105 @@
+#!/bin/bash
+
+# Copyright (C) 2023  Kris Lamoureux
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, version 3 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Finds the SSH private key under ./.vagrant and connects to
+# the Vagrant box, port forwarding localhost ports: 8443, 80, 443
+
+# Root check
+if [ "$EUID" -ne 0 ]; then
+  echo "[ERROR]: Please run script as root"
+  exit 1
+fi
+
+# Clean environment
+unset PRIVATE_KEY
+unset HOST_IP
+unset MATCH_PATTERN
+unset PKILL_ANSWER
+
+# Function to create the SSH tunnel
+function ssh_connect {
+  read -rp "Start a new vagrant SSH tunnel? [y/N] " PSTART_ANSWER
+  echo
+  case "$PSTART_ANSWER" in
+    [yY])
+      printf "[INFO]: Starting new vagrant SSH tunnel on PID "
+      sudo -u "$USER" ssh -fNT -i "$PRIVATE_KEY" \
+        -L 22:localhost:22 \
+        -L 80:localhost:80 \
+        -L 443:localhost:443 \
+        -L 8443:localhost:8443 \
+        -o UserKnownHostsFile=/dev/null \
+        -o StrictHostKeyChecking=no \
+        vagrant@"$HOST_IP" 2>/dev/null
+      sleep 2
+      pgrep -f "$MATCH_PATTERN"
+      ;;
+    *)
+      echo "[INFO]: Delined to start a new vagrant SSH tunnel"
+      exit 0
+      ;;
+  esac
+}
+
+# Check for valid PRIVATE_KEY location
+PRIVATE_KEY="$(find .vagrant -name "private_key" 2>/dev/null)"
+if ! ssh-keygen -l -f "$PRIVATE_KEY" &>/dev/null; then
+  echo "[ERROR]: The SSH key '$PRIVATE_KEY' is not valid. Is your virtual machine running?"
+  exit 1
+fi
+echo "[CHECK]: Valid key at $PRIVATE_KEY"
+
+# Grab first IP or use whatever HOST_IP_FIELD is set to and check that the guest is up
+HOST_IP="$(vagrant ssh -c "hostname -I | cut -d' ' -f${HOST_IP_FIELD:-1}" 2>/dev/null)"
+HOST_IP="${HOST_IP::-1}" # trim
+if ! ping -c 1 "$HOST_IP" &>/dev/null; then
+  echo "[ERROR]: Cannot ping the host IP '$HOST_IP'"
+  exit 1
+fi
+echo "[CHECK]: Host at $HOST_IP is up"
+
+# Pattern for matching processes running
+MATCH_PATTERN="ssh -fNT -i ${PRIVATE_KEY}.*vagrant@"
+
+# Check amount of processes that match the pattern
+if [ "$(pgrep -afc "$MATCH_PATTERN")" -eq 0 ]; then
+  ssh_connect
+else
+  # Processes found, so prompt to kill remaining ones then start tunnel
+  printf "\n[WARNING]: Found processes running:\n"
+  pgrep -fa "$MATCH_PATTERN"
+  printf '\n'
+  read -rp "Would you like to kill these processes? [y/N] " PKILL_ANSWER
+  echo
+  case "$PKILL_ANSWER" in
+    [yY])
+      echo "[WARNING]: Killing old vagrant SSH tunnel(s): "
+      pgrep -f "$MATCH_PATTERN" | tee >(xargs kill -15)
+      echo
+      if [ "$(pgrep -afc "$MATCH_PATTERN")" -eq 0 ]; then
+        ssh_connect
+      else
+        echo "[ERROR]: Unable to kill processes:"
+        pgrep -f "$MATCH_PATTERN"
+        exit 1
+      fi
+      ;;
+    *)
+      echo "[INFO]: Declined to kill existing processes"
+      exit 0
+      ;;
+  esac
+fi