init work on standalone autoconf

autoconf/Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine
+
+RUN apk add py3-pip && \
+    pip3 install docker
+
+COPY *.py /opt/
+RUN chmod +x /opt/entrypoint.py
+
+VOLUME /etc/nginx
+
+ENTRYPOINT ["/opt/entrypoint.py"]

autoconf/config.py

@@ -0,0 +1,25 @@
+#!/usr/bin/python3
+
+import utils
+import subprocess, shutil
+
+def generate(vars) :
+	vars_defaults = vars.copy()
+	vars_defaults.update(os.environ)
+	vars_defaults.update(vars)
+	subprocess.run(["/opt/entrypoint/site-config.sh", vars["SERVER_NAME"]], env=vars_defaults)
+	utils.log("Generated config for " + vars["SERVER_NAME"])
+
+def activate(vars) :
+	replace_in_file("/etc/nginx/nginx.conf", "}", "include /etc/nginx/" + vars["SERVER_NAME"] + "/server.conf;\n}")
+	subprocess.run(["/usr/sbin/nginx", "-s", "reload"])
+	utils.log("Activated config for " + vars["SERVER_NAME"])
+
+def deactivate(vars) :
+	replace_in_file("/etc/nginx/nginx.conf", "include /etc/nginx/" + vars["SERVER_NAME"] + "/server.conf;\n", "")
+	subprocess.run(["/usr/sbin/nginx", "-s", "reload"])
+	utils.log("Deactivated config for " + vars["SERVER_NAME"])
+
+def remove(vars) :
+	shutil.rmtree("/etc/nginx/" + vars["SERVER_NAME"])
+	utils.log("Removed config for " + vars["SERVER_NAME"])

autoconf/entrypoint.py

@@ -0,0 +1,57 @@
+#!/usr/bin/python3
+
+import utils, config
+import docker, os, stat, sys
+
+def process(id, event, vars) :
+	global containers
+	if event == "create" :
+		config.generate(vars)
+		containers.append(id)
+	elif event == "start" :
+		config.activate(vars)
+	elif event == "die" :
+		config.deactivate(vars)
+	elif event == "destroy" :
+		config.remove(vars)
+		containers.remove(id)
+
+# Connect to the endpoint
+endpoint = "/var/run/docker.sock"
+if not os.path.exists(endpoint) or not stat.S_ISSOCK(os.stat(endpoint).st_mode) :
+	print("[!] /var/run/docker.sock not found (is it mounted ?)")
+	sys.exit(1)
+try :
+	client = docker.DockerClient(base_url='unix:///var/run/docker.sock')
+except Exception as e :
+	print("[!] Can't instantiate DockerClient : " + str(e))
+	sys.exit(2)
+
+# Get all bunkerized-nginx instances
+instances = []
+try :
+	instances = client.containers.list(all=True, filters={"label" : "bunkerized-nginx.AUTOCONF"})
+except docker.errors.APIError as e :
+	print("[!] Docker API error " + str(e))
+	sys.exit(3)
+
+# Get all containers created before and do the config
+containers = []
+try :
+	containers_before = client.containers.list(all=True, filters={"label" : "bunkerized-nginx.SERVER_NAME"})
+except docker.errors.APIerror as e :
+	print("[!] Docker API error " + str(e))
+	sys.exit(4)
+for container in containers_before :
+	if container.status in ("restarting", "running", "created", "exited") :
+		process(container, "create")
+	if container.status in ("restarting", "running") :
+		process(container, "start")
+
+# Process events received from Docker
+try :
+	for event in client.events(decode=True) :
+		print(event)
+except docker.errors.APIerror as e :
+	print("[!] Docker API error " + str(e))
+	sys.exit(5)

autoconf/utils.py

@@ -0,0 +1,13 @@
+#!/usr/bin/python3
+
+import datetime
+
+def log(event) :
+	print("[" + str(datetime.datetime.now().replace(microsecond=0)) + "] AUTOCONF - " + event, flush=True)
+
+def replace_in_file(file, old_str, new_str) :
+	with open(file) as f :
+		data = f.read()
+	data = data[::-1].replace(old_str[::-1], new_str[::-1], 1)[::-1]
+	with open(file, "w") as f :
+		f.write(data)

entrypoint/entrypoint.sh

@@ -27,6 +27,23 @@ function trap_exit() {
 }
 trap "trap_exit" TERM INT
 
+# trap SIGHUP
+function trap_reload() {
+	echo "[*] Catched reload operation"
+	if [ -f /tmp/nginx.pid ] ; then
+		echo "[*] Reloading nginx ..."
+		/usr/sbin/nginx -s reload
+		if [ $? -eq 0 ] ; then
+			echo "[*] Reload succesfull"
+		else
+			echo "[!] Reload failed"
+		fi
+	else
+		echo "[!] Ignored reload operation because nginx is not running"
+	fi
+}
+trap "trap_reload" HUP
+
 # do the configuration magic if needed
 if [ ! -f "/opt/installed" ] ; then
 	echo "[*] Configuring bunkerized-nginx ..."