basic config generator from prompt

.gitignore

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+.venv
+*.pyc
+__pycache__
+.vscode
+clusters.json

README.md

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+# Nginx configurator (patent for that name is pending...)

clusters.json.example

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+{
+    "clusters":[
+        {
+            "name":"dummy1",
+            "nodes": [
+                "10.0.0.1",
+                "10.0.0.2",
+                "10.0.0.3"
+            ]
+        },
+        {
+            "name":"dummy2",
+            "nodes": [
+                "127.0.0.1",
+                "127.0.0.2"
+            ]
+        }
+    ]
+ }

n-gen.py

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+import json
+import pyinputplus as pyip
+
+# Get clusters from json config
+with open("clusters.json") as json_file:
+    CLUSTERS = json.load(json_file)["clusters"]
+
+# Setup Jinja2
+from jinja2 import Environment, PackageLoader, select_autoescape
+jin = Environment(loader=PackageLoader("n-gen"), autoescape=select_autoescape())
+
+# ID of next config - TBD
+CONF_ID = 1
+
+def get_domains():
+    new_domain = True
+    domains = []
+    while new_domain:
+        domain = pyip.inputStr("Enter a full domain name: ")
+        domains.append(domain)
+        next_domain = pyip.inputYesNo("Do you want to add another domain? (y/n) ")
+        if next_domain == "no":
+            new_domain = False
+    return domains
+
+
+def get_upstreams(clusters):
+    print("\nNow, we will select upstream server(s).")
+    if (
+        pyip.inputYesNo(
+            "Is the service located on existing upstream cluster (like Swarm)? (y/n) "
+        )
+        == "yes"
+    ):
+        cluster_list = [d["name"] for d in clusters]
+        sel_cluster_name = pyip.inputMenu(cluster_list, lettered=True, blank=True)
+        cluster = [
+            element for element in clusters if element["name"] == sel_cluster_name
+        ][0]
+        print("Selected cluster " + cluster["name"] + " with nodes:")
+        for node in cluster["nodes"]:
+            print(node)
+        return cluster["nodes"]
+    else:
+        new_upstream = True
+        upstreams = []
+        while new_upstream:
+            upstream = pyip.inputStr("Enter IPv4 address of one upstream server: ")
+            upstreams.append(upstream)
+            next_upstream = pyip.inputYesNo(
+                "Do you want to add another upstream server? (y/n) "
+            )
+            if next_upstream == "no":
+                new_upstream = False
+        return upstreams
+
+
+def get_port():
+    return pyip.inputInt(
+        "\nEnter a port number for the upstream servers: ", min=81, max=65534
+    )
+
+
+def get_proto():
+    print("\nEnter the upstream protocol (between service and reverse proxy)")
+    return pyip.inputMenu(["http://", "https://"], lettered=True)
+
+
+def input_check(domains, upstreams, port, proto):
+    print("\n-----------------------------------------------")
+    print("You have entered following service information:")
+    print("Domains:")
+    for domain in domains:
+        print("\t" + domain)
+
+    print("Upstream servers with proto and port:")
+    for upstream in upstreams:
+        print("\t" + proto + upstream + ":" + str(port))
+
+    if pyip.inputYesNo("Is this information correct? (y/n) ") == "yes":
+        return True
+    else:
+        print("Sorry to hear that, please start again. Exiting")
+        exit()
+
+
+def fill_template(id, domains, upstreams, port, proto):
+    template = jin.get_template("nginx-site.conf")
+    return template.render(
+        id=id, domains=domains, upstreams=upstreams, port=port, proto=proto
+    )
+
+
+def main():
+    print("This script will generate nginx configuration and for new service.\n")
+    domains = get_domains()
+    upstreams = get_upstreams(CLUSTERS)
+    port = get_port()
+    proto = get_proto()
+    input_check(domains, upstreams, port, proto)
+    print(fill_template(CONF_ID, domains, upstreams, port, proto))
+
+
+# def test():
+#     print(fill_template("1110", ['nolog.cz', 'www.nolog.cz'], ['10.0.0.1', '10.0.0.2'], 80, 'https://'))
+
+if __name__ == "__main__":
+    main()
+    # test()

requirements.txt

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+pyinputplus
+Jinja2

templates/nginx-site.conf

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+# ID: {{ id }}
+# Service configured by nxa.py
+
+upstream up_{{ id }} {
+{%- for upstream in upstreams %}
+    server {{ upstream }}:{{ port }};
+{%- endfor %}
+}
+
+server {
+    server_name{% for domain in domains %} {{ domain }}{% endfor %}; # AUTOSSL > {{ id }}
+
+    listen      80;
+    listen      [::]:80;
+
+    # ssl
+    include /etc/autossl/gen/{{ id }}.conf;
+
+    # logging
+    include include/logging-nolog.conf;	# Change to "logging-debug" if needed
+
+    # gzip compression
+    include include/gzip.conf;
+
+    # security headers
+    include include/security-headers.conf;
+
+    # reverse proxy
+    location / {
+	proxy_pass {{ proto }}up_{{ id }};
+	include include/proxy-headers.conf;
+    }
+
+}