diff --git a/global/overlay/etc/puppet/setup_cosmos_modules b/global/overlay/etc/puppet/setup_cosmos_modules
new file mode 100755
index 0000000..27e09f8
--- /dev/null
+++ b/global/overlay/etc/puppet/setup_cosmos_modules
@@ -0,0 +1,182 @@
+#!/usr/bin/env python3
+""" Write out a puppet cosmos-modules.conf """
+
+import hashlib
+import os
+import os.path
+import socket
+import sys
+
+try:
+ from configobj import ConfigObj
+
+ os_info = ConfigObj("/etc/os-release")
+except (IOError, ModuleNotFoundError):
+ os_info = None
+
+try:
+ fqdn = socket.getfqdn()
+ hostname = socket.gethostname()
+except OSError:
+ host_info = None
+else:
+
+ domainname = '.'.join([x for x in fqdn.split('.')[:1]])
+ hostname = fqdn.split('.')[0]
+ instance, location, environment, function, number = hostname.split('-')
+ service = fqdn.split('.')[1]
+
+ host_info = {
+ "domainname": domainname,
+ "environment": environment,
+ "fqdn": fqdn,
+ "function": function,
+ "hostname": hostname,
+ "instance": instance,
+ "location": location,
+ "number": number,
+ }
+
+
+def get_file_hash(modulesfile):
+ """
+ Based on https://github.com/python/cpython/pull/31930: should use
+ hashlib.file_digest() but it is only available in python 3.11
+ """
+ try:
+ with open(modulesfile, "rb") as fileobj:
+ digestobj = hashlib.sha256()
+ _bufsize = 2**18
+ buf = bytearray(_bufsize) # Reusable buffer to reduce allocations.
+ view = memoryview(buf)
+ while True:
+ size = fileobj.readinto(buf)
+ if size == 0:
+ break # EOF
+ digestobj.update(view[:size])
+ except FileNotFoundError:
+ return ""
+
+ return digestobj.hexdigest()
+
+
+def get_list_hash(file_lines):
+ """Get hash of list contents"""
+
+ file_lines_hash = hashlib.sha256()
+ for line in file_lines:
+ file_lines_hash.update(line)
+
+ return file_lines_hash.hexdigest()
+
+
+def create_file_content(modules):
+ """
+ Write out the expected file contents to a list so we can check the
+ expected checksum before writing anything
+ """
+ file_lines = []
+ file_lines.append("# Generated by {}\n".format( # pylint: disable=consider-using-f-string
+ os.path.basename(sys.argv[0])).encode("utf-8"))
+ for key in modules:
+ file_lines.append("{0:11} {1} {2} {3}\n".format( # pylint: disable=consider-using-f-string
+ key,
+ modules[key]["repo"],
+ modules[key]["upgrade"],
+ modules[key]["tag"],
+ ).encode("utf-8"))
+
+ return file_lines
+
+
+def main():
+ """Starting point of the program"""
+
+ modulesfile: str = "/etc/puppet/cosmos-modules.conf"
+ modulesfile_tmp: str = modulesfile + ".tmp"
+
+ modules: dict = {
+ "augeas": {
+ "repo": "https://github.com/SUNET/puppet-augeas.git",
+ "upgrade": "yes",
+ "tag": "sunet-2*",
+ },
+ "bastion": {
+ "repo": "https://github.com/SUNET/puppet-bastion.git",
+ "upgrade": "yes",
+ "tag": "sunet-2*",
+ },
+ "apparmor": {
+ "repo": "https://github.com/SUNET/puppet-apparmor.git",
+ "upgrade": "yes",
+ "tag": "sunet-2*",
+ },
+ "sunet": {
+ "repo": "https://github.com/SUNET/puppet-sunet.git",
+ "upgrade": "yes",
+ "tag": "stable-2*",
+ },
+ "nagioscfg": {
+ "repo": "https://github.com/SUNET/puppet-nagioscfg.git",
+ "upgrade": "yes",
+ "tag": "sunet-2*",
+ },
+ }
+
+ # When/if we want we can do stuff to modules here
+# if host_info:
+# if host_info["fqdn"] == "internal-tug-lab-ml-1.platform.sunet.se":
+# modules["sunet"]["tag"] = "testing-2*"
+# if host_info["fqdn"] == "internal-sto1-test-forgejo-2.platform.sunet.se":
+# modules["sunet"]["tag"] = "testing-2*"
+# if host_info["fqdn"] == "internal-sto3-test-monitor-1.platform.sunet.se":
+# modules["sunet"]["tag"] = "jocar-monitor-handle-legacy-scriptherder-2024-02-14-v10"
+# if host_info["fqdn"] == "internal-sto1-test-actrunner-1.platform.sunet.se":
+# modules["sunet"]["tag"] = "testing-2*"
+## modules["nagioscfg"]["tag"] = "*mifr-2*"
+# # modules["stdlib"] = {
+# # "tag": "sunet-2*",
+# # "upgrade": "yes",
+# "repo": "https://github.com/SUNET/puppetlabs-stdlib.git",
+# }
+# modules["apt"] = {
+# "tag": "sunet-2*",
+# "upgrade": "yes",
+# "repo": "https://github.com/SUNET/puppetlabs-apt.git",
+# }
+# modules["concat"] = {
+# "tag": "sunet-2*",
+# "upgrade": "yes",
+# "repo": "https://github.com/SUNET/puppetlabs-concat.git",
+# }
+ # if host_info:
+ # if host_info["environment"] == "test":
+ # modules["sunet"]["tag"] = "kano-mail-2*"
+ # if os_info:
+ # if os_info["ID"] == "debian" and os_info["VERSION_ID"] == "12":
+ # modules["augeas"]["repo"] = "https://github.com/SUNET/puppetlabs-augeas_core"
+ # Build list of expected file content
+ file_lines = create_file_content(modules)
+
+ # Get hash of the list
+ list_hash = get_list_hash(file_lines)
+
+ # Get hash of the existing file on disk
+ file_hash = get_file_hash(modulesfile)
+
+ # Update the file if necessary
+ if list_hash != file_hash:
+ # Since we are reading the file with 'rb' when computing our hash use 'wb' when
+ # writing so we dont end up creating a file that does not match the
+ # expected hash
+ with open(modulesfile_tmp, "wb") as fileobj:
+ for line in file_lines:
+ fileobj.write(line)
+
+ # Rename it in place so the update is atomic for anything else trying to
+ # read the file
+ os.rename(modulesfile_tmp, modulesfile)
+
+
+if __name__ == "__main__":
+ main()