refactor: reescreve o nomad_bootstrap.sh em pyhton

templates/nomad_bootstrap.py

@@ -0,0 +1,60 @@
+import argparse
+import textwrap
+import fileinput
+import sys
+from string import Template
+
+def server(bootstrap_expect, retry_join, nomad_path):
+    retry_join =  f'"{retry_join}"'
+    render_config(f"{nomad_path}server.hcl.tpl", "<BOOTSTRAP_EXPECT>", bootstrap_expect)
+    render_config(f"{nomad_path}server.hcl.tpl", "<RETRY_JOIN>", retry_join)
+
+def client(retry_join, nomad_path):
+    retry_join =  f'"{retry_join}"'
+    render_config(f"{nomad_path}client.hcl.tpl", "<RETRY_JOIN>", retry_join)
+
+def both(bootstrap_expect, retry_join, nomad_path):
+    retry_join = f'"{retry_join}"'
+    render_config(f"{nomad_path}server.hcl.tpl", "<BOOTSTRAP_EXPECT>", bootstrap_expect)
+    render_config(f"{nomad_path}server.hcl.tpl", "<RETRY_JOIN>", retry_join)
+    render_config(f"{nomad_path}client.hcl.tpl", "<RETRY_JOIN>", retry_join)
+
+def render_config(file, searchExp, replaceExp):
+   for line in fileinput.input(file, inplace=1):
+       line = line.replace(searchExp, str(replaceExp))
+       sys.stdout.write(line)  
+
+def validate_args(args):
+    if (args.mode == "server" or args.mode == "both")  and args.bootstrap_expect is None :
+        print("Parâmetro 'bootstrap_expect' não informado.")
+        return False
+    return True
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter,
+                                     epilog=textwrap.dedent("""
+                                        Exemplos:
+                                            Iniciar cluster local com client e servidor:
+                                                nomad_boostrap.py both -b 1
+
+                                            Iniciar cluster no GCP com cloud auto-join:
+                                                nomad_bootstrap.py server  -b 3 -r "provider=gce project_name=meu-projeto tag_value=nomad-server"
+                                                nomad_bootstrap.py client -r "provider=gce project_name=meu-projeto tag_value=nomad-server"
+                                        """))
+
+    parser.add_argument('mode', help='Modo de execução do nomad', choices=['server', 'client', 'both'])
+    parser.add_argument('--bootstrap-expect', '-b', help='Número de nodes do servidor a aguardar antes de inicializar.', type=int)
+    parser.add_argument('--retry-join', '-r', help='', type=str, default='127.0.0.1')
+    parser.add_argument('--nomad_path', help='Caminho do nomad', type=str, default='/etc/nomad.d/')
+    args = parser.parse_args()
+
+    if not validate_args(args):
+      exit(1)
+
+    if args.mode == 'server':
+      server(args.bootstrap_expect, args.retry_join, args.nomad_path)    
+    elif args.mode == 'client':
+      client(args.retry_join, args.nomad_path)
+    else:
+      both(args.bootstrap_expect, args.retry_join, args.nomad_path)
+