Fix running on python3

docs/FreeBSD.md

@@ -49,7 +49,7 @@ If you want to restrict address that tower listen to, run `./bin/tower-web --lis
 
 ## Prepare nodes
 
-If you had installed PostgreSQL and MongoDB previously, you have to deinstall them and clean their db paths (`/var/db/mongodb` and `/usr/local/pgsql`). On each FreeBSD node do the following: 
+If you had installed PostgreSQL and MongoDB previously, you have to deinstall them and clean their db paths (`/var/db/mongodb` and `/var/db/postgres`). On each FreeBSD node do the following: 
 
 * Enable SSH:
 ```shell

tower/models/environment.py

@@ -296,8 +296,8 @@ class Environment(Model):
 
             for n in need_cert:
                 conf = json.loads(n.config)
-                conf["cert"] = str(certificate[s]["cert"])
-                conf["cert_key"] = str(certificate[s]["key"])
+                conf["cert"] = str(certificate[s]["cert"].decode())
+                conf["cert_key"] = str(certificate[s]["key"].decode())
                 n.config = json.dumps(conf, sort_keys=True)
                 n.save()