Merge branch 'master' into daemon-spacesdaemon-spaces

15 files changed, 1196 insertions, 3 deletions

diff --git a/.gitignore b/.gitignore
index 3f5c4b284..a1a3040c9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,7 +52,6 @@ src/meck/
 src/mochiweb/
 src/oauth/
 src/rebar/
-src/setup/
 src/snappy/
 tmp/
 
diff --git a/rebar.config.script b/rebar.config.script
index 4f6f82def..7d9b7feb5 100644
--- a/rebar.config.script
+++ b/rebar.config.script
@@ -41,6 +41,7 @@ SubDirs = [
     "src/mango",
     "src/mem3",
     "src/rexi",
+    "src/setup",
     "rel"
 ],
 
@@ -51,7 +52,6 @@ DepDescs = [
 {ets_lru,          "ets-lru",          {tag, "1.0.0"}},
 {khash,            "khash",            {tag, "1.0.1"}},
 {snappy,           "snappy",           {tag, "CouchDB-1.0.0"}},
-{setup,            "setup",            {tag, "1.0.1"}},
 {ioq,              "ioq",              {tag, "1.0.1"}},
 
 %% Non-Erlang deps
@@ -100,7 +100,7 @@ AddConfig = [
         {plt_location, COUCHDB_ROOT},
         {plt_extra_apps, [
             asn1, bcrypt, compiler, crypto, inets, kernel, os_mon, runtime_tools,
-            sasl, ssl, stdlib, syntax_tools, xmerl]},
+            sasl, setup, ssl, stdlib, syntax_tools, xmerl]},
         {warnings, [unmatched_returns, error_handling, race_conditions]}]},
     {post_hooks, [{compile, "escript support/build_js.escript"}]}
 ],
diff --git a/src/setup/.gitignore b/src/setup/.gitignore
new file mode 100644
index 000000000..f84f14c93
--- /dev/null
+++ b/src/setup/.gitignore
@@ -0,0 +1,4 @@
+ebin
+.rebar
+*~
+*.swp
diff --git a/src/setup/LICENSE b/src/setup/LICENSE
new file mode 100644
index 000000000..94ad231b8
--- /dev/null
+++ b/src/setup/LICENSE
@@ -0,0 +1,203 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright {yyyy} {name of copyright owner}
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
diff --git a/src/setup/README.md b/src/setup/README.md
new file mode 100644
index 000000000..e30c40027
--- /dev/null
+++ b/src/setup/README.md
@@ -0,0 +1,193 @@
+This module implements /_cluster_setup and manages the setting up, duh, of a CouchDB cluster.
+
+### Testing
+
+```bash
+git clone https://git-wip-us.apache.org/repos/asf/couchdb.git
+cd couchdb
+git checkout setup
+./configure
+make
+dev/run --no-join -n 2 --admin a:b
+```
+
+Then, in a new terminal:
+
+    $ src/setup/test/t.sh
+
+Before running each test, kill the `dev/run` script, then reset the
+CouchDB instances with:
+
+    $ rm -rf dev/lib/ dev/logs/
+    $ dev/run --no-join -n 2 --admin a:b
+
+before running the next shell script.
+
+The Plan:
+
+N. End User Action
+- What happens behind the scenes.
+
+
+1. Launch CouchDB with `$ couchdb`, or init.d, or any other way, exactly
+like it is done in 1.x.x.
+- CouchDB launches and listens on 127.0.0.1:5984
+
+From here on, there are two paths, one is via Fauxton (a) the other is
+using a HTTP endpoint (b). Fauxton just uses the HTTP endpoint in (b).
+(b) can be used to set up a cluster programmatically.
+
+When using (b) you POST HTTP requests with a JSON request body (the request content type has to be set to application/json).
+
+If you have already setup a server admin account, you might need to pass the credentials to the HTTP calls using HTTP basic authentication.
+Alternativaly, if you use the cURL command you can can add username and password inline, like so:
+
+```
+curl -X PUT "http://admin:password@127.0.0.1:5984/mydb"
+```
+
+2.a. Go to Fauxton. There is a “Cluster Setup” tab in the sidebar. Go
+to the tab and get presented with a form that asks you to enter an admin
+username, admin password and optionally a bind_address and port to bind
+to publicly. Submit the form with the [Enable Cluster] button.
+
+If this is a single node install that already has an admin set up, there
+is no need to ask for admin credentials here. If the bind_address is !=
+127.0.0.1, we can skip this entirely and Fauxton can show the add_node
+UI right away.
+
+- POST a JSON entity to /_cluster_setup, the entity looks like:  
+```
+{
+  "action":"enable_cluster",
+  "username":"username",
+  "password":"password",
+  "bind_address":"0.0.0.0",
+  "port": 5984
+}
+```
+
+This sets up the admin user on the current node and binds to 0.0.0.0:5984
+or the specified ip:port. Logs admin user into Fauxton automatically.
+
+2.b. POST to /_cluster_setup as shown above.
+
+Repeat on all nodes.
+- keep the same username/password everywhere.
+
+
+3. Pick any one node, for simplicity use the first one, to be the
+“setup coordination node”.
+- this is a “master” node that manages the setup and requires all
+  other nodes to be able to see it and vice versa. Setup won’t work
+  with unavailable nodes (duh). The notion of “master” will be gone
+  once the setup is finished. At that point, the system has no
+  master node. Ignore I ever said “master”.
+
+a. Go to Fauxton / Cluster Setup, once we have enabled the cluster, the
+UI shows an “Add Node” interface with the fields admin, and node:
+- POST a JSON entity to /_cluster_setup, the entity looks like:
+```
+{
+  "action":"add_node",
+  "username":"username",
+  "password":"password",
+  "host":"192.168.1.100",
+  ["port": 5984],
+  "name": "node1"  // as in “node1@hostname”, same as in vm.args
+}
+```
+
+In the example above, this adds the node with IP address 192.168.1.100 to the cluster.
+
+b. as in a, but without the Fauxton bits, just POST to /_cluster_setup
+- this request will do this:
+ - on the “setup coordination node”:
+  - check if we have an Erlang Cookie Secret. If not, generate
+    a UUID and set the erlang cookie to to that UUID.
+    - store the cookie in config.ini, re-set_cookie() on startup.
+  - make a POST request to the node specified in the body above
+    using the admin credentials in the body above:
+    POST to http://username:password@node_b:5984/_cluster_setup with:
+```
+    {
+      "action": "receive_cookie",
+      "cookie": "<secretcookie>",
+    }
+```
+
+  - when the request to node B returns, we know the Erlang-level
+    inter-cluster communication is enabled and we can start adding
+    the node on the CouchDB level. To do that, the “setup
+    coordination node” does this to it’s own HTTP endpoint:
+    PUT /nodes/node_b:5984 or the same thing with internal APIs.
+
+- Repeat for all nodes.
+- Fauxton keeps a list of all set up nodes for users to see.
+
+
+4.a. When all nodes are added, click the [Finish Cluster Setup] button
+in Fauxton.
+- this does POST /_cluster_setup
+```
+  {
+    "action": "finish_cluster"
+  }
+```
+
+b. Same as in a.
+
+- this manages the final setup bits, like creating the _users,
+  _replicator and _metadata, _db_updates endpoints and
+  whatever else is needed. // TBD: collect what else is needed.
+
+
+## The Setup Endpoint
+
+This is not a REST-y endpoint, it is a simple state machine operated
+by HTTP POST with JSON bodies that have an `action` field.
+
+### State 1: No Cluster Enabled
+
+This is right after starting a node for the first time, and any time
+before the cluster is enabled as outlined above.
+
+```
+GET /_cluster_setup
+{"state": "cluster_disabled"}
+
+POST /_cluster_setup {"action":"enable_cluster"...} -> Transition to State 2
+POST /_cluster_setup {"action":"enable_cluster"...} with empty admin user/pass or invalid host/post or host/port not available -> Error
+POST /_cluster_setup {"action":"anything_but_enable_cluster"...} -> Error
+```
+
+### State 2: Cluster enabled, admin user set, waiting for nodes to be added.
+
+```
+GET /_cluster_setup
+{"state":"cluster_enabled","nodes":[]}
+
+POST /_cluster_setup {"action":"enable_cluster"...} -> Error
+POST /_cluster_setup {"action":"add_node"...} -> Stay in State 2, but return "nodes":["node B"}] on GET
+POST /_cluster_setup {"action":"add_node"...} -> if target node not available, Error
+POST /_cluster_setup {"action":"finish_cluster"} with no nodes set up -> Error
+POST /_cluster_setup {"action":"finish_cluster"} -> Transition to State 3
+POST /_cluster_setup {"action":"delete_node"...} -> Stay in State 2, but delete node from /nodes, reflect the change in GET /_cluster_setup
+POST /_cluster_setup {"action":"delete_node","node":"unknown"} -> Error Unknown Node
+```
+
+### State 3: Cluster set up, all nodes operational
+
+```
+GET /_cluster_setup
+{"state":"cluster_finished","nodes":["node a", "node b", ...]}
+
+POST /_cluster_setup {"action":"enable_cluster"...} -> Error
+POST /_cluster_setup {"action":"finish_cluster"...} -> Stay in State 3, do nothing
+POST /_cluster_setup {"action":"add_node"...} -> Error
+POST /_cluster_setup?i_know_what_i_am_doing=true {"action":"add_node"...} -> Add node, stay in State 3.
+POST /_cluster_setup {"action":"delete_node"...} -> Stay in State 3, but delete node from /nodes, reflect the change in GET /_cluster_setup
+POST /_cluster_setup {"action":"delete_node","node":"unknown"} -> Error Unknown Node
+```
+
+// TBD: we need to persist the setup state somewhere.
diff --git a/src/setup/src/setup.app.src b/src/setup/src/setup.app.src
new file mode 100644
index 000000000..ae685c971
--- /dev/null
+++ b/src/setup/src/setup.app.src
@@ -0,0 +1,27 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+% http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+{application, setup,
+ [
+  {description, ""},
+  {vsn, "1"},
+  {registered, []},
+  {applications, [
+                  kernel,
+                  stdlib,
+                  couch_epi,
+                  chttpd,
+                  couch_log
+                 ]},
+  {mod, { setup_app, []}},
+  {env, []}
+ ]}.
diff --git a/src/setup/src/setup.erl b/src/setup/src/setup.erl
new file mode 100644
index 000000000..943318675
--- /dev/null
+++ b/src/setup/src/setup.erl
@@ -0,0 +1,289 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+% http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+-module(setup).
+
+-export([enable_cluster/1, finish_cluster/1, add_node/1, receive_cookie/1]).
+-export([is_cluster_enabled/0, has_cluster_system_dbs/1, cluster_system_dbs/0]).
+-export([enable_single_node/1, is_single_node_enabled/1]).
+
+-include_lib("../couch/include/couch_db.hrl").
+
+
+require_admins(undefined, {undefined, undefined}) ->
+    % no admin in CouchDB, no admin in request
+    throw({error, "Cluster setup requires admin account to be configured"});
+require_admins(_,_) ->
+    ok.
+
+require_node_count(undefined) ->
+    throw({error, "Cluster setup requires node_count to be configured"});
+require_node_count(_) ->
+    ok.
+
+error_bind_address() ->
+    throw({error, "Cluster setup requires bind_addres != 127.0.0.1"}).
+
+require_bind_address("127.0.0.1", undefined) ->
+    error_bind_address();
+require_bind_address("127.0.0.1", <<"127.0.0.1">>) ->
+    error_bind_address();
+require_bind_address(_, _) ->
+    ok.
+
+is_cluster_enabled() ->
+    % bind_address != 127.0.0.1 AND admins != empty
+    BindAddress = config:get("chttpd", "bind_address"),
+    Admins = config:get("admins"),
+    case {BindAddress, Admins} of
+        {"127.0.0.1", _} -> false;
+        {_,[]} -> false;
+        {_,_} -> true
+    end.
+
+is_single_node_enabled(Dbs) ->
+    % admins != empty AND dbs exist
+    Admins = config:get("admins"),
+    HasDbs = has_cluster_system_dbs(Dbs),
+    case {Admins, HasDbs} of
+        {[], _} -> false;
+        {_, false} -> false;
+        {_,_} -> true
+    end.
+
+cluster_system_dbs() ->
+    ["_users", "_replicator", "_global_changes"].
+
+
+has_cluster_system_dbs([]) ->
+    true;
+has_cluster_system_dbs([Db|Dbs]) ->
+    case catch fabric:get_db_info(Db) of
+        {ok, _} -> has_cluster_system_dbs(Dbs);
+        _ -> false
+    end.
+
+enable_cluster(Options) ->
+
+    case couch_util:get_value(remote_node, Options, undefined) of
+        undefined ->
+            enable_cluster_int(Options, is_cluster_enabled());
+        _ ->
+            enable_cluster_http(Options)
+    end.
+
+get_remote_request_options(Options) ->
+    case couch_util:get_value(remote_current_user, Options, undefined) of
+        undefined ->
+            [];
+        _ ->
+            [
+                {basic_auth, {
+                    binary_to_list(couch_util:get_value(remote_current_user, Options)),
+                    binary_to_list(couch_util:get_value(remote_current_password, Options))
+                }}
+            ]
+    end.
+
+enable_cluster_http(Options) ->
+    % POST to nodeB/_setup
+    RequestOptions = get_remote_request_options(Options),
+    AdminUsername = couch_util:get_value(username, Options),
+    AdminPasswordHash = config:get("admins", binary_to_list(AdminUsername)),
+
+    Body = ?JSON_ENCODE({[
+        {<<"action">>, <<"enable_cluster">>},
+        {<<"username">>, AdminUsername},
+        {<<"password_hash">>, ?l2b(AdminPasswordHash)},
+        {<<"bind_address">>, couch_util:get_value(bind_address, Options)},
+        {<<"port">>, couch_util:get_value(port, Options)},
+        {<<"node_count">>, couch_util:get_value(node_count, Options)}
+    ]}),
+
+    Headers = [
+        {"Content-Type","application/json"}
+    ],
+
+    RemoteNode = couch_util:get_value(remote_node, Options),
+    Port = get_port(couch_util:get_value(port, Options, 5984)),
+
+    Url = binary_to_list(<<"http://", RemoteNode/binary, ":", Port/binary, "/_cluster_setup">>),
+
+    case ibrowse:send_req(Url, Headers, post, Body, RequestOptions) of
+        {ok, "201", _, _} ->
+            ok;
+        Else ->
+            couch_log:notice("send_req: ~p~n", [Else]),
+            {error, Else}
+    end.
+
+enable_cluster_int(_Options, true) ->
+    {error, cluster_enabled};
+enable_cluster_int(Options, false) ->
+
+    % if no admin in config and no admin in req -> error
+    CurrentAdmins = config:get("admins"),
+    NewCredentials = {
+        proplists:get_value(username, Options),
+        case proplists:get_value(password_hash, Options) of
+          undefined -> proplists:get_value(password, Options);
+          Pw -> Pw
+        end
+    },
+    ok = require_admins(CurrentAdmins, NewCredentials),
+    % if bind_address == 127.0.0.1 and no bind_address in req -> error
+    CurrentBindAddress = config:get("chttpd","bind_address"),
+    NewBindAddress = proplists:get_value(bind_address, Options),
+    ok = require_bind_address(CurrentBindAddress, NewBindAddress),
+    NodeCount = couch_util:get_value(node_count, Options),
+    ok = require_node_count(NodeCount),
+    Port = proplists:get_value(port, Options),
+
+    setup_node(NewCredentials, NewBindAddress, NodeCount, Port),
+    couch_log:notice("Enable Cluster: ~p~n", [Options]).
+
+set_admin(Username, Password) ->
+    config:set("admins", binary_to_list(Username), binary_to_list(Password)).
+
+setup_node(NewCredentials, NewBindAddress, NodeCount, Port) ->
+    case NewCredentials of
+        {undefined, undefined} ->
+            ok;
+        {Username, Password} ->
+            set_admin(Username, Password)
+    end,
+
+    case NewBindAddress of
+        undefined ->
+            config:set("chttpd", "bind_address", "0.0.0.0");
+        NewBindAddress ->
+            config:set("chttpd", "bind_address", binary_to_list(NewBindAddress))
+    end,
+
+    % for single node setups, set n=1, for larger setups, don’t
+    % exceed n=3 as a default
+    config:set_integer("cluster", "n", min(NodeCount, 3)),
+
+    case Port of
+        undefined ->
+            ok;
+        Port when is_binary(Port) ->
+            config:set("chttpd", "port", binary_to_list(Port));
+        Port when is_integer(Port) ->
+            config:set_integer("chttpd", "port", Port)
+    end.
+
+
+finish_cluster(Options) ->
+    Dbs = proplists:get_value(ensure_dbs_exist, Options, cluster_system_dbs()),
+    finish_cluster_int(Dbs, has_cluster_system_dbs(Dbs)).
+
+finish_cluster_int(_Dbs, true) ->
+    {error, cluster_finished};
+finish_cluster_int(Dbs, false) ->
+    lists:foreach(fun fabric:create_db/1, Dbs).
+
+
+enable_single_node(Options) ->
+    % if no admin in config and no admin in req -> error
+    CurrentAdmins = config:get("admins"),
+    NewCredentials = {
+        proplists:get_value(username, Options),
+        case proplists:get_value(password_hash, Options) of
+          undefined -> proplists:get_value(password, Options);
+          Pw -> Pw
+        end
+    },
+    ok = require_admins(CurrentAdmins, NewCredentials),
+    % skip bind_address validation, anything is fine
+    NewBindAddress = proplists:get_value(bind_address, Options),
+    Port = proplists:get_value(port, Options),
+
+    setup_node(NewCredentials, NewBindAddress, 1, Port),
+    Dbs = proplists:get_value(ensure_dbs_exist, Options, cluster_system_dbs()),
+    finish_cluster_int(Dbs, has_cluster_system_dbs(Dbs)),
+    couch_log:notice("Enable Single Node: ~p~n", [Options]).
+
+
+add_node(Options) ->
+    add_node_int(Options, is_cluster_enabled()).
+
+add_node_int(_Options, false) ->
+    {error, cluster_not_enabled};
+add_node_int(Options, true) ->
+    couch_log:notice("add node_int: ~p~n", [Options]),
+    ErlangCookie = erlang:get_cookie(),
+
+    % POST to nodeB/_setup
+    RequestOptions = [
+        {basic_auth, {
+            binary_to_list(proplists:get_value(username, Options)),
+            binary_to_list(proplists:get_value(password, Options))
+        }}
+    ],
+
+    Body = ?JSON_ENCODE({[
+        {<<"action">>, <<"receive_cookie">>},
+        {<<"cookie">>, atom_to_binary(ErlangCookie, utf8)}
+    ]}),
+
+    Headers = [
+        {"Content-Type","application/json"}
+    ],
+
+    Host = proplists:get_value(host, Options),
+    Port = get_port(proplists:get_value(port, Options, 5984)),
+    Name = proplists:get_value(name, Options, get_default_name(Port)),
+
+    Url = binary_to_list(<<"http://", Host/binary, ":", Port/binary, "/_cluster_setup">>),
+
+    case ibrowse:send_req(Url, Headers, post, Body, RequestOptions) of
+        {ok, "201", _, _} ->
+            % when done, PUT :5986/nodes/nodeB
+            create_node_doc(Host, Name);
+        Else ->
+            couch_log:notice("send_req: ~p~n", [Else]),
+            Else
+    end.
+
+get_port(Port) when is_integer(Port) ->
+    list_to_binary(integer_to_list(Port));
+get_port(Port) when is_list(Port) ->
+    list_to_binary(Port);
+get_port(Port) when is_binary(Port) ->
+    Port.
+
+create_node_doc(Host, Name) ->
+    {ok, Db} = couch_db:open_int(<<"_nodes">>, []),
+    Doc = {[{<<"_id">>, <<Name/binary, "@", Host/binary>>}]},
+    Options = [],
+    CouchDoc = couch_doc:from_json_obj(Doc),
+
+    couch_db:update_doc(Db, CouchDoc, Options).
+
+get_default_name(Port) ->
+    case Port of
+        % shortcut for easier development
+        <<"15984">> ->
+            <<"node1">>;
+        <<"25984">> ->
+            <<"node2">>;
+        <<"35984">> ->
+            <<"node3">>;
+        % by default, all nodes have the user `couchdb`
+        _ ->
+            <<"couchdb">>
+    end.
+
+receive_cookie(Options) ->
+    Cookie = proplists:get_value(cookie, Options),
+    erlang:set_cookie(node(), binary_to_atom(Cookie, latin1)).
diff --git a/src/setup/src/setup_app.erl b/src/setup/src/setup_app.erl
new file mode 100644
index 000000000..330450131
--- /dev/null
+++ b/src/setup/src/setup_app.erl
@@ -0,0 +1,28 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+% http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+-module(setup_app).
+
+-behaviour(application).
+
+%% Application callbacks
+-export([start/2, stop/1]).
+
+%% ===================================================================
+%% Application callbacks
+%% ===================================================================
+
+start(_StartType, _StartArgs) ->
+    setup_sup:start_link().
+
+stop(_State) ->
+    ok.
diff --git a/src/setup/src/setup_epi.erl b/src/setup/src/setup_epi.erl
new file mode 100644
index 000000000..c3f2636f0
--- /dev/null
+++ b/src/setup/src/setup_epi.erl
@@ -0,0 +1,49 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+% http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+
+-module(setup_epi).
+
+-behaviour(couch_epi_plugin).
+
+-export([
+    app/0,
+    providers/0,
+    services/0,
+    data_subscriptions/0,
+    data_providers/0,
+    processes/0,
+    notify/3
+]).
+
+app() ->
+    setup.
+
+providers() ->
+    [
+         {chttpd_handlers, setup_httpd_handlers}
+    ].
+
+services() ->
+    [].
+
+data_subscriptions() ->
+    [].
+
+data_providers() ->
+    [].
+
+processes() ->
+    [].
+
+notify(_Key, _Old, _New) ->
+    ok.
diff --git a/src/setup/src/setup_httpd.erl b/src/setup/src/setup_httpd.erl
new file mode 100644
index 000000000..f4e05ce09
--- /dev/null
+++ b/src/setup/src/setup_httpd.erl
@@ -0,0 +1,169 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+% http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+-module(setup_httpd).
+-include_lib("couch/include/couch_db.hrl").
+
+-export([handle_setup_req/1]).
+
+handle_setup_req(#httpd{method='POST'}=Req) ->
+    ok = chttpd:verify_is_server_admin(Req),
+    couch_httpd:validate_ctype(Req, "application/json"),
+    Setup = get_body(Req),
+    couch_log:notice("Setup: ~p~n", [Setup]),
+    Action = binary_to_list(couch_util:get_value(<<"action">>, Setup, <<"missing">>)),
+    case handle_action(Action, Setup) of
+    ok ->
+        chttpd:send_json(Req, 201, {[{ok, true}]});
+    {error, Message} ->
+        couch_httpd:send_error(Req, 400, <<"bad_request">>, Message)
+    end;
+handle_setup_req(#httpd{method='GET'}=Req) ->
+    ok = chttpd:verify_is_server_admin(Req),
+    Dbs = chttpd:qs_json_value(Req, "ensure_dbs_exist", setup:cluster_system_dbs()),
+    couch_log:notice("Dbs: ~p~n", [Dbs]),
+    case erlang:list_to_integer(config:get("cluster", "n", undefined)) of
+        1 ->
+            case setup:is_single_node_enabled(Dbs) of
+                false ->
+                    chttpd:send_json(Req, 200, {[{state, single_node_disabled}]});
+                true ->
+                    chttpd:send_json(Req, 200, {[{state, single_node_enabled}]})
+            end;
+        _ ->
+            case setup:is_cluster_enabled() of
+                false ->
+                    chttpd:send_json(Req, 200, {[{state, cluster_disabled}]});
+                true ->
+                    case setup:has_cluster_system_dbs(Dbs) of
+                        false ->
+                            chttpd:send_json(Req, 200, {[{state, cluster_enabled}]});
+                        true ->
+                            chttpd:send_json(Req, 200, {[{state, cluster_finished}]})
+                    end
+            end
+    end;
+handle_setup_req(#httpd{}=Req) ->
+    chttpd:send_method_not_allowed(Req, "GET,POST").
+
+
+get_options(Options, Setup) ->
+    ExtractValues = fun({Tag, Option}, OptionsAcc) ->
+        case couch_util:get_value(Option, Setup) of
+            undefined -> OptionsAcc;
+            Value -> [{Tag, Value} | OptionsAcc]
+        end
+    end,
+    lists:foldl(ExtractValues, [], Options).
+
+handle_action("enable_cluster", Setup) ->
+    Options = get_options([
+        {username, <<"username">>},
+        {password, <<"password">>},
+        {password_hash, <<"password_hash">>},
+        {bind_address, <<"bind_address">>},
+        {port, <<"port">>},
+        {remote_node, <<"remote_node">>},
+        {remote_current_user, <<"remote_current_user">>},
+        {remote_current_password, <<"remote_current_password">>},
+        {node_count, <<"node_count">>}
+    ], Setup),
+    case setup:enable_cluster(Options) of
+        {error, cluster_enabled} ->
+            {error, <<"Cluster is already enabled">>};
+        _ -> ok
+    end;
+
+
+handle_action("finish_cluster", Setup) ->
+    couch_log:notice("finish_cluster: ~p~n", [Setup]),
+
+    Options = get_options([
+        {ensure_dbs_exist, <<"ensure_dbs_exist">>}
+    ], Setup),
+    case setup:finish_cluster(Options) of
+        {error, cluster_finished} ->
+            {error, <<"Cluster is already finished">>};
+        Else ->
+            couch_log:notice("finish_cluster: ~p~n", [Else]),
+            ok
+    end;
+
+handle_action("enable_single_node", Setup) ->
+    couch_log:notice("enable_single_node: ~p~n", [Setup]),
+
+    Options = get_options([
+        {ensure_dbs_exist, <<"ensure_dbs_exist">>},
+        {username, <<"username">>},
+        {password, <<"password">>},
+        {password_hash, <<"password_hash">>},
+        {bind_address, <<"bind_address">>},
+        {port, <<"port">>}
+    ], Setup),
+    case setup:enable_single_node(Options) of
+        {error, cluster_finished} ->
+            {error, <<"Cluster is already finished">>};
+        Else ->
+            couch_log:notice("Else: ~p~n", [Else]),
+            ok
+    end;
+
+
+handle_action("add_node", Setup) ->
+    couch_log:notice("add_node: ~p~n", [Setup]),
+
+    Options = get_options([
+        {username, <<"username">>},
+        {password, <<"password">>},
+        {host, <<"host">>},
+        {port, <<"port">>},
+        {name, <<"name">>}
+    ], Setup),
+    case setup:add_node(Options) of
+        {error, cluster_not_enabled} ->
+            {error, <<"Cluster is not enabled.">>};
+        {error, {conn_failed, {error, econnrefused}}} ->
+            {error, <<"Add node failed. Invalid Host and/or Port.">>};
+        {error, wrong_credentials} ->
+            {error, <<"Add node failed. Invalid admin credentials,">>};
+        {error, Message} ->
+            {error, Message};
+        _ -> ok
+    end;
+
+handle_action("remove_node", Setup) ->
+    couch_log:notice("remove_node: ~p~n", [Setup]);
+
+handle_action("receive_cookie", Setup) ->
+    couch_log:notice("receive_cookie: ~p~n", [Setup]),
+    Options = get_options([
+       {cookie, <<"cookie">>}
+    ], Setup),
+    case setup:receive_cookie(Options) of
+        {error, Error} ->
+            {error, Error};
+        _ -> ok
+    end;
+
+handle_action(_, _) ->
+    couch_log:notice("invalid_action: ~n", []),
+    {error, <<"Invalid Action'">>}.
+
+
+get_body(Req) ->
+    case catch couch_httpd:json_body_obj(Req) of
+    {Body} ->
+        Body;
+    Else ->
+        couch_log:notice("Body Fail: ~p~n", [Else]),
+        couch_httpd:send_error(Req, 400, <<"bad_request">>, <<"Missing JSON body'">>)
+    end.
diff --git a/src/setup/src/setup_httpd_handlers.erl b/src/setup/src/setup_httpd_handlers.erl
new file mode 100644
index 000000000..994c217e8
--- /dev/null
+++ b/src/setup/src/setup_httpd_handlers.erl
@@ -0,0 +1,22 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License.  You may obtain a copy of
+% the License at
+%
+%   http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+-module(setup_httpd_handlers).
+
+-export([url_handler/1, db_handler/1, design_handler/1]).
+
+url_handler(<<"_cluster_setup">>) -> fun setup_httpd:handle_setup_req/1;
+url_handler(_) -> no_match.
+
+db_handler(_) -> no_match.
+
+design_handler(_) -> no_match.
diff --git a/src/setup/src/setup_sup.erl b/src/setup/src/setup_sup.erl
new file mode 100644
index 000000000..b81aa3afb
--- /dev/null
+++ b/src/setup/src/setup_sup.erl
@@ -0,0 +1,38 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+% http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+-module(setup_sup).
+
+-behaviour(supervisor).
+
+%% API
+-export([start_link/0]).
+
+%% Supervisor callbacks
+-export([init/1]).
+
+%% Helper macro for declaring children of supervisor
+-define(CHILD(I, Type), {I, {I, start_link, []}, permanent, 5000, Type, [I]}).
+
+%% ===================================================================
+%% API functions
+%% ===================================================================
+
+start_link() ->
+    supervisor:start_link({local, ?MODULE}, ?MODULE, []).
+
+%% ===================================================================
+%% Supervisor callbacks
+%% ===================================================================
+
+init([]) ->
+    {ok, {{one_for_one, 5, 10}, couch_epi:register_service(setup_epi, [])}}.
diff --git a/src/setup/test/t-frontend-setup.sh b/src/setup/test/t-frontend-setup.sh
new file mode 100755
index 000000000..52056a374
--- /dev/null
+++ b/src/setup/test/t-frontend-setup.sh
@@ -0,0 +1,63 @@
+#!/bin/sh -ex
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+HEADERS="-HContent-Type:application/json"
+# show cluster state:
+curl a:b@127.0.0.1:15986/_nodes/_all_docs
+
+# Enable Cluster on node A
+curl a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"enable_cluster","username":"foo","password":"baz","bind_address":"0.0.0.0","node_count":2}' $HEADERS
+
+# Enable Cluster on node B
+curl a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"enable_cluster","remote_node":"127.0.0.1","port":"25984","remote_current_user":"a","remote_current_password":"b","username":"foo","password":"baz","bind_address":"0.0.0.0","node_count":2}' $HEADERS
+
+# Add node B on node A
+curl a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"add_node","username":"foo","password":"baz","host":"127.0.0.1","port":25984,"name":"node2"}' $HEADERS
+
+# Show cluster state:
+curl a:b@127.0.0.1:15986/_nodes/_all_docs
+
+# Show db doesn’t exist on node A
+curl a:b@127.0.0.1:15984/foo
+
+# Show db doesn’t exist on node B
+curl a:b@127.0.0.1:25984/foo
+
+# Create database (on node A)
+curl -X PUT a:b@127.0.0.1:15984/foo
+
+# Show db does exist on node A
+curl a:b@127.0.0.1:15984/foo
+
+# Show db does exist on node B
+curl a:b@127.0.0.1:25984/foo
+
+# Finish cluster
+curl a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"finish_cluster"}' $HEADERS
+
+# Show system dbs exist on node A
+curl a:b@127.0.0.1:15984/_users
+curl a:b@127.0.0.1:15984/_replicator
+curl a:b@127.0.0.1:15984/_metadata
+curl a:b@127.0.0.1:15984/_global_changes
+
+# Show system dbs exist on node B
+curl a:b@127.0.0.1:25984/_users
+curl a:b@127.0.0.1:25984/_replicator
+curl a:b@127.0.0.1:25984/_metadata
+curl a:b@127.0.0.1:25984/_global_changes
+
+# Number of nodes is set to 2
+curl a:b@127.0.0.1:25984/_node/node2@127.0.0.1/_config/cluster/n
+
+echo "YAY ALL GOOD"
diff --git a/src/setup/test/t-single-node.sh b/src/setup/test/t-single-node.sh
new file mode 100755
index 000000000..d49043773
--- /dev/null
+++ b/src/setup/test/t-single-node.sh
@@ -0,0 +1,46 @@
+#!/bin/sh -ex
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+HEADERS="-HContent-Type:application/json"
+# show cluster state:
+curl a:b@127.0.0.1:15986/_nodes/_all_docs
+curl a:b@127.0.0.1:15984/_cluster_setup
+
+# Enable Cluster on single node
+curl a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"enable_single_node","username":"foo","password":"baz","bind_address":"127.0.0.1"}' $HEADERS
+
+# Show cluster state:
+curl a:b@127.0.0.1:15986/_nodes/_all_docs
+curl a:b@127.0.0.1:15984/_all_dbs
+curl a:b@127.0.0.1:15984/_cluster_setup
+
+# Delete a database
+curl -X DELETE a:b@127.0.0.1:15984/_global_changes
+
+# Should show single_node_disabled
+curl a:b@127.0.0.1:15984/_cluster_setup
+
+# Change the check
+curl -g 'a:b@127.0.0.1:15984/_cluster_setup?ensure_dbs_exist=["_replicator","_users"]'
+
+# delete all the things
+curl -X DELETE a:b@127.0.0.1:15984/_replicator
+curl -X DELETE a:b@127.0.0.1:15984/_users
+
+# setup only creating _users
+curl -g a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"enable_single_node","username":"foo","password":"baz","bind_address":"127.0.0.1","ensure_dbs_exist":["_users"]}' $HEADERS
+
+# check it
+curl -g 'a:b@127.0.0.1:15984/_cluster_setup?ensure_dbs_exist=["_users"]'
+
+echo "YAY ALL GOOD"
diff --git a/src/setup/test/t.sh b/src/setup/test/t.sh
new file mode 100755
index 000000000..6bd74cdd7
--- /dev/null
+++ b/src/setup/test/t.sh
@@ -0,0 +1,63 @@
+#!/bin/sh -ex
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+HEADERS="-HContent-Type:application/json"
+# show cluster state:
+curl a:b@127.0.0.1:15986/_nodes/_all_docs
+
+# Enable Cluster on node A
+curl a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"enable_cluster","username":"foo","password":"baz","bind_address":"0.0.0.0","node_count":2}' $HEADERS
+
+# Enable Cluster on node B
+curl a:b@127.0.0.1:25984/_cluster_setup -d '{"action":"enable_cluster","username":"foo","password":"baz","bind_address":"0.0.0.0","node_count":2}' $HEADERS
+
+# Add node B on node A
+curl a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"add_node","username":"foo","password":"baz","host":"127.0.0.1","port":25984,"name":"node2"}' $HEADERS
+
+# Show cluster state:
+curl a:b@127.0.0.1:15986/_nodes/_all_docs
+
+# Show db doesn’t exist on node A
+curl a:b@127.0.0.1:15984/foo
+
+# Show db doesn’t exist on node B
+curl a:b@127.0.0.1:25984/foo
+
+# Create database (on node A)
+curl -X PUT a:b@127.0.0.1:15984/foo
+
+# Show db does exist on node A
+curl a:b@127.0.0.1:15984/foo
+
+# Show db does exist on node B
+curl a:b@127.0.0.1:25984/foo
+
+# Finish cluster
+curl a:b@127.0.0.1:15984/_cluster_setup -d '{"action":"finish_cluster"}' $HEADERS
+
+# Show system dbs exist on node A
+curl a:b@127.0.0.1:15984/_users
+curl a:b@127.0.0.1:15984/_replicator
+curl a:b@127.0.0.1:15984/_metadata
+curl a:b@127.0.0.1:15984/_global_changes
+
+# Show system dbs exist on node B
+curl a:b@127.0.0.1:25984/_users
+curl a:b@127.0.0.1:25984/_replicator
+curl a:b@127.0.0.1:25984/_metadata
+curl a:b@127.0.0.1:25984/_global_changes
+
+# Number of nodes is set to 2
+curl a:b@127.0.0.1:25984/_node/node2@127.0.0.1/_config/cluster/n
+
+echo "YAY ALL GOOD"