Merge remote-tracking branch 'origin/master' into environments-and-deployments

# Conflicts:
#	db/schema.rb

10 files changed, 574 insertions, 461 deletions

diff --git a/doc/api/README.md b/doc/api/README.md
index 27c5962decf..e3fc5a09f21 100644
--- a/doc/api/README.md
+++ b/doc/api/README.md
@@ -8,32 +8,39 @@ under [`/lib/api`](https://gitlab.com/gitlab-org/gitlab-ce/tree/master/lib/api).
 Documentation for various API resources can be found separately in the
 following locations:
 
-- [Users](users.md)
-- [Session](session.md)
-- [Projects](projects.md) including setting Webhooks
-- [Project Snippets](project_snippets.md)
-- [Services](services.md)
-- [Repositories](repositories.md)
-- [Repository Files](repository_files.md)
-- [Commits](commits.md)
-- [Tags](tags.md)
 - [Branches](branches.md)
-- [Merge Requests](merge_requests.md)
+- [Builds](builds.md)
+- [Build triggers](build_triggers.md)
+- [Build Variables](build_variables.md)
+- [Commits](commits.md)
+- [Deploy Keys](deploy_keys.md)
+- [Groups](groups.md)
 - [Issues](issues.md)
+- [Keys](keys.md)
 - [Labels](labels.md)
+- [Merge Requests](merge_requests.md)
 - [Milestones](milestones.md)
-- [Notes](notes.md) (comments)
-- [Deploy Keys](deploy_keys.md)
-- [System Hooks](system_hooks.md)
-- [Groups](groups.md)
+- [Open source license templates](licenses.md)
 - [Namespaces](namespaces.md)
-- [Settings](settings.md)
-- [Keys](keys.md)
-- [Builds](builds.md)
-- [Build triggers](build_triggers.md)
-- [Build Variables](build_variables.md)
+- [Notes](notes.md) (comments)
+- [Projects](projects.md) including setting Webhooks
+- [Project Snippets](project_snippets.md)
+- [Repositories](repositories.md)
+- [Repository Files](repository_files.md)
 - [Runners](runners.md)
-- [Open source license templates](licenses.md)
+- [Services](services.md)
+- [Session](session.md)
+- [Settings](settings.md)
+- [System Hooks](system_hooks.md)
+- [Tags](tags.md)
+- [Users](users.md)
+
+### Internal CI API
+
+The following documentation is for the [internal CI API](ci/README.md):
+
+- [Builds](ci/builds.md)
+- [Runners](ci/runners.md)
 
 ## Authentication
 
diff --git a/doc/api/builds.md b/doc/api/builds.md
index 5669bd0cdda..de998944352 100644
--- a/doc/api/builds.md
+++ b/doc/api/builds.md
@@ -21,85 +21,85 @@ Example of response
 
 ```json
 [
-    {
-        "commit": {
-            "author_email": "admin@example.com",
-            "author_name": "Administrator",
-            "created_at": "2015-12-24T16:51:14.000+01:00",
-            "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
-            "message": "Test the CI integration.",
-            "short_id": "0ff3ae19",
-            "title": "Test the CI integration."
-        },
-        "coverage": null,
-        "created_at": "2015-12-24T15:51:21.802Z",
-        "artifacts_file": {
-          "filename": "artifacts.zip",
-          "size": 1000
-        },
-        "finished_at": "2015-12-24T17:54:27.895Z",
-        "id": 7,
-        "name": "teaspoon",
-        "ref": "master",
-        "runner": null,
-        "stage": "test",
-        "started_at": "2015-12-24T17:54:27.722Z",
-        "status": "failed",
-        "tag": false,
-        "user": {
-            "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
-            "bio": null,
-            "created_at": "2015-12-21T13:14:24.077Z",
-            "id": 1,
-            "is_admin": true,
-            "linkedin": "",
-            "name": "Administrator",
-            "skype": "",
-            "state": "active",
-            "twitter": "",
-            "username": "root",
-            "web_url": "http://gitlab.dev/u/root",
-            "website_url": ""
-        }
+  {
+    "commit": {
+      "author_email": "admin@example.com",
+      "author_name": "Administrator",
+      "created_at": "2015-12-24T16:51:14.000+01:00",
+      "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+      "message": "Test the CI integration.",
+      "short_id": "0ff3ae19",
+      "title": "Test the CI integration."
+    },
+    "coverage": null,
+    "created_at": "2015-12-24T15:51:21.802Z",
+    "artifacts_file": {
+      "filename": "artifacts.zip",
+      "size": 1000
     },
-    {
-        "commit": {
-            "author_email": "admin@example.com",
-            "author_name": "Administrator",
-            "created_at": "2015-12-24T16:51:14.000+01:00",
-            "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
-            "message": "Test the CI integration.",
-            "short_id": "0ff3ae19",
-            "title": "Test the CI integration."
-        },
-        "coverage": null,
-        "created_at": "2015-12-24T15:51:21.727Z",
-        "artifacts_file": null,
-        "finished_at": "2015-12-24T17:54:24.921Z",
-        "id": 6,
-        "name": "spinach:other",
-        "ref": "master",
-        "runner": null,
-        "stage": "test",
-        "started_at": "2015-12-24T17:54:24.729Z",
-        "status": "failed",
-        "tag": false,
-        "user": {
-            "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
-            "bio": null,
-            "created_at": "2015-12-21T13:14:24.077Z",
-            "id": 1,
-            "is_admin": true,
-            "linkedin": "",
-            "name": "Administrator",
-            "skype": "",
-            "state": "active",
-            "twitter": "",
-            "username": "root",
-            "web_url": "http://gitlab.dev/u/root",
-            "website_url": ""
-        }
+    "finished_at": "2015-12-24T17:54:27.895Z",
+    "id": 7,
+    "name": "teaspoon",
+    "ref": "master",
+    "runner": null,
+    "stage": "test",
+    "started_at": "2015-12-24T17:54:27.722Z",
+    "status": "failed",
+    "tag": false,
+    "user": {
+      "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+      "bio": null,
+      "created_at": "2015-12-21T13:14:24.077Z",
+      "id": 1,
+      "is_admin": true,
+      "linkedin": "",
+      "name": "Administrator",
+      "skype": "",
+      "state": "active",
+      "twitter": "",
+      "username": "root",
+      "web_url": "http://gitlab.dev/u/root",
+      "website_url": ""
+    }
+  },
+  {
+    "commit": {
+      "author_email": "admin@example.com",
+      "author_name": "Administrator",
+      "created_at": "2015-12-24T16:51:14.000+01:00",
+      "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+      "message": "Test the CI integration.",
+      "short_id": "0ff3ae19",
+      "title": "Test the CI integration."
+    },
+    "coverage": null,
+    "created_at": "2015-12-24T15:51:21.727Z",
+    "artifacts_file": null,
+    "finished_at": "2015-12-24T17:54:24.921Z",
+    "id": 6,
+    "name": "spinach:other",
+    "ref": "master",
+    "runner": null,
+    "stage": "test",
+    "started_at": "2015-12-24T17:54:24.729Z",
+    "status": "failed",
+    "tag": false,
+    "user": {
+      "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+      "bio": null,
+      "created_at": "2015-12-21T13:14:24.077Z",
+      "id": 1,
+      "is_admin": true,
+      "linkedin": "",
+      "name": "Administrator",
+      "skype": "",
+      "state": "active",
+      "twitter": "",
+      "username": "root",
+      "web_url": "http://gitlab.dev/u/root",
+      "website_url": ""
     }
+  }
 ]
 ```
 
@@ -125,68 +125,68 @@ Example of response
 
 ```json
 [
-    {
-        "commit": {
-            "author_email": "admin@example.com",
-            "author_name": "Administrator",
-            "created_at": "2015-12-24T16:51:14.000+01:00",
-            "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
-            "message": "Test the CI integration.",
-            "short_id": "0ff3ae19",
-            "title": "Test the CI integration."
-        },
-        "coverage": null,
-        "created_at": "2016-01-11T10:13:33.506Z",
-        "artifacts_file": null,
-        "finished_at": "2016-01-11T10:14:09.526Z",
-        "id": 69,
-        "name": "rubocop",
-        "ref": "master",
-        "runner": null,
-        "stage": "test",
-        "started_at": null,
-        "status": "canceled",
-        "tag": false,
-        "user": null
+  {
+    "commit": {
+      "author_email": "admin@example.com",
+      "author_name": "Administrator",
+      "created_at": "2015-12-24T16:51:14.000+01:00",
+      "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+      "message": "Test the CI integration.",
+      "short_id": "0ff3ae19",
+      "title": "Test the CI integration."
     },
-    {
-        "commit": {
-            "author_email": "admin@example.com",
-            "author_name": "Administrator",
-            "created_at": "2015-12-24T16:51:14.000+01:00",
-            "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
-            "message": "Test the CI integration.",
-            "short_id": "0ff3ae19",
-            "title": "Test the CI integration."
-        },
-        "coverage": null,
-        "created_at": "2015-12-24T15:51:21.957Z",
-        "artifacts_file": null,
-        "finished_at": "2015-12-24T17:54:33.913Z",
-        "id": 9,
-        "name": "brakeman",
-        "ref": "master",
-        "runner": null,
-        "stage": "test",
-        "started_at": "2015-12-24T17:54:33.727Z",
-        "status": "failed",
-        "tag": false,
-        "user": {
-            "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
-            "bio": null,
-            "created_at": "2015-12-21T13:14:24.077Z",
-            "id": 1,
-            "is_admin": true,
-            "linkedin": "",
-            "name": "Administrator",
-            "skype": "",
-            "state": "active",
-            "twitter": "",
-            "username": "root",
-            "web_url": "http://gitlab.dev/u/root",
-            "website_url": ""
-        }
+    "coverage": null,
+    "created_at": "2016-01-11T10:13:33.506Z",
+    "artifacts_file": null,
+    "finished_at": "2016-01-11T10:14:09.526Z",
+    "id": 69,
+    "name": "rubocop",
+    "ref": "master",
+    "runner": null,
+    "stage": "test",
+    "started_at": null,
+    "status": "canceled",
+    "tag": false,
+    "user": null
+  },
+  {
+    "commit": {
+      "author_email": "admin@example.com",
+      "author_name": "Administrator",
+      "created_at": "2015-12-24T16:51:14.000+01:00",
+      "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+      "message": "Test the CI integration.",
+      "short_id": "0ff3ae19",
+      "title": "Test the CI integration."
+    },
+    "coverage": null,
+    "created_at": "2015-12-24T15:51:21.957Z",
+    "artifacts_file": null,
+    "finished_at": "2015-12-24T17:54:33.913Z",
+    "id": 9,
+    "name": "brakeman",
+    "ref": "master",
+    "runner": null,
+    "stage": "test",
+    "started_at": "2015-12-24T17:54:33.727Z",
+    "status": "failed",
+    "tag": false,
+    "user": {
+      "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+      "bio": null,
+      "created_at": "2015-12-21T13:14:24.077Z",
+      "id": 1,
+      "is_admin": true,
+      "linkedin": "",
+      "name": "Administrator",
+      "skype": "",
+      "state": "active",
+      "twitter": "",
+      "username": "root",
+      "web_url": "http://gitlab.dev/u/root",
+      "website_url": ""
     }
+  }
 ]
 ```
 
@@ -211,42 +211,42 @@ Example of response
 
 ```json
 {
-    "commit": {
-        "author_email": "admin@example.com",
-        "author_name": "Administrator",
-        "created_at": "2015-12-24T16:51:14.000+01:00",
-        "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
-        "message": "Test the CI integration.",
-        "short_id": "0ff3ae19",
-        "title": "Test the CI integration."
-    },
-    "coverage": null,
-    "created_at": "2015-12-24T15:51:21.880Z",
-    "artifacts_file": null,
-    "finished_at": "2015-12-24T17:54:31.198Z",
-    "id": 8,
-    "name": "rubocop",
-    "ref": "master",
-    "runner": null,
-    "stage": "test",
-    "started_at": "2015-12-24T17:54:30.733Z",
-    "status": "failed",
-    "tag": false,
-    "user": {
-        "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
-        "bio": null,
-        "created_at": "2015-12-21T13:14:24.077Z",
-        "id": 1,
-        "is_admin": true,
-        "linkedin": "",
-        "name": "Administrator",
-        "skype": "",
-        "state": "active",
-        "twitter": "",
-        "username": "root",
-        "web_url": "http://gitlab.dev/u/root",
-        "website_url": ""
-    }
+  "commit": {
+    "author_email": "admin@example.com",
+    "author_name": "Administrator",
+    "created_at": "2015-12-24T16:51:14.000+01:00",
+    "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+    "message": "Test the CI integration.",
+    "short_id": "0ff3ae19",
+    "title": "Test the CI integration."
+  },
+  "coverage": null,
+  "created_at": "2015-12-24T15:51:21.880Z",
+  "artifacts_file": null,
+  "finished_at": "2015-12-24T17:54:31.198Z",
+  "id": 8,
+  "name": "rubocop",
+  "ref": "master",
+  "runner": null,
+  "stage": "test",
+  "started_at": "2015-12-24T17:54:30.733Z",
+  "status": "failed",
+  "tag": false,
+  "user": {
+    "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon",
+    "bio": null,
+    "created_at": "2015-12-21T13:14:24.077Z",
+    "id": 1,
+    "is_admin": true,
+    "linkedin": "",
+    "name": "Administrator",
+    "skype": "",
+    "state": "active",
+    "twitter": "",
+    "username": "root",
+    "web_url": "http://gitlab.dev/u/root",
+    "website_url": ""
+  }
 }
 ```
 
@@ -323,28 +323,28 @@ Example of response
 
 ```json
 {
-    "commit": {
-        "author_email": "admin@example.com",
-        "author_name": "Administrator",
-        "created_at": "2015-12-24T16:51:14.000+01:00",
-        "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
-        "message": "Test the CI integration.",
-        "short_id": "0ff3ae19",
-        "title": "Test the CI integration."
-    },
-    "coverage": null,
-    "created_at": "2016-01-11T10:13:33.506Z",
-    "artifacts_file": null,
-    "finished_at": "2016-01-11T10:14:09.526Z",
-    "id": 69,
-    "name": "rubocop",
-    "ref": "master",
-    "runner": null,
-    "stage": "test",
-    "started_at": null,
-    "status": "canceled",
-    "tag": false,
-    "user": null
+  "commit": {
+    "author_email": "admin@example.com",
+    "author_name": "Administrator",
+    "created_at": "2015-12-24T16:51:14.000+01:00",
+    "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+    "message": "Test the CI integration.",
+    "short_id": "0ff3ae19",
+    "title": "Test the CI integration."
+  },
+  "coverage": null,
+  "created_at": "2016-01-11T10:13:33.506Z",
+  "artifacts_file": null,
+  "finished_at": "2016-01-11T10:14:09.526Z",
+  "id": 69,
+  "name": "rubocop",
+  "ref": "master",
+  "runner": null,
+  "stage": "test",
+  "started_at": null,
+  "status": "canceled",
+  "tag": false,
+  "user": null
 }
 ```
 
@@ -369,28 +369,28 @@ Example of response
 
 ```json
 {
-    "commit": {
-        "author_email": "admin@example.com",
-        "author_name": "Administrator",
-        "created_at": "2015-12-24T16:51:14.000+01:00",
-        "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
-        "message": "Test the CI integration.",
-        "short_id": "0ff3ae19",
-        "title": "Test the CI integration."
-    },
-    "coverage": null,
-    "created_at": "2016-01-11T10:13:33.506Z",
-    "artifacts_file": null,
-    "finished_at": null,
-    "id": 69,
-    "name": "rubocop",
-    "ref": "master",
-    "runner": null,
-    "stage": "test",
-    "started_at": null,
-    "status": "pending",
-    "tag": false,
-    "user": null
+  "commit": {
+    "author_email": "admin@example.com",
+    "author_name": "Administrator",
+    "created_at": "2015-12-24T16:51:14.000+01:00",
+    "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+    "message": "Test the CI integration.",
+    "short_id": "0ff3ae19",
+    "title": "Test the CI integration."
+  },
+  "coverage": null,
+  "created_at": "2016-01-11T10:13:33.506Z",
+  "artifacts_file": null,
+  "finished_at": null,
+  "id": 69,
+  "name": "rubocop",
+  "ref": "master",
+  "runner": null,
+  "stage": "test",
+  "started_at": null,
+  "status": "pending",
+  "tag": false,
+  "user": null
 }
 ```
 
@@ -419,27 +419,77 @@ Example of response
 
 ```json
 {
-    "commit": {
-        "author_email": "admin@example.com",
-        "author_name": "Administrator",
-        "created_at": "2015-12-24T16:51:14.000+01:00",
-        "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
-        "message": "Test the CI integration.",
-        "short_id": "0ff3ae19",
-        "title": "Test the CI integration."
-    },
-    "coverage": null,
-    "download_url": null,
-    "id": 69,
-    "name": "rubocop",
-    "ref": "master",
-    "runner": null,
-    "stage": "test",
-    "created_at": "2016-01-11T10:13:33.506Z",
-    "started_at": "2016-01-11T10:13:33.506Z",
-    "finished_at": "2016-01-11T10:15:10.506Z",
-    "status": "failed",
-    "tag": false,
-    "user": null
+  "commit": {
+    "author_email": "admin@example.com",
+    "author_name": "Administrator",
+    "created_at": "2015-12-24T16:51:14.000+01:00",
+    "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+    "message": "Test the CI integration.",
+    "short_id": "0ff3ae19",
+    "title": "Test the CI integration."
+  },
+  "coverage": null,
+  "download_url": null,
+  "id": 69,
+  "name": "rubocop",
+  "ref": "master",
+  "runner": null,
+  "stage": "test",
+  "created_at": "2016-01-11T10:13:33.506Z",
+  "started_at": "2016-01-11T10:13:33.506Z",
+  "finished_at": "2016-01-11T10:15:10.506Z",
+  "status": "failed",
+  "tag": false,
+  "user": null
+}
+```
+
+## Keep artifacts
+
+Prevents artifacts from being deleted when expiration is set.
+
+```
+POST /projects/:id/builds/:build_id/artifacts/keep
+```
+
+Parameters
+
+| Attribute   | Type    | required | Description         |
+|-------------|---------|----------|---------------------|
+| `id`        | integer | yes      | The ID of a project |
+| `build_id`  | integer | yes      | The ID of a build   |
+
+Example request:
+
+```
+curl -X POST -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/projects/1/builds/1/artifacts/keep"
+```
+
+Example response:
+
+```json
+{
+  "commit": {
+    "author_email": "admin@example.com",
+    "author_name": "Administrator",
+    "created_at": "2015-12-24T16:51:14.000+01:00",
+    "id": "0ff3ae198f8601a285adcf5c0fff204ee6fba5fd",
+    "message": "Test the CI integration.",
+    "short_id": "0ff3ae19",
+    "title": "Test the CI integration."
+  },
+  "coverage": null,
+  "download_url": null,
+  "id": 69,
+  "name": "rubocop",
+  "ref": "master",
+  "runner": null,
+  "stage": "test",
+  "created_at": "2016-01-11T10:13:33.506Z",
+  "started_at": "2016-01-11T10:13:33.506Z",
+  "finished_at": "2016-01-11T10:15:10.506Z",
+  "status": "failed",
+  "tag": false,
+  "user": null
 }
 ```
diff --git a/doc/api/ci/README.md b/doc/api/ci/README.md
new file mode 100644
index 00000000000..96a281e27c8
--- /dev/null
+++ b/doc/api/ci/README.md
@@ -0,0 +1,24 @@
+# GitLab CI API
+
+## Purpose
+
+The main purpose of GitLab CI API is to provide the necessary data and context
+for GitLab CI Runners.
+
+All relevant information about the consumer API can be found in a
+[separate document](../../api/README.md).
+
+## API Prefix
+
+The current CI API prefix is `/ci/api/v1`.
+
+You need to prepend this prefix to all examples in this documentation, like:
+
+```bash
+GET /ci/api/v1/builds/:id/artifacts
+```
+
+## Resources
+
+- [Builds](builds.md)
+- [Runners](runners.md)
diff --git a/doc/api/ci/builds.md b/doc/api/ci/builds.md
new file mode 100644
index 00000000000..d779463fd8c
--- /dev/null
+++ b/doc/api/ci/builds.md
@@ -0,0 +1,138 @@
+# Builds API
+
+API used by runners to receive and update builds.
+
+>**Note:**
+This API is intended to be used only by Runners as their own
+communication channel. For the consumer API see the
+[Builds API](../builds.md).
+
+## Authentication
+
+This API uses two types of authentication:
+
+1. Unique Runner's token which is the token assigned to the Runner after it
+   has been registered.
+
+2. Using the build authorization token.
+   This is project's CI token that can be found under the **Builds** section of
+   a project's settings. The build authorization token can be passed as a
+   parameter or a value of `BUILD-TOKEN` header.
+
+These two methods of authentication are interchangeable.
+
+## Builds
+
+### Runs oldest pending build by runner
+
+```
+POST /ci/api/v1/builds/register
+```
+
+| Attribute | Type    | Required | Description         |
+|-----------|---------|----------|---------------------|
+| `token`   | string  | yes      | Unique runner token |
+
+
+```
+curl -X POST "https://gitlab.example.com/ci/api/v1/builds/register" -F "token=t0k3n"
+```
+
+### Update details of an existing build
+
+```
+PUT /ci/api/v1/builds/:id
+```
+
+| Attribute | Type    | Required | Description          |
+|-----------|---------|----------|----------------------|
+| `id`      | integer | yes      | The ID of a project  |
+| `token`   | string  | yes      | Unique runner token  |
+| `state`   | string  | no       | The state of a build |
+| `trace`   | string  | no       | The trace of a build |
+
+```
+curl -X PUT "https://gitlab.example.com/ci/api/v1/builds/1234" -F "token=t0k3n" -F "state=running" -F "trace=Running git clone...\n"
+```
+
+### Incremental build trace update
+
+Using this method you need to send trace content as a request body. You also need to provide the `Content-Range` header
+with a range of sent trace part. Note that you need to send parts in the proper order, so the begining of the part
+must start just after the end of the previous part. If you provide the wrong part, then GitLab CI API will return `416
+Range Not Satisfiable` response with a header `Range: 0-X`, where `X` is the current trace length.
+
+For example, if you receive `Range: 0-11` in the response, then your next part must contain a `Content-Range: 11-...`
+header and a trace part covered by this range.
+
+For a valid update API will return `202` response with:
+* `Build-Status: {status}` header containing current status of the build,
+* `Range: 0-{length}` header with the current trace length.
+
+```
+PATCH /ci/api/v1/builds/:id/trace.txt
+```
+
+Parameters:
+
+| Attribute | Type    | Required | Description          |
+|-----------|---------|----------|----------------------|
+| `id`      | integer | yes      | The ID of a build    |
+
+Headers:
+
+| Attribute       | Type    | Required | Description                       |
+|-----------------|---------|----------|-----------------------------------|
+| `BUILD-TOKEN`   | string  | yes      | The build authorization token     |
+| `Content-Range` | string  | yes      | Bytes range of trace that is sent |
+
+```
+curl -X PATCH "https://gitlab.example.com/ci/api/v1/builds/1234/trace.txt" -H "BUILD-TOKEN=build_t0k3n" -H "Content-Range=0-21" -d "Running git clone...\n"
+```
+
+
+### Upload artifacts to build
+
+```
+POST /ci/api/v1/builds/:id/artifacts
+```
+
+| Attribute | Type    | Required | Description                   |
+|-----------|---------|----------|-------------------------------|
+| `id`      | integer | yes      | The ID of a build             |
+| `token`   | string  | yes      | The build authorization token |
+| `file`    | mixed   | yes      | Artifacts file                |
+
+```
+curl -X POST "https://gitlab.example.com/ci/api/v1/builds/1234/artifacts" -F "token=build_t0k3n" -F "file=@/path/to/file"
+```
+
+### Download the artifacts file from build
+
+```
+GET /ci/api/v1/builds/:id/artifacts
+```
+
+| Attribute | Type    | Required | Description                   |
+|-----------|---------|----------|-------------------------------|
+| `id`      | integer | yes      | The ID of a build             |
+| `token`   | string  | yes      | The build authorization token |
+
+```
+curl "https://gitlab.example.com/ci/api/v1/builds/1234/artifacts" -F "token=build_t0k3n"
+```
+
+### Remove the artifacts file from build
+
+```
+DELETE /ci/api/v1/builds/:id/artifacts
+```
+
+| Attribute | Type    | Required | Description                   |
+|-----------|---------|----------|-------------------------------|
+| ` id`     | integer | yes      | The ID of a build             |
+| `token`   | string  | yes      | The build authorization token |
+
+```
+curl -X DELETE "https://gitlab.example.com/ci/api/v1/builds/1234/artifacts" -F "token=build_t0k3n"
+```
diff --git a/doc/api/ci/runners.md b/doc/api/ci/runners.md
new file mode 100644
index 00000000000..96b3c42f773
--- /dev/null
+++ b/doc/api/ci/runners.md
@@ -0,0 +1,57 @@
+# Runners API
+
+API used by Runners to register and delete themselves.
+
+>**Note:**
+This API is intended to be used only by Runners as their own
+communication channel. For the consumer API see the
+[new Runners API](../runners.md).
+
+## Authentication
+
+This API uses two types of authentication:
+
+1. Unique Runner's token, which is the token assigned to the Runner after it
+   has been registered.
+
+2. Using Runners' registration token.
+   This is a token that can be found in project's settings.
+   It can also be found in the **Admin > Runners** settings area.
+   There are two types of tokens you can pass: shared Runner registration
+   token or project specific registration token.
+
+## Register a new runner
+
+Used to make GitLab CI aware of available runners.
+
+```sh
+POST /ci/api/v1/runners/register
+```
+
+| Attribute | Type    | Required  | Description |
+| --------- | ------- | --------- | ----------- |
+| `token`   | string  | yes       | Runner's registration token |
+
+Example request:
+
+```sh
+curl -X POST "https://gitlab.example.com/ci/api/v1/runners/register" -F "token=t0k3n"
+```
+
+## Delete a Runner
+
+Used to remove a Runner.
+
+```sh
+DELETE /ci/api/v1/runners/delete
+```
+
+| Attribute | Type    | Required  | Description |
+| --------- | ------- | --------- | ----------- |
+| `token`   | string  | yes       | Runner's registration token |
+
+Example request:
+
+```sh
+curl -X DELETE "https://gitlab.example.com/ci/api/v1/runners/delete" -F "token=t0k3n"
+```
diff --git a/doc/ci/README.md b/doc/ci/README.md
index 4abc45bf9bb..ef72df97ce6 100644
--- a/doc/ci/README.md
+++ b/doc/ci/README.md
@@ -14,5 +14,5 @@
 - [Trigger builds through the API](triggers/README.md)
 - [Build artifacts](build_artifacts/README.md)
 - [User permissions](permissions/README.md)
-- [API](api/README.md)
+- [API](../../api/ci/README.md)
 - [CI services (linked docker containers)](services/README.md)
diff --git a/doc/ci/api/README.md b/doc/ci/api/README.md
index aea808007fc..4ca8d92d7cc 100644
--- a/doc/ci/api/README.md
+++ b/doc/ci/api/README.md
@@ -1,22 +1,3 @@
 # GitLab CI API
 
-## Purpose
-
-Main purpose of GitLab CI API is to provide necessary data and context for
-GitLab CI Runners.
-
-For consumer API take a look at this [documentation](../../api/README.md) where
-you will find all relevant information.
-
-## API Prefix
-
-Current CI API prefix is `/ci/api/v1`.
-
-You need to prepend this prefix to all examples in this documentation, like:
-
-    GET /ci/api/v1/builds/:id/artifacts
-
-## Resources
-
-- [Builds](builds.md)
-- [Runners](runners.md)
+This document was moved to a [new location](../../api/ci/README.md).
diff --git a/doc/ci/api/builds.md b/doc/ci/api/builds.md
index 79761a893da..f5bd3181c02 100644
--- a/doc/ci/api/builds.md
+++ b/doc/ci/api/builds.md
@@ -1,139 +1,3 @@
 # Builds API
 
-API used by runners to receive and update builds.
-
-_**Note:** This API is intended to be used only by Runners as their own
-communication channel. For the consumer API see the
-[Builds API](../../api/builds.md)._
-
-## Authentication
-
-This API uses two types of authentication:
-
-1.   Unique runner's token
-
-     Token assigned to runner after it has been registered.
-
-2.   Using build authorization token
-
-     This is project's CI token that can be found in Continuous Integration
-     project settings.
-
-     Build authorization token can be passed as a parameter or a value of
-     `BUILD-TOKEN` header. This method are interchangeable.
-
-## Builds
-
-### Runs oldest pending build by runner
-
-```
-POST /ci/api/v1/builds/register
-```
-
-| Attribute | Type    | Required | Description         |
-|-----------|---------|----------|---------------------|
-| `token`   | string  | yes      | Unique runner token |
-
-
-```
-curl -X POST "https://gitlab.example.com/ci/api/v1/builds/register" -F "token=t0k3n"
-```
-
-### Update details of an existing build
-
-```
-PUT /ci/api/v1/builds/:id
-```
-
-| Attribute | Type    | Required | Description          |
-|-----------|---------|----------|----------------------|
-| `id`      | integer | yes      | The ID of a project  |
-| `token`   | string  | yes      | Unique runner token  |
-| `state`   | string  | no       | The state of a build |
-| `trace`   | string  | no       | The trace of a build |
-
-```
-curl -X PUT "https://gitlab.example.com/ci/api/v1/builds/1234" -F "token=t0k3n" -F "state=running" -F "trace=Running git clone...\n"
-```
-
-### Incremental build trace update
-
-Using this method you need to send trace content as a request body. You also need to provide the `Content-Range` header
-with a range of sent trace part. Note that you need to send parts in the proper order, so the begining of the part
-must start just after the end of the previous part. If you provide the wrong part, then GitLab CI API will return `416
-Range Not Satisfiable` response with a header `Range: 0-X`, where `X` is the current trace length.
-
-For example, if you receive `Range: 0-11` in the response, then your next part must contain a `Content-Range: 11-...`
-header and a trace part covered by this range.
-
-For a valid update API will return `202` response with:
-* `Build-Status: {status}` header containing current status of the build,
-* `Range: 0-{length}` header with the current trace length.
-
-```
-PATCH /ci/api/v1/builds/:id/trace.txt
-```
-
-Parameters:
-
-| Attribute | Type    | Required | Description          |
-|-----------|---------|----------|----------------------|
-| `id`      | integer | yes      | The ID of a build    |
-
-Headers:
-
-| Attribute       | Type    | Required | Description                       |
-|-----------------|---------|----------|-----------------------------------|
-| `BUILD-TOKEN`   | string  | yes      | The build authorization token     |
-| `Content-Range` | string  | yes      | Bytes range of trace that is sent |
-
-```
-curl -X PATCH "https://gitlab.example.com/ci/api/v1/builds/1234/trace.txt" -H "BUILD-TOKEN=build_t0k3n" -H "Content-Range=0-21" -d "Running git clone...\n"
-```
-
-
-### Upload artifacts to build
-
-```
-POST /ci/api/v1/builds/:id/artifacts
-```
-
-| Attribute | Type    | Required | Description                   |
-|-----------|---------|----------|-------------------------------|
-| `id`      | integer | yes      | The ID of a build             |
-| `token`   | string  | yes      | The build authorization token |
-| `file`    | mixed   | yes      | Artifacts file                |
-
-```
-curl -X POST "https://gitlab.example.com/ci/api/v1/builds/1234/artifacts" -F "token=build_t0k3n" -F "file=@/path/to/file"
-```
-
-### Download the artifacts file from build
-
-```
-GET /ci/api/v1/builds/:id/artifacts
-```
-
-| Attribute | Type    | Required | Description                   |
-|-----------|---------|----------|-------------------------------|
-| `id`      | integer | yes      | The ID of a build             |
-| `token`   | string  | yes      | The build authorization token |
-
-```
-curl "https://gitlab.example.com/ci/api/v1/builds/1234/artifacts" -F "token=build_t0k3n"
-```
-
-### Remove the artifacts file from build
-
-```
-DELETE /ci/api/v1/builds/:id/artifacts
-```
-
-| Attribute | Type    | Required | Description                   |
-|-----------|---------|----------|-------------------------------|
-| ` id`     | integer | yes      | The ID of a build             |
-| `token`   | string  | yes      | The build authorization token |
-
-```
-curl -X DELETE "https://gitlab.example.com/ci/api/v1/builds/1234/artifacts" -F "token=build_t0k3n"
-```
+This document was moved to a [new location](../../api/ci/builds.md).
diff --git a/doc/ci/api/runners.md b/doc/ci/api/runners.md
index 2f01da4bd76..b14ea99db76 100644
--- a/doc/ci/api/runners.md
+++ b/doc/ci/api/runners.md
@@ -1,46 +1,3 @@
 # Runners API
 
-API used by runners to register and delete themselves.
-
-_**Note:** This API is intended to be used only by Runners as their own
-communication channel. For the consumer API see the
-[new Runners API](../../api/runners.md)._
-
-## Authentication
-
-This API uses two types of authentication:
-
-1.   Unique runner's token
-
-     Token assigned to runner after it has been registered.
-
-2.   Using runners' registration token
-
-     This is a token that can be found in project's settings.
-     It can be also found in Admin area » Runners settings.
-
-     There are two types of tokens you can pass - shared runner registration
-     token or project specific registration token.
-
-## Runners
-
-### Register a new runner
-
-Used to make GitLab CI aware of available runners.
-
-    POST /ci/api/v1/runners/register
-
-Parameters:
-
-  * `token` (required) - Registration token
-
-
-### Delete a runner
-
-Used to remove runner.
-
-    DELETE /ci/api/v1/runners/delete
-
-Parameters:
-
-  * `token` (required) - Unique runner token
+This document was moved to a [new location](../../api/ci/runners.md).
diff --git a/doc/ci/yaml/README.md b/doc/ci/yaml/README.md
index 0546fa50f1c..9c98f9c98c6 100644
--- a/doc/ci/yaml/README.md
+++ b/doc/ci/yaml/README.md
@@ -32,6 +32,7 @@ If you want a quick introduction to GitLab CI, follow our
     - [artifacts](#artifacts)
         - [artifacts:name](#artifacts-name)
         - [artifacts:when](#artifacts-when)
+        - [artifacts:expire_in](#artifacts-expire_in)
     - [dependencies](#dependencies)
     - [before_script and after_script](#before_script-and-after_script)
 - [Hidden jobs](#hidden-jobs)
@@ -705,6 +706,40 @@ job:
     when: on_failure
 ```
 
+#### artifacts:expire_in
+
+>**Note:**
+Introduced in GitLab 8.9 and GitLab Runner v1.3.0.
+
+`artifacts:expire_in` is used to remove uploaded artifacts after specified time.
+By default artifacts are stored on GitLab forver.
+`expire_in` allows to specify after what time the artifacts should be removed.
+The artifacts will expire counting from the moment when they are uploaded and stored on GitLab.
+
+After artifacts uploading you can use the **Keep** button on build page to keep the artifacts forever.
+
+Artifacts are removed every hour, but they are not accessible after expire date.
+
+The value of `expire_in` is a elapsed time. The example of parsable values:
+- '3 mins 4 sec'
+- '2 hrs 20 min'
+- '2h20min'
+- '6 mos 1 day'
+- '47 yrs 6 mos and 4d'
+- '3 weeks and 2 days'
+
+---
+
+**Example configurations**
+
+To expire artifacts after 1 week from the moment that they are uploaded:
+
+```yaml
+job:
+  artifacts:
+    expire_in: 1 week
+```
+
 ### dependencies
 
 >**Note:**