add license (#903)

* add license

* Update source_install-nebula-graph-by-rpm-or-deb.md

Co-authored-by: cooper-lzy <[email protected]>

docs-2.0/4.deployment-and-installation/2.compile-and-install-nebula-graph/1.install-nebula-graph-by-compiling-the-source-code.md

@@ -80,13 +80,11 @@ The source code of the master branch changes frequently. If the corresponding Ne
 
 2. In the `nebula/build` directory, run `make -j{N}` and `make install` again.
 
-## Next
+## Next to do
 
-- [Manage Nebula Graph services](../../2.quick-start/5.start-stop-service.md)
-
-- [Connect to Nebula Graph](../../2.quick-start/3.connect-to-nebula-graph.md)
+- (Enterprise Edition)[Deploy license](../deploy-license.md)
 
-- [Nebula Graph CRUD](../../2.quick-start/4.nebula-graph-crud.md)
+- [Manage Nebula Graph services](../../2.quick-start/5.start-stop-service.md)
 
 ## CMake variables
 

docs-2.0/4.deployment-and-installation/2.compile-and-install-nebula-graph/4.install-nebula-graph-from-tar.md

@@ -68,4 +68,6 @@ So far, you have installed Nebula Graph successfully.
 
 ## Next to do
 
-Use the `nebula.service` file in the `scripts` directory to start Nebula Graph. For details, see [Manage Nebula Graph Service](../manage-service.md).
+- (Enterprise Edition)[Deploy license](../deploy-license.md)
+
+- [Manage Nebula Graph services](../manage-service.md)

docs-2.0/4.deployment-and-installation/deploy-license.md

@@ -0,0 +1,71 @@
+# Deploy license
+
+Nebula Graph Enterprise Edition requires the user to deploy a license file before starting the Enterprise Edition. This topic describes how to deploy a license file for the Enterprise Edition.
+
+!!! enterpriseonly
+
+    License is a software authorization certificate provided for users of the Enterprise Edition. Users of the Enterprise Edition can send email to `[email protected]` to apply for a license file.
+
+## Precautions
+
+- If the license file is not deployed, Nebula Graph Enterprise Edition cannot be started.
+
+- Do not modify the license file, otherwise the license will become invalid.
+
+- If the license is about to expire, send email to `[email protected]` to apply for renewal.
+
+- The transition period after the license expires is 3 days:
+
+  - If you start the Enterprise Edition within 7 days before the license expires or on the day the license expires, a log will be printed as a reminder.
+
+  - The license can still be used for 3 days after it expires.
+
+  - If the license has expired for 3 days, you will not be able to start the Enterprise Edition, and a log will be printed as a reminder.
+
+## License description
+
+You can use `cat` to view the content of the license file (`nebula.license`). The example is as follows:
+
+```bash
+----------License Content Start----------
+{
+  "vendor": "Vesoft_Inc",
+  "organization": "doc",
+  "issuedDate": "2021-11-07T16:00:00.000Z",
+  "expirationDate": "2021-11-30T15:59:59.000Z",
+  "product": "nebula_graph",
+  "version": ">2.6.1",
+  "licenseType": "enterprise"
+}
+----------License Content End----------
+
+----------License Key Start----------
+cofFcOxxxxxxxxxxxxxhnZgaxrQ==
+----------License Key End----------
+```
+
+The license file contains information such as `issuedDate` and `expirationDate`. The description is as follows.
+
+|Parameter|Description|
+|:---|:---|
+|`vendor`|The supplier.|
+|`organization`|The username.|
+|`issuedDate`|The date that the license is issued. |
+|`expirationDate`|The date that the license expires.|
+|`product`|The product type. The product type of Nebula Graph is `nebula_graph`.|
+|`version`|The version information.|
+|`licenseType`|The license type, including `enterprise`, `samll_bussiness`, `pro`, and `individual`. |
+
+## Steps
+
+1. Send email to `[email protected]` to apply for the Nebula Graph Enterprise Edition package.
+
+2. Install Nebula Graph Enterprise Edition. The installation method is the same as the Community Edition. See [Install Nebula Graph with RPM or DEB package](2.compile-and-install-nebula-graph/2.install-nebula-graph-by-rpm-or-deb.md).
+
+3. Send email to `[email protected]` to apply for the license file `nebula.license`.
+
+4. Upload the license file to all hosts that contain Meta services. The path is in the `share/resources/` of each Meta service installation directory.
+
+  !!! note
+
+        For the upload address of the license file for ecosystem tools, refer to the document of [Ecosystem tools overview](../20.appendix/6.eco-tool-version.md).

docs-2.0/reuse/source_install-nebula-graph-by-rpm-or-deb.md

@@ -149,5 +149,6 @@ Prepare the right [resources](https://docs.nebula-graph.io/{{nebula.release}}/4.
 
 ## What's next
 
+- (Enterprise Edition)[Deploy license](https://docs.nebula-graph.com.cn/{{nebula.release}}/4.deployment-and-installation/deploy-license)
 - [start Nebula Graph](https://docs.nebula-graph.io/{{nebula.release}}/2.quick-start/5.start-stop-service/)  <!--这里用外链。-->
 - [connect to Nebula Graph](https://docs.nebula-graph.io/{{nebula.release}}/2.quick-start/3.connect-to-nebula-graph/)<!--这里用外链。-->

mkdocs.yml

@@ -298,6 +298,7 @@ nav:
           - Install Nebula Graph with the tar.gz file: 4.deployment-and-installation/2.compile-and-install-nebula-graph/4.install-nebula-graph-from-tar.md
           - Deploy Nebula Graph with Docker Compose: 4.deployment-and-installation/2.compile-and-install-nebula-graph/3.deploy-nebula-graph-with-docker-compose.md
           - Deploy a Nebula Graph cluster on multiple servers: 4.deployment-and-installation/2.compile-and-install-nebula-graph/deploy-nebula-graph-cluster.md
+      - Deploy license: 4.deployment-and-installation/deploy-license.md
       - Manage Service: 4.deployment-and-installation/manage-service.md
       - Connect to Service: 4.deployment-and-installation/connect-to-nebula-graph.md
       - Upgrade: