[FLINK-34732][cdc][ci] Add document dead link check for Flink CDC Documentation

.dlc.json

@@ -0,0 +1,35 @@
+{
+  "ignorePatterns": [
+    {
+      "pattern": "^http://localhost"
+    },
+    {
+      "pattern": "^#"
+    },
+    {
+      "pattern": "^{"
+    },
+    {
+      "pattern": "^https://repo1.maven.org/maven2/org/apache/flink.*SNAPSHOT.*"
+    },
+    {
+      "pattern": "^https://mvnrepository.com"
+    },
+    {
+      "pattern": "^https://img.shields.io"
+    },
+    {
+      "pattern": "^https://twitter.com*"
+    }
+  ],
+  "timeout": "30s",
+  "retryOn429": true,
+  "retryCount": 10,
+  "fallbackRetryDelay": "1000s",
+  "aliveStatusCodes": [
+    0,
+    200,
+    401,
+    403
+  ]
+}

.github/workflows/build_docs.yml

@@ -16,6 +16,12 @@
 name: "Build documentation"
 
 on:
+  pull_request:
+    branches:
+      - master
+      - release-*
+    paths:
+      - 'docs/**'
   push:
     paths:
       - 'docs/**'
@@ -30,9 +36,19 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build-documentation:
+
+  markdown-link-check:
     if: github.repository == 'apache/flink-cdc'
     runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - uses: gaurav-nelson/github-action-markdown-link-check@1.0.15
+        with:
+          config-file: '.dlc.json'
+
+  build-documentation:
+    if: github.event_name != 'pull_request' && github.repository == 'apache/flink-cdc'
+    runs-on: ubuntu-latest
     strategy:
       max-parallel: 1
       matrix:

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-  <a href="[https://github.com/apache/flink-cdc](https://nightlies.apache.org/flink/flink-cdc-docs-stable/)"><img src="docs/static/fig/flinkcdc-logo.png" alt="Flink CDC" style="width: 375px;"></a>
+  <a href="https://nightlies.apache.org/flink/flink-cdc-docs-stable/"><img src="docs/static/fig/flinkcdc-logo.png" alt="Flink CDC" style="width: 375px;"></a>
 </p>
 <p align="center">
 <a href="https://github.com/apache/flink-cdc/" target="_blank">

docs/content.zh/_index.md

@@ -165,7 +165,7 @@ under the License.
           <p style="text-align: left; color: #BF74F1; font-size: x-large; padding: 0">Try Flink CDC</p>
           <p style="text-align: left;">
         Flink CDC provides a series of quick start demos without any dependencies or java code. A Linux or MacOS computer with Docker installed is enough. 
-        Please check out our <a href="docs/get-started/introduction">Quick Start</a> for more information.
+        Please check out our <a href="{{< ref "docs/get-started/introduction" >}}">Quick Start</a> for more information.
          </p>
     </div>
     <div style="flex: 1;"></div>

docs/content.zh/docs/connectors/legacy-flink-cdc-sources/db2-cdc.md

@@ -32,9 +32,9 @@ describes how to setup the db2 CDC connector to run SQL queries against Db2 data
 
 ## Supported Databases
 
-| Connector             | Database                                           | Driver               |
-|-----------------------|----------------------------------------------------|----------------------|
-| [Db2-cdc](../db2-cdc) | <li> [Db2](https://www.ibm.com/products/db2): 11.5 | Db2 Driver: 11.5.0.0 |
+| Connector | Database                                           | Driver               |
+|-----------|----------------------------------------------------|----------------------|
+| Db2-cdc   | <li> [Db2](https://www.ibm.com/products/db2): 11.5 | Db2 Driver: 11.5.0.0 |
 
 Dependencies
 ------------

docs/content.zh/docs/connectors/legacy-flink-cdc-sources/mysql-cdc.md

@@ -30,9 +30,9 @@ MySQL CDC 连接器允许从 MySQL 数据库读取快照数据和增量数据。
 
 ## 支持的数据库
 
-| Connector                                               | Database                                                                                                                                                                                                                                                                                                                                                                                               | Driver                  |
-|----------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|
-| mysql-cdc       | <li> [MySQL](https://dev.mysql.com/doc): 5.6, 5.7, 8.0.x <li> [RDS MySQL](https://www.aliyun.com/product/rds/mysql): 5.6, 5.7, 8.0.x <li> [PolarDB MySQL](https://www.aliyun.com/product/polardb): 5.6, 5.7, 8.0.x <li> [Aurora MySQL](https://aws.amazon.com/cn/rds/aurora): 5.6, 5.7, 8.0.x <li> [MariaDB](https://mariadb.org): 10.x <li> [PolarDB X](https://github.com/ApsaraDB/galaxysql): 2.0.1 | JDBC Driver: 8.0.27     |
+| Connector | Database                                                                                                                                                                                                                                                                                                                                                                                               | Driver              |
+|-----------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------|
+| mysql-cdc | <li> [MySQL](https://dev.mysql.com/doc): 5.6, 5.7, 8.0.x <li> [RDS MySQL](https://www.aliyun.com/product/rds/mysql): 5.6, 5.7, 8.0.x <li> [PolarDB MySQL](https://www.aliyun.com/product/polardb): 5.6, 5.7, 8.0.x <li> [Aurora MySQL](https://aws.amazon.com/cn/rds/aurora): 5.6, 5.7, 8.0.x <li> [MariaDB](https://mariadb.org): 10.x <li> [PolarDB X](https://github.com/ApsaraDB/galaxysql): 2.0.1 | JDBC Driver: 8.0.27 |
 
 依赖
 ------------
@@ -740,7 +740,7 @@ $ ./bin/flink run \
 <table class="colwidths-auto docutils">
     <thead>
       <tr>
-        <th class="text-left" style="width:30%;">MySQL type<a href="https://dev.mysql.com/doc/man/8.0/en/data-types.html"></a></th>
+        <th class="text-left" style="width:30%;">MySQL type<a href="https://dev.mysql.com/doc/refman/8.0/en/data-types.html"></a></th>
         <th class="text-left" style="width:10%;">Flink SQL type<a href="{% link dev/table/types.md %}"></a></th>
         <th class="text-left" style="width:60%;">NOTE</th>
       </tr>