[GitHub] [apisix] tzssangglass commented on a diff in pull request #6751: feat(zookeeper): support zookeeper service discovery

[GitBox <gi...@apache.org>]

tzssangglass commented on code in PR #6751:
URL: https://github.com/apache/apisix/pull/6751#discussion_r844017888


##########
docs/en/latest/discovery/zookeeper.md:
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@@ -0,0 +1,144 @@
+---
+title: zookeeper
+---
+
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+
+## Service Discovery Via Zookeeper
+
+`Zookeeper` service discovery needs to rely on the [apisix-seed](https://github.com/api7/apisix-seed) project.
+
+### How `apisix-seed` Works
+
+![APISIX-SEED](../../../assets/images/apisix-seed.svg)
+
+`apisix-seed` completes data exchange by watching the changes of `etcd` and `zookeeper` at the same time.
+
+The process is as follows:
+
+1. `APISIX` registers an upstream and specifies the service discovery type as `zookeeper` to `etcd`.
+2. `apisix-seed` watches the resource changes of `APISIX` in `etcd` and filters the discovery type and obtains the service name.
+3. `apisix-seed` binds the service to the `etcd` resource and starts watching the service in zookeeper.
+4. The client registers the service with `zookeeper`.
+5. `apisix-seed` gets the service changes in `zookeeper`.
+6. `apisix-seed` queries the bound `etcd` resource information through the service name, and writes the updated service node to `etcd`.
+7. The `APISIX` worker watches `etcd` changes and refreshes the service node information to the memory.
+
+### Setting `apisix-seed` and Zookeeper
+
+The configuration steps are as follows:
+
+1. Start the Zookeeper service
+
+```bash
+docker run -itd --rm --name=dev-zookeeper -p 2181:2181 zookeeper:3.7.0
+```
+
+2. Download and compile the `apisix-seed` project.
+
+```bash
+git clone https://github.com/api7/apisix-seed.git
+cd apisix-seed
+go build
+```
+
+3. Modify the `apisix-seed` configuration file, config path `conf/conf.yaml`.

Review Comment:
   Modify the `apisix` configuration file?



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