<p>The root cause is BasePlugin is deprecated and removed from kong 3.x,see it <a href="https://docs.konghq.com/gateway/latest/plugin-development/custom-logic/#migrating-from-baseplugin-module" rel="nofollow noreferrer">here</a>.The jwt-keycloak plugin imported BasePlugin in handler.lua, so you have to do the migration by yourself,it's easy,just fork its repo,change code,install it from source in Dockerfile。</p>

CC BY-SA 4.0
2023-01-05T09:16:17.467Z
Please share with me the details about: "change code" of your answer.
helle
CC BY-SA 4.0
2023-01-16T07:54:16.933Z
https://github.com/zjjfly/kong-plugin-jwt-keycloak, this is my repo forked from gbbirkisson's repo，you can find my changes in commit history
资俊杰
CC BY-SA 4.0
2023-01-05T04:35:48.743Z
2023-01-05T04:35:48.743Z
资俊杰
<p>I found a <a href="https://dev.to/robincher/securing-your-site-via-oidc-powered-by-kong-and-keycloak-2ccc" rel="nofollow noreferrer">tutorial</a> how to setup kong with two open source plugins to get keycloak working with kong, but unfortunately it is 2 years old and I ran in troubles.</p>
<p>Most of the steps still worked and I was able to install the plugin versions in the tutorial via <code>luarocks</code>. unfortunately, the kong did not restart after configuring it to work with the plugins:</p>
<p><code>plungins = bundeld,oidc,jwt-keycloak</code></p>
<p>running in the error, that the <code>kong.plugins.base_plugin</code> cannot be found:</p>
<pre><code>Error: /usr/local/share/lua/5.1/kong/tools/utils.lua:708: error loading module 'kong.plugins.oidc.handler':
/usr/local/share/lua/5.1/kong/plugins/oidc/handler.lua:1: module 'kong.plugins.base_plugin' not found:No LuaRocks module found for kong.plugins.base_plugin
    no field package.preload['kong.plugins.base_plugin']
</code></pre>
<p><strong>What I tried</strong></p>
<ul>
<li>I tried to install a <code>base_plugin</code> but lua does not find any.</li>
<li>I was googling a lot, but did't quite found the same issue.</li>
</ul>
<p>Well, I am quite stuck and was wondering if there is an other way (maybe directly with the oAuth plugin?), or how I can fix this issue. Also I don't really know how debug that issue and am happy for ideas!</p>

<api-gateway><keycloak>
Setting up Keycloak with Kong v5.1
helle
# Setting up Keycloak with Kong v5.1

(Asked by: username_0 on 2022-11-18)

I found a tutorial how to setup kong with two open source plugins to get keycloak working with kong, but unfortunately it is 2 years old and I ran in troubles.
Most of the steps still worked and I was able to install the plugin versions in the tutorial via luarocks. unfortunately, the kong did not restart after configuring it to work with the plugins:
plungins = bundeld,oidc,jwt-keycloak
running in the error, that the kong.plugins.base_plugin cannot be found:
Error: /usr/local/share/lua/5.1/kong/tools/utils.lua:708: error loading module 'kong.plugins.oidc.handler':
/usr/local/share/lua/5.1/kong/plugins/oidc/handler.lua:1: module 'kong.plugins.base_plugin' not found:No LuaRocks module found for kong.plugins.base_plugin
    no field package.preload['kong.plugins.base_plugin']

What I tried

I tried to install a base_plugin but lua does not find any.
I was googling a lot, but did't quite found the same issue.

Well, I am quite stuck and was wondering if there is an other way (maybe directly with the oAuth plugin?), or how I can fix this issue. Also I don't really know how debug that issue and am happy for ideas!

**Tags:** api-gateway, keycloak


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## 1 answers

### Answer by username_1 on 2023-01-05. Score: 1

The root cause is BasePlugin is deprecated and removed from kong 3.x,see it [here](https://docs.konghq.com/gateway/latest/plugin-development/custom-logic/#migrating-from-baseplugin-module).The jwt-keycloak plugin imported BasePlugin in handler.lua, so you have to do the migration by yourself,it's easy,just fork its repo,change code,install it from source in Dockerfile。

> **Comments:**
> **username_0**: Please share with me the details about: "change code" of your answer.  
> **username_1**: https://github.com/zjjfly/kong-plugin-jwt-keycloak, this is my repo forked from gbbirkisson's repo，you can find my changes in commit history  

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