Install OpenResty on CentOS 8 via dnf
This tutorial will demonstrate how to install OpenResty on CentOS 8 via dnf.
We’ll use this fresh install of CentOS 8 in this tutorial.
We can always goto the openresty.org web site to find the instructions.
Then click on the Installation link on the left side bar.
And click on the link “official pre-built packages” under the “Binary Packages” section.
As we can see here, we do support a lot of different Linux distributions.
Scroll down to the CentOS section.
We can find all the commands for enabling the yum repository and installing the OpenResty rpm packages.
Back to our CentOS 8 system, first install the standard wget package if you don’t have it already.
1 | sudo dnf -y install wget |
Use wget to download the openresty.repo file from our site.
1 | wget 'https://openresty.org/package/centos/openresty.repo' |
We move this file into the yum repositories’ configuration directory.
1 | sudo mv openresty.repo /etc/yum.repos.d/ |
Note that we need sudo here.
We update the yum index database.
1 | sudo dnf check-update |
Now it’s time to install our main RPM package, openresty.
1 | sudo dnf -y install openresty |
Check if the openresty executable is available.
1 | which openresty |
This openresty executable is just a symbolic link.
1 | file `which openresty` |
And check its version.
1 | openresty -V |
We can start the default openresty server like this.
1 | sudo systemctl start openresty |
Check if the nginx processes are up and running.
1 | ps aux|grep nginx |
Perfect.
Test the default home page with the curl command.
1 | curl 127.0.0.1/ |
Yay, it’s working.
Note, however, that the resty command-line utility is not installed yet.
1 | which resty |
If you want it, then you can install the openresty-resty RPM package from the same repository.
1 | sudo dnf -y install openresty-resty |
Now it should be ready.
1 | which resty |
Similarly, if you want to use the restydoc command-line utility, you should install the openresty-doc package.
1 | sudo dnf -y install openresty-doc |
Now it’s available too. Try it out!
1 | restydoc -s content_by_lua_file |
We can also install OPM for installing more Lua modules contributed by the OpenResty community.
1 | sudo dnf -y install openresty-opm |
We can try installing the lua-resty-http library authored by James Hurst.
1 | sudo opm get pintsized/lua-resty-http |
Try loading it with the resty utility.
1 | resty -e 'require "resty.http"' |
Success!
There is also a debug build of OpenResty which includes debugging logs and all the internal assertions enabled.
1 | sudo dnf -y install openresty-debug |
We can invoke this debug version of openresty like this.
1 | which openresty-debug |
This openresty-debug executable is also a symbolic link.
1 | file `which openresty-debug` |
We should never use it in production since it is much slower than the release build.
Furthermore, there are also special builds for checking memory issues via Valgrind and Address Sanitizer.
1 | sudo dnf list openresty-valgrind openresty-asan |
Try these when you have memory issues to debug. We may cover these in future tutorials.
To upgrade OpenResty packages to their latest versions, just run these commands.
1 | sudo dnf check-update |
To check all the available packages in our openresty repository.
1 | dnf --disablerepo='*' --enablerepo="openresty" list available |
We’ve got a lot of packages here.
We can find detailed documentation for all these RPM packages on the web page openresty.org/en/rpm-packages.html.
We have indeed got a lot of packages for the user to choose from.
That’s all I’d like to cover today. Have fun!
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About This Article and Associated Video
This article and its associated video are both generated automatically from a simple screenplay file.
About The Author
Yichun Zhang is the creator of the OpenResty® open source project. He is also the founder and CEO of the OpenResty Inc. company. He contributed a dozen open source Nginx 3rd-party modules, quite some Nginx and LuaJIT core patches, and designed the OpenResty XRay platform.
Translations
We provide the Chinese translation for this article on blog.openresty.com.cn. We also welcome interested readers to contribute translations in other natural languages as long as the full article is translated without any omissions. We thank them in advance.
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visualizers for real world applications built atop the open source software. If you are
interested, please send your resume to talents@openresty.com . Thank you!
