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litespeed_wiki:cloudlinux:lsphp_criu_enable [2018/08/20 19:30] Jackson Zhang [1. Verify CRIU is enabled on your system] |
litespeed_wiki:cloudlinux:lsphp_criu_enable [2019/10/15 18:40] Lisa Clarke [How to Enable CRIU on CloudLinux + cPanel EA4 + LSWS] |
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| - | ====== How to Enable LSPHP CRIU on CloudLinux and cPanel EA4 ====== | + | ====== Enabling CRIU on CloudLinux + cPanel EA4 + LSWS ====== |
| - | Checkpoint/Restore In Userspace, or CRIU, is an open source project which dumps all of the information of a running process to disk and restores it at the point of the dump. The LiteSpeed Enterprise Edition Web Server now supports CRIU for the CloudLinux implementation of the PHP processor. This will improve the performance of LiteSpeed for transactions which are commonly used, and reduce the memory overhead on the server. | + | **IMPORTANT!! CRIU may cause stability issues! Enable CRIU AT YOUR OWN RISK!** |
| + | |||
| + | Checkpoint/Restore In Userspace, or CRIU, is an open source project which dumps all of the information of a running process to disk and restores it at the point of the dump. The LiteSpeed Enterprise Edition Web Server now supports CRIU for the CloudLinux implementation of the PHP processor. | ||
| + | |||
| + | However, generally, we don't recommend you enable CRIU unless you have a special requirement for it. CRIU uses significant server resources and may generate unusual errors while providing no performance benefits. | ||
| + | |||
| + | **We have received quite a few reports that potential bugs on the CRIU module may cause web server stability issues. Please permanently disable CRIU, or enable CRIU AT YOUR OWN RISK**. | ||
| ===== Requirements ===== | ===== Requirements ===== | ||
| Line 12: | Line 18: | ||
| ===== Installation ===== | ===== Installation ===== | ||
| - | ==== 1. Verify CRIU is enabled on your system ==== | + | ==== Verify CRIU is enabled on your system ==== |
| - | Criu is installed with dependency to ea-apache24-mod_lsapi for cpanel EA4( or mod_lsapi for cpanel EA3) 1.1 and above package. If you have not installed it, you should: | + | Criu is installed with dependency to ea-apache24-mod_lsapi for cpanel EA4( or mod_lsapi for cpanel EA3) 1.1 and above package. |
| + | |||
| + | If you have not installed it, you should: | ||
| <code>yum install liblsapi liblsapi-devel</code> | <code>yum install liblsapi liblsapi-devel</code> | ||
| + | |||
| + | <code> | ||
| + | ============================================================================================================================================================================= | ||
| + | Package Arch Version Repository Size | ||
| + | ============================================================================================================================================================================= | ||
| + | Installing: | ||
| + | liblsapi x86_64 1.1-28.el7.cloudlinux cloudlinux-x86_64-server-7 180 k | ||
| + | liblsapi-devel x86_64 1.1-28.el7.cloudlinux cloudlinux-x86_64-server-7 37 k | ||
| + | Installing for dependencies: | ||
| + | crit-lve x86_64 3.7-3.el7 cloudlinux-x86_64-server-7 9.6 k | ||
| + | criu-lve x86_64 3.7-3.el7 cloudlinux-x86_64-server-7 439 k | ||
| + | criu-lve-devel x86_64 3.7-3.el7 cloudlinux-x86_64-server-7 11 k | ||
| + | libnet x86_64 1.1.6-7.el7 cloudlinux-x86_64-server-7 58 k | ||
| + | protobuf-c x86_64 1.0.2-3.el7 cloudlinux-x86_64-server-7 27 k | ||
| + | protobuf-python x86_64 2.5.0-8.el7 cloudlinux-x86_64-server-7 129 k | ||
| + | python-criu-lve x86_64 3.7-3.el7 cloudlinux-x86_64-server-7 136 k | ||
| + | python-ipaddr noarch 2.1.11-1.el7 cloudlinux-x86_64-server-7 34 k | ||
| + | | ||
| + | Transaction Summary | ||
| + | ============================================================================================================================================================================= | ||
| + | Install 2 Packages (+8 Dependent packages) | ||
| + | </code> | ||
| + | |||
| <code>yum install ea-apache24-mod_lsapi</code> | <code>yum install ea-apache24-mod_lsapi</code> | ||
| Line 50: | Line 81: | ||
| Aug 20 19:24:25 globalsupport.litespeedtech.com criu[967641]: Warn (criu/kerndat.c:660): Can't load /run/criu.kdat | Aug 20 19:24:25 globalsupport.litespeedtech.com criu[967641]: Warn (criu/kerndat.c:660): Can't load /run/criu.kdat | ||
| + | ====CRIU Master Switch on LSWS ==== | ||
| + | CRIU is disabled by default. To enable it, you can go to LSWS Web Admin Console -> Server -> PHP -> PHP Global Configuration -> Enable CRIU( Again, we recommend you keep CRIU off unless you have some speical testing need only). | ||
| + | {{:litespeed_wiki:cloudlinux:lsws-master-criu-switch.png?800|}} | ||
| - | ====2. Check CRIU parameters==== | + | ==== Check CRIU parameters==== |
| In CloudLinux, LSPHP have been compiled with CRIU already. Please check [[https://docs.cloudlinux.com/index.html?criu_support.html|here]] \\ | In CloudLinux, LSPHP have been compiled with CRIU already. Please check [[https://docs.cloudlinux.com/index.html?criu_support.html|here]] \\ | ||
| Use ''phpinfo()'' with parameter ''-DWITH_CRIU'' to check the LSPHP build. | Use ''phpinfo()'' with parameter ''-DWITH_CRIU'' to check the LSPHP build. | ||
| Line 57: | Line 91: | ||
| - | ====3. Configure the PHP environment==== | + | ====Configure the PHP environment==== |
| Add the following necessary parameter to the PHPx.x **External App > Environment** \\ | Add the following necessary parameter to the PHPx.x **External App > Environment** \\ | ||
| <code> | <code> | ||