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Copy file name to clipboardExpand all lines: docs/ubuntu/features/README.md
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## MySQL Governor
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MySQL Governor is software to monitor and restrict MySQL usage in a shared hosting environment. The monitoring is done
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via resource usage statistics per each MySQL thread.
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MySQL Governor is a software package that monitors and restricts MySQL usage in a shared hosting environment. The monitoring is done via resource usage statistics per each MySQL thread.
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MySQL Governor can also kill off slow SELECT queries.
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MySQL Governor has multiple modes of operations, depending on the configuration. It can work in monitor-only mode, or it
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can use different throttling scenarios.
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MySQL Governor has multiple modes of operations, depending on the configuration. It can work in monitor-only mode, or it can use different throttling scenarios.
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MySQL Governor allows restricting customers who use too many resources. It supports following limits:
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MySQL Governor allows restricting customers that use too many resources. It supports following limits:
| CPU | % | CPU speed relative to one core. 150% would mean one and a half cores |
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| READ | bytes | bytes read. Cached reads are not counted, only those that were actually read from disk will be counted |
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| WRITE | bytes | bytes written. Cached writes are not counted, only once data is written to disk, it is counted |
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You can set different limits for different periods: current, short, med, long. By default those periods are defined as 1
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second, 5 seconds, 1 minute and 5 minutes. They can be re-defined using
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the [configuration file](/cloudlinuxos/cloudlinux_os_components/#configuration-and-operation). The idea is
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to use larger acceptable values for shorter periods. Like you could allow a customer to use two cores (200%) for one
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second, but only 1 core (on average) for 1 minute, and only 70% within 5 minutes. That would make sure that customer can
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burst for short periods of time.
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You can set different limits for different periods: current, short, mid, long. By default those periods are defined as 1 second, 5 seconds, 1 minute and 5 minutes. They can be re-defined using the [configuration file](/cloudlinuxos/cloudlinux_os_components/#configuration-and-operation).
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The idea is to use larger acceptable values for shorter periods. Like you could allow a customer to use two cores (200%) for one second, but only 1 core (on average) for 1 minute, and only 70% within 5 minutes.
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That would make sure that customer can burst for short periods of time.
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When a customer is restricted, the customer will be placed into special LVE with ID 3. All restricted customers will be
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placed into that LVE, and you can control the amount of resources available to restricted customers. Restricted
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:::warning Attention!
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MySQL Governor on Ubuntu supports the following only:
No registration required! You can start working right after the installation.
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3. Run the script. Provide a key if your license is key-based:
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```shell
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python3 ubuntu2cloudlinux.py --key=your_key
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```
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If you have an IP-based license, pass the `--byip` option instead:
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```shell
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python3 ubuntu2cloudlinux.py --byip
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```
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The script will install the CloudLinux Subsystem on your Ubuntu machine. After the installation is complete, reboot your system.
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## Ubuntu2Cloudlinux explained
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The `ubuntu2cloudlinux.py` script gives an opportunity to install CloudLinux Subsystem For Ubuntu. It is a simplier script compared to the CLdeploy script for CentOS and AlmaLinux. For example, it doesn't replace the Linux kernel, only adds a dynamic module to it. Here is a list of actions done by the `ubuntu2cloudlinux`:
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The `ubuntu2cloudlinux.py` script installs the CloudLinux Subsystem For Ubuntu.
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It is a simpler script compared to the CLdeploy script for CentOS and AlmaLinux. For example, it doesn't replace the Linux kernel, only adds a dynamic module to it.
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Here is a list of actions that the `ubuntu2cloudlinux` script performs:
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*It checks that you are running the latest available version of the `ubuntu2cloudlinux.py script`, and updates itself if necessary.
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*Checks that you are running the latest available version of the `ubuntu2cloudlinux.py script`, and updates itself if necessary.
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* Upgrades all installed packages to the latest versions (unless the `--skip-full-update` option is passed).
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* Adds CloudLinux repositories for Ubuntu and a corresponding gpg key to your system.
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* Registers your system with the CloudLinux Network (CLN) using the provided key or IP address.
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* Adds CloudLinux repositories for Ubuntu and a corresponding GPG key to your system.
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* Installs a minimum set of CloudLinux OS components: lve, kernel module kmodlve-dkms, lve-utils, lve-stats, alt-python.
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* Installs CloudLinux Manager (currently works with cPanel on Ubuntu).
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* Installs the mod_hostinglimits Apache module.
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* Asks you to manually reboot the system to load a new kernel module.
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* Asks you to manually reboot the system to load the new kernel module.
Copy file name to clipboardExpand all lines: docs/ubuntu/introduction/README.md
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*[Ubuntu](https://ubuntu.com/) is a registered trademark of Canonical Ltd.
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:::
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CloudLinux subsystem on Ubuntu is a scope of deb-packages which allows using CloudLinux features on Ubuntu OS. It is a Stable version of a free extension designed exclusively for Ubuntu® 20.04 LTS users.
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CloudLinux subsystem on Ubuntu is a scope of deb-packages which allows using CloudLinux features on Ubuntu OS. It is a Stable version of a free extension designed exclusively for Ubuntu® 22.04 LTS users.
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## Supported version of Ubuntu
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We support Ubuntu 20.04 LTS.
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We support Ubuntu 22.04 LTS.
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## CloudLinux OS editions comparison
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CloudLinux Subsystem for Ubuntu supports the same editions as CloudLinux OS, with some exceptions.
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In the table below, a feature marked with "No" for the CloudLinux Subsystem for Ubuntu means that no edition of CloudLinux Subsystem for Ubuntu supports this feature.
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|**Features**|**CloudLinux OS Solo**|**CloudLinux OS Admin**|**CloudLinux OS Legacy (Shared)**|**CloudLinux OS Shared Pro**|**<fontcolor="#2c98f0">CloudLinux Subsystem For Ubuntu</font>**|
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|:-:|:-:|:-:|:-:|:-:|:-:|
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\** Limits are disabled by default.
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\*** Python/Node.js/Ruby Selectors are available only for cPanel, DirectAdmin servers, and servers with custom panel with own integration.
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\*** Python/Node.js/Ruby Selectors are available only for cPanel, DirectAdmin, and servers with custom panels with own integration.
Copy file name to clipboardExpand all lines: docs/ubuntu/troubleshooting/README.md
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To troubleshoot and resolve issues, you can use the following log files:
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```
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/var/log/ubuntu2cloudlinux.log - conversion log
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/var/log/lve-stats.log - lve-stats
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/var/log/dmesg - kernel module
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/var/log/ubuntu2cloudlinux.log - conversion log
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/var/log/lve-stats.log - lve-stats
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/var/log/dmesg - kernel module
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```
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## Knows Issues
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## Known issues
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1. Please take into account that if one of the [`alt-python37*` packages](/sub-system-ubuntu/troubleshooting/#list-of-alt-python37-packages) is updated, you should execute the following command to ensure the proper functionality of the LVE-stats daemon:
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```
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/sbin/service lvestats try-restart
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```
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#### List of alt-python37* packages:
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* alt-python37
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* alt-python37-raven
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* alt-python37-simplejson
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* alt-python37-sqlalchemy
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* alt-python37-alembic
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* alt-python37-libs
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* alt-python37-markupsafe
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* alt-python37-setuptools
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* alt-python37-contextlib
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* alt-python37-mako
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* alt-python27-cllib
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* alt-python37-prettytable
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* alt-python37-logilab-common
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* alt-python37-jinja2
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* alt-python37-psycopg2
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* alt-sqlite
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Behavior like this will be fixed in the upcoming versions.
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2. LVE statistics work only with SQLite, other databases (e.g. MySQL, postgreSQL) will be available in the following releases.
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3.`alt-php*-zts` packages are not available yet.
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4. The `tmpreaper package` is used instead of `tmpwatch`.
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5. PNG format for LVE Charts does not work correctly on CloudLinux subsystem on Ubuntu (lvechart utility may produce broken images).
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1.`alt-php*-zts` packages are not available at the moment.
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2. The `tmpreaper package` is used instead of `tmpwatch`.
* Remove the CloudLinux OS components which are installed on your system, choosing from the following list: lve, kmodlve-dkms, lve-utils, lve-stats, lvemanager, cagefs, alt-python, alt-php, db-governor.
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* Remove the CloudLinux OS components which are installed on your system, going over the following list: lve, kmodlve-dkms, lve-utils, lve-stats, lvemanager, cagefs, alt-python, alt-php, db-governor.
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* Remove configs for CloudLinux repositories for Ubuntu.
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* Ask you to check for remaining packages from CloudLinux and manually reboot your system.
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