Many cloud providers not allows uploading ISOs and not provides any option for install custom OS. This is not a problem, because I’ll show you how you can prepare Mikrotik VM on any cloud in easy 5 steps.
Zabbix have some problems with memory collecting from cgroups limited containers. If you using Promxox, you know what I mean: The available memory collected worng without calculating buffers and cache memory. Zabbix have bug report, but it seems that no one don’t want to fix it soon. So let’s fix it together byself.
- Run communityserver container, and get
docker run -name communityserver -i -t -d onlyoffice/communityserver` # wait 1-2 minutes. sudo docker exec -i -t communityserver /bin/bash -c 'cat /etc/nginx/sites-enabled/onlyoffice' > onlyoffice.conf` sudo docker rm -fv communityserver
This time I would like to tell how to configure this subject, in a particular each separate component as a result to receive the own, expanded, otkazoustoycheavy cloud based on OpenNebula. In this article I will consider the next moments:
- Install Ceph, distributed storage. (I will describe the installation of a two-tier storage with a caching pool of SSDs)
- Install MySQL, Galera Cluster with master replication
- Installing OpenvSwitch soft switch
- Installing directly OpenNebula itself
- Configuring Failover Cluster
- Initial configuration
The topics themselves are very interesting, so even if you are not interested in the final goal, but you are interested in setting up a separate component. You are welcome under the cut.
I decided to try ZFS here the other day, but I did not find a detailed and simple manual on how to implement it on CentOS, I decided to correct the situation. In addition, I wanted to install all this in EFI mode. - not to stand still? And at the same time understand for yourself how DKMS works, as well as aspects of manual installation of RPM-based distributions. ZFS was not chosen by chance either, since it was planned to deploy a hypervisor on this machine and use zvol to store images of virtual machines. I wanted something more than a software raid + lvm or simple file storage of images, something like ceph, but for one host this is too bold. Looking ahead to say that I was very pleased with this file system, its performance and all its chips.
Previously, I quite often had a situation where you simultaneously work in a terminal and, for example, in a browser. After several hours of work, you start to get confused and in the terminal instead of [Ctrl] + [Shift] + [C], press [Ctrl] + [C], and vice versa in the browser. As a result, in the terminal you get an interrupt and in the browser, instead of the expected effect, your debugger is slowly loaded. One fine moment it got me and I decided it was time to change something…