In case you have been low on disk space on your Elasticsearch instance, there is high probability that your indices are marked read only now. In order to fix this one, first either delete/archive indices or increase your disk space. After that restart Elasticsearch and Kibana and navigate to Management – Dev Tools and execute the following: This should bring indices back to be writable once again.
In one of my previous posts I mentioned some troubles regarding reinstalling Ubuntu 22, loosing ability to select OS and to boot at all actually. I found that Ubuntu 20 recognizes properly my fresh Windows installation but Ubuntu 22 does not. So I stayed with version 20 however here was no OS selection, which translates to broken GRUB installation. After Ubuntu 20 installation finished it tried to put bootloader but failed to do this because of drives numbering. My first drive in Lenovo Thinkpad T420s is mSATA but computer and operating system thinks that this is my second drive. My
There are two ways of expanding your root filesystem space. It’s either by adding additional volumes or by resizing PV. Let’s try the latter. We have CentOS 7 wth XFS running on Proxmox. First expand drive size with admin UI. Next: At first after resizing drive you will see in lsblk that the drive should have additional space. At growpart you will see your partition expands. At pvresize there is no change. Change happens on lvextend, so you will see you LVM increases in space. To see filesystem change in df you need to run either xfs_growfs or resize2fs depending
I have dual boot on my Lenovo Thinkpad T420s, Windows 10 and Ubuntu 22. Actually I had, because I tried to reinstall Ubuntu 22 and I’ve lost my dual boot and ability to boot at all. So I tried few things: reformat manually EFI and root partitions os-prober and update-grub setting root and prefix at grub rescue grub-install Windows installation troubleshooting Unfortunately it does not work. Something went terribly wrong. To bring back Windows first boot from installation media and go for command prompt: This way I was able to boot into Windows once again, but unable to do it
I was replacing drives and memory in one of servers and out of a sudden node was unable to start. When finally it booted it was gone out of cluster. Weird. This node has been installed on SSD drive which had 2 years or constant runtime. Debian prompted with some file system issue at one and another time. After few reboots finally it booted successfuly but node was unable to communicate properly with other cluster members. I tried to start time synchro from the stratch to no avail. I pulled out other drives than this one with operating system without
During installation Ubuntu will create LVM with half of the space available. In order to expand it to whole space available you need to extend logical volume and expand file system as follow:s
Display geo location map for NGINX traffic logs in Kibana Summary There are 3 things to remember and configure in order to have geo location map working: Use “forwardfor” option on pfSense HAProxy TLS frontend Enable filebeat NGINX module and point particular log files Define custom NGINX log format This guide relates to Ubuntu Linux setup. Elasticsearch 7 First install Elasticsearch 7 as follows. Note: for more resilent setup install more than one Elasticsearch server node and enable basic security. For sake of clarity I will skip these two aspects which will be covered by another article. Kibana Then install
Among 3 million public IP address ranges for the whole world, 68k belongs to the Russian Federation. This translates into 45 million addresses. Scanning the HTTP port on this population took 20 hours. I obtained 630k IP addresses with listening on port 80. Of which 530k gives the correct answer of the HTTP type. Only 340k gives an HTTP 200 response. Over 200k run on NGINX servers, and 100k run on Apache. When analyzing the content, you will find GitLab, Kibana, Zabbix or Grafana installations open for registration and use, but also copies of databases, video surveillance systems, etc. My
The basis for the construction of diodes and transistors A semiconductor is a material whose electrical conductivity is between the conductors and insulators. Their resistance and conductivity depends on temperature and admixtures. [W] The most commercially used semiconductors are those based on silicon, and in the past also on germanium. In addition to these two elements (in crystalline form), a whole spectrum of other substances from groups 13-15 is used, which can form two, three or four-element compounds. P-n junction The basic element of a semiconductor system [003] Additions of atoms of other elements are used to obtain the increased