Oleksandr IegorovHow to upgrade ElasticSearch and fail safe (if ever fail)Some time ago we completed project to upgrade ElasticSearch version 2 to version 5. And although it was a lot of fun and experience, I did…May 12, 20201May 12, 20201
Oleksandr IegorovMail filtering through Procmail : exit code handlingProcmail never tells MTA about a failure in running its filters. Needed to change that and here is what I did.May 5, 2020May 5, 2020
Oleksandr IegorovDocker volumes changes in compose version 3How to adjust docker volumes in compose v2 to docker-compose v3. Local and bind mount changes explained on an example.Apr 3, 2020Apr 3, 2020
Oleksandr IegorovRsyslogd configuration changes to enable local logging for CentOS7 in dockerRsyslogd local logging works out of box in CentOS6, but not in CentOS7. Here is what you can do about itMar 12, 20201Mar 12, 20201
Oleksandr IegorovSendmail and header information enrichmentSendmail used to be one of the most popular MTAs a decade go. However, it can prove to be pretty flexible and configurable even now.Feb 25, 2020Feb 25, 2020
Oleksandr IegorovHow to compile kernel module for CentOS8I badly needed to emulate usb device in linux, there was no guide avaialable for CentOS8. So I decided to create one. Hope it helps.Feb 11, 20203Feb 11, 20203