Install How to troubleshoot Centmin Mod initial install issues

Centmin Mod is provided as is without support. I only work on Centmin Mod in my free time. So users feel free to help each other out which is the ideal goal of this community forum

Centmin Mod Logs

However, to properly troubleshoot and diagnose Centmin Mod initial install issues start a new thread in Install & Upgrades or Pre-Install Questions forums and share/look at the initial install logs which are automatically created when you run initial install menu option #1 or when you run any of the CLI install methods (from 1.2.3-eva2000.07 beta and onwards). These install logs are automatically created as per FAQ 7 outline at Centmin Mod FAQ - Menu based Nginx installer. If this is a nginx only centmin.sh menu option 4 issue, use this guide/steps instead at Install - Nginx - How to troubleshoot Nginx installs/upgrades.

For 123.08stable and older, logs would be formatted as centminmod_1.2.3-eva2000.07_230514-155845_install.log.

For example in 123.09beta01 and higher, initial install log listed below is at /root/centminlogs/installer_120718-075613.log and there's an minimal installer log at /root/centminlogs/installer_120718-083445_minimal.log which strips some of the entries for unimportant stuff

Code (Text):

ls -lhrt /root/centminlogs/
total 12M
-rw-r--r-- 1 root root  11K Jul 12 08:00 centminmod_123.09beta01.b035_120718-080010_yuminstall_centos7.log
-rw-r--r-- 1 root root  12K Jul 12 08:00 centminmod_yumtimes_120718-080010.log
-rw-r--r-- 1 root root   37 Jul 12 08:00 centminmod_profiletimes_120718-080010.log
-rw-r--r-- 1 root root 2.2K Jul 12 08:00 cmm-login-git-checks_120718-080056.log
-rw-r--r-- 1 root root  78K Jul 12 08:01 centminmod_downloadtimes_120718-080010.log
-rw-r--r-- 1 root root 1.3K Jul 12 08:01 securedtmp.log
-rw-r--r-- 1 root root  584 Jul 12 08:01 patch_opensslpatches_120718-080010.log
-rw-r--r-- 1 root root   44 Jul 12 08:02 centminmod_opensslinstalltime_120718-080010.log
-rw-r--r-- 1 root root    8 Jul 12 08:02 patch_patchnginx_120718-080010.log
-rw-r--r-- 1 root root 2.1K Jul 12 08:03 gcc_native.log
-rw-r--r-- 1 root root 7.7K Jul 12 08:03 nginx-configure-120718-080010.log
-rw-r--r-- 1 root root 2.7M Jul 12 08:05 centminmod_ngxinstalltime_120718-080010.log
-rw-r--r-- 1 root root 9.5K Jul 12 08:06 setio_innodbstatus-before-120718-080646.log
-rw-r--r-- 1 root root  784 Jul 12 08:06 centminmod_setio_120718-080646.log
-rw-r--r-- 1 root root 9.5K Jul 12 08:06 setio_innodbstatus-after-120718-080646.log
-rw-r--r-- 1 root root 2.3K Jul 12 08:07 gcc_php_native.log
-rw-r--r-- 1 root root   58 Jul 12 08:10 centminmod_phpinstalltime_120718-080010.log
-rw-r--r-- 1 root root  470 Jul 12 08:10 zendopcache_passfile.txt
-rw-r--r-- 1 root root  28K Jul 12 08:13 centminmod_123.09beta01.b035_120718-080010_yum-log.log
-rw-r--r-- 1 root root  125 Jul 12 08:13 install.utc.time.log
-rw-r--r-- 1 root root 4.2M Jul 12 08:13 centminmod_123.09beta01.b035_120718-080010_install.log
-rw-r--r-- 1 root root 4.3M Jul 12 08:13 installer_120718-075613.log
-rw-r--r-- 1 root root 826K Jul 12 08:13 installer_120718-083445_minimal.log
-rw-r--r-- 1 root root    8 Jul 12 08:13 getcmtime_installtime_120718-075613.log
-rw-r--r-- 1 root root   56 Jul 12 08:13 firstyum_installtime_120718-075613.log
-rw-r--r-- 1 root root  793 Jul 12 08:13 install_time_stats_120718-075613.log
-rw-r--r-- 1 root root 4.7K Jul 12 08:13 sar-u-installstats.log
-rw-r--r-- 1 root root 4.2K Jul 12 08:13 sar-q-installstats.log
-rw-r--r-- 1 root root 6.5K Jul 12 08:13 sar-r-installstats.log
-rw-r--r-- 1 root root 5.9K Jul 12 08:13 sar-d-installstats.log
-rw-r--r-- 1 root root 3.7K Jul 12 08:13 sar-b-installstats.log
-rw-r--r-- 1 root root 2.2K Jul 12 08:13 yum-timedhosts.txt

For downloading the install log you can compress it via gzip first. Change installer_120718-075613.log to name of your installer_*.log

Code (Text):

cd /root/centminlogs
pigz -11k installer_120718-075613.log
pigz -11k installer_120718-083445_minimal.log

end result is a .gz compressed copy of your log file to download. Uncompressed size = 4.3MB while gzip compressed copy is just 208KB ! and minimal log from 826KB to 95KB in size

Code (Text):

ls -lah /root/centminlogs/installer*
-rw-r--r-- 1 root root 4.3M Jul 12 09:06 /root/centminlogs/installer_120718-083445.log
-rw-r--r-- 1 root root 208K Jul 12 09:06 /root/centminlogs/installer_120718-083445.log.gz
-rw-r--r-- 1 root root 826K Jul 12 09:06 /root/centminlogs/installer_120718-083445_minimal.log
-rw-r--r-- 1 root root  95K Jul 12 10:20 /root/centminlogs/installer_120718-083445_minimal.log.gz

---

Installer Summary Links Log

As at December 25th, 2021, added a new /root/centminlogs/installer_summary_links.log summary log which is a text file that links to the initial install's important log files for easier referencing and troubleshooting. Example contents of /root/centminlogs/installer_summary_links.log:

Code (Text):

Full initial install log: /root/centminlogs/installer_071221-010436.log
Minimal initial install log: /root/centminlogs/installer_071221-010436_minimal.log
Initial install time stats: /root/centminlogs/install_time_stats_071221-010436.log
Initial install nginx configure options: /root/centminlogs/nginx-configure-071221-010927.log
Initial install sar stats:
/root/centminlogs/sar-b-installstats.log
/root/centminlogs/sar-d-installstats.log
/root/centminlogs/sar-r-installstats.log
/root/centminlogs/sar-q-installstats.log
/root/centminlogs/sar-u-installstats.log

Sharing logs and errors

You can use Pastebin.com or Gists to share a sanitised version of the contents of the install or error messages if you need for them to be properly formatted or if error message or logs are very long and not able to be posted here on the community. When I mean sanitised, the install log now contains some generated passwords which you may want to remove from the log prior to sharing in public. To find the passwords, you can search for the words within install.log with the added semi-colon included:

Code:

password:

Then remove those passwords from the log.

Server Logs

Server logs include Nginx, PHP-FPM, MariaDB MySQL error logs as well as others. You can find your Centmin Mod install/menu logs at FAQ 7 and server logs at FAQ 19 at Centmin Mod FAQ - Menu based Nginx installer (most up to date info in FAQ so always read that first). Spoiler tag below has info too but may not be up to date.

Spoiler

Some of Centmin Mod's installed software will have their own access and error logs which maybe useful for diagnosing errors or give info, notes, or warning notices.

Note: There's no support provided by me for diagnosing such errors which may occur for various reasons including misconfiguration of installed php/mysql scripts or applications.

In SSH2 telnet you can use tail command to view the last X number of lines in the file.

For example for viewing last 10 lines in the file for:

For Nginx access and error logs:

Code:

  tail -10 /usr/local/nginx/logs/access.log
  tail -10 /usr/local/nginx/logs/error.log

For specific domainname.com access and error log:

Code:

  tail -10 /home/nginx/domains/domainname.com/log/access.log
  tail -10 /home/nginx/domains/domainname.com/log/error.log

For other system error logs located at /var/log:

list /var/log files in ascending time order so the most recently modified files are at the bottom

Code:

  ls -lhrt /var/log

Code:

total 2.7M
-rw------- 1 root  root    0 Aug 29 15:33 tallylog
-rw------- 1 root  root    0 Aug 29 15:33 spooler
drwx------ 3 root  root 4.0K Aug 29 15:35 samba
drwxr-xr-x 2 root  root 4.0K Aug 29 15:35 mail
-rw-r--r-- 1 root  500     0 Oct  8 18:13 dmesg.old
-rw------- 1 root  500     0 Oct  8 18:13 boot.log
-rw-r--r-- 1 root  500     0 Oct  8 18:14 dmesg
drwx------ 2 root  root 4.0K Oct  8 18:14 httpd
drwxr-xr-x 2 root  root 4.0K Oct  8 19:08 php-fpm
-rw-rw---- 1 mysql root 2.3K Oct  9 12:38 mysqld.log
-rw------- 1 root  root 9.2K Oct 26 10:48 yum.log
-rw------- 1 root  utmp  94K Nov  7 22:59 btmp
drwxr-xr-x 2 root  root 4.0K Nov  8 00:00 sa
-rw------- 1 root  root 269K Nov  8 21:39 messages
-rw------- 1 root  root 110K Nov  8 23:08 secure
-rw-rw-r-- 1 root  utmp  43K Nov  8 23:08 wtmp
-rw-r--r-- 1 root  root 144K Nov  8 23:08 lastlog
-rw------- 1 root  root  69K Nov  8 23:08 lfd.log
-rw------- 1 root  root 332K Nov  8 23:08 maillog
-rw------- 1 root  500  1.6M Nov  8 23:10 cron

For PHP-FPM error log:

Code:

  tail -10 /var/log/php-fpm/www-error.log

and/or

Code:

  /var/log/php-fpm/www-php.error.log

For MySQL / MariaDB error log:

Code:

  tail -10 /var/log/mysqld.log

For CSF firewall LFD log:

Code:

  tail -10 /var/log/lfd.log

For Mail log:

Code:

  tail -10 /var/log/maillog

For Cron job logs:

Code:

  tail -10 /var/log/cron

Nginx Pagespeed Troubleshooting

Full details at Nginx PageSpeed - Nginx Pagespeed Troubleshooting steps | Centmin Mod Community

Also share relevant info including:

• VPS type ? Xen, KVM, OpenVZ, VMWare ?
• Amount of memory ?
• which build of Centmin Mod .07 stable or .08 beta ?
• Nginx version used ? Output from command

Code:

nginx -V

 

Additional Notes

• Most common initial install error will be with broken download urls due to changes in the download url location or for YUM repos the release RPM version number is updated. You can see all download urls Centmin Mod looks for at /inc/downloadlinks.inc for 123.08stable and /inc/downloadlinks.inc for 123.09beta01.

 

123.09beta01 additional installer log

On July 12, 2018 updated Centmin Mod 123.09beta01 to extend the initial installer logging into log file /root/centminlogs/installer_*.log where * is date timestamp and also a minimal installer log which is less verbose and smaller at /root/centminlogs/installer_*_minimal.log

You can use Pastebin.com or Gists to share a sanitised version of the contents of the install or error messages if you need for them to be properly formatted or if error message or logs are very long and not able to be posted here on the community. When I mean sanitised, the install log now contains some generated passwords which you may want to remove from the log prior to sharing in public.

 

Installer Summary Links Log

As at December 25th, 2021, added a new /root/centminlogs/installer_summary_links.log summary log which is a text file that links to the initial install's important log files for easier referencing and troubleshooting. Example contents of /root/centminlogs/installer_summary_links.log:

Code (Text):

Full initial install log: /root/centminlogs/installer_071221-010436.log
Minimal initial install log: /root/centminlogs/installer_071221-010436_minimal.log
Initial install time stats: /root/centminlogs/install_time_stats_071221-010436.log
Initial install nginx configure options: /root/centminlogs/nginx-configure-071221-010927.log
Initial install sar stats:
/root/centminlogs/sar-b-installstats.log
/root/centminlogs/sar-d-installstats.log
/root/centminlogs/sar-r-installstats.log
/root/centminlogs/sar-q-installstats.log
/root/centminlogs/sar-u-installstats.log

 

Sharing Logs Via Dropbox

You can also share the relevant required log files outlined above via Dropbox send via email feature at https://community.centminmod.com/threads/using-dropbox-to-share-server-files.22327/