Fatal error: $CFG->dataroot is not writable, moodle

Fatal error: $CFG->dataroot is not writable Today I ran into the same error. After a while i got the idea. On any linux box such as Red Hat, Cent OS, fedora and Co there is a pretty good likelihood that SELinux is enabled and enforced. First of all you should check the directory and file permissions. Being at least accessible and readable to the web server - most often apache. Dirs and files should be owned by apache:apache. The SELinux is quite consequent. I therefore ran into this issue after relabelling the system. In case that after permission setting the web server still does complain about „$CFG->dataroot not writable“ look at the SELinux labels of the dirs and files in $CFG->dataroot. They are displayed with the CLI ls -lZ /full_path_of_dataroot All labels should be apache apache unconfined_u:object_r:httpd_sys_rw_content_t:s0 4096 1. Dez 14:21 cache The httpd_sys_rw_content shows that the dir or file is writeable. In case this is not given execute sudo chcon -R -t httpd_sys_rw_content_t /full_path_of_dataroot This will change the file context recursively to the type httpd read/write. Reload the webpage.

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Solution to Moodle Error: Coding error detected, it must be fixed by a programmer: Failed to unserialise data from file. Either failed to read, or failed to write.

Did you ever come across the following error when you try to access Moodle,

"Coding error detected, it must be fixed by a programmer: Failed to unserialise data from file. Either failed to read, or failed to write."

This usually happens when cache files are corrupted, one probable cause can be improper shutdown of Moodle system.

Here is the solution to fix the issue.

1. Go to Moodle root directory
    #cd /var/www/html/moodle
  
2. Run the command  
   #php admin/cli/purge_caches.php

3. Go to moodledata/cache directory

  #cd /var/moodledata/cache

  

4. Remove the cache store directory, DO NOT remove of change the core_component.php file

   # rm -rf cachestore_file/

5. Refresh the Moodle Page. Its should work


Source : https://sjamso.blogspot.com/2018/08/solution-to-moodle-error-coding-error.html

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moodle chroot error

klick perintah

setenforce 0

https://webmasters.stackexchange.com/questions/61508/moodle-error-fatal-error-cfg-dataroot-is-not-writable-admin-has-to-fix-dir

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ganti ip ke domain moodle

Edit DNS domain dari ip adress ke moodle ada peringatan

"Incorrect access detected, this server may be accessed only through "http://124.40.255.XXX/moodle" address, sorry.

Please notify server administrator.

This page should automatically redirect. If nothing is happening please use the continue link below.

Continue"

Solusi

ganti wwwroot nya di config.php

dengan $CFG->wwwroot   = 'http://' . $_SERVER['HTTP_HOST'];

Link : http://stackoverflow.com/questions/25879299/moodle-apache-proxy

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