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Nginx configuration files become broken when set values to 0: invalid max_size value/invalid time value

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Mikhail Shport
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Plesk for Linux kb: fixed kb: bug ABT: Group A

Applicable to:

  • Plesk for Linux

Symptoms

When set Nginx Cache size and/or Cache timeout to 0 in Plesk > Domains > example.com > Apache & Nginx Settings > Enable Nginx caching Plesk shows a successful message:

CONFIG_TEXT: Information: The settings were successfully updated.

However, the configuration is broken:

  • The following errors are logged in the file /var/log/plesk/panel.log:

    CONFIG_TEXT: DEBUG [panel] Template_Exception: nginx: [emerg] invalid max_size value "max_size=" in /etc/nginx/plesk.conf.d/vhosts/example.com.conf:6
    nginx: configuration file /etc/nginx/nginx.conf test failed
    file: /usr/local/psa/admin/plib/Template/Writer/Webserver/Abstract.php
    line: 75
    code: 0
    trace: #0 /usr/local/psa/admin/plib/Template/Configuration/Applier.php(200): Template_Writer_Webserver_Abstract->test()
    ...
    #12 /usr/local/psa/admin/sbin/nginxmng(4): require_once(string '/usr/local/psa/admin/plib/api-cli/CliUtilityRunner.php')

  • The following error can be shown:

    PLESK_ERROR: New configuration files for the Apache web server were not created due to the errors in configuration templates: nginx: [emerg] invalid time value "" in /etc/nginx/plesk.conf.d/vhosts/example.com.conf:91 nginx: configuration file /etc/nginx/nginx.conf test failed

Cause

Product issue:

  • #PPPM-12428 "Improved the nginx cache size validation."
    Fixed in:

Resolution

Please consider updating your server:

Workaround

If update is not possible for some reason you may try the following

workaround

Set a value higher than 0:

  1. Connect to the server via SSH

  2. Create a list containing the domains with Nginx caching enabled:

    # mysql -uadmin -p`cat /etc/psa/.psa.shadow` -D psa -Ne "select d.id, d.name from domains d, dom_param dp, WebServerSettingsParameters ws where d.id = dp.dom_id and dp.param = 'webServerSettingsId' and dp.val = ws.webServerSettingsId and ws.name = 'nginxCacheEnabled' and ws.value = 'true'" > /tmp/domainsList.txt

  3. Identify the domains with a non-existing

    Cache size:

    # echo "-> START"; cat /tmp/domainsList.txt | while read ID DOM; do CHECK=`mysql -uadmin -p$(cat /etc/psa/.psa.shadow) -D psa -Ne "select d.id from domains d, dom_param dp, WebServerSettingsParameters ws where d.id = dp.dom_id and dp.param = 'webServerSettingsId' and dp.val = ws.webServerSettingsId and ws.name = 'nginxCacheSize' and d.id = $ID" | wc -l`; if [ $CHECK -eq 0 ]; then echo -e "--> Domain: $DOM\t ID: $ID"; fi; done; echo "-> FINISH"

    Cache timeout:

    # echo "-> START"; cat /tmp/domainsList.txt | while read ID DOM; do CHECK=`mysql -uadmin -p$(cat /etc/psa/.psa.shadow) -D psa -Ne "select d.id from domains d, dom_param dp, WebServerSettingsParameters ws where d.id = dp.dom_id and dp.param = 'webServerSettingsId' and dp.val = ws.webServerSettingsId and ws.name = 'nginxCacheTimeout' and d.id = $ID" | wc -l`; if [ $CHECK -eq 0 ]; then echo -e "--> Domain: $DOM\t ID: $ID"; fi; done; echo "-> FINISH"

    Note: The previous command will show an output as follows:

    CONFIG_TEXT: -> START
    --> Domain: example.com ID: 3
    -> FINISH

  4. Log into Plesk

  5. Go to Domains > example.com > Apache & Nginx Settings > Enable Nginx caching

  6. Set a value higher than 0 for Cache size/Cache timeout

  7. Click the OK button

    Note: Repeat steps 5-7 for all domains from the list that was fetched on step 3.

 

Event if bug already fixed there can be situation when values still set to 0 for domains and no records exist in Plesk database. In such case it is possible to launch the script below to set default values for Cache size (64Mb) and timeout (5 sec) for ALL domains with enabled Nginx caching:

# for i in `plesk db -N -e "select d.name from domains d, dom_param dp, WebServerSettingsParameters ws where d.id = dp.dom_id and dp.param = 'webServerSettingsId' and dp.val = ws.webServerSettingsId and ws.name = 'nginxCacheEnabled' and ws.value='true'"`; do plesk bin subscription --update-web-server-settings $i -nginx-cache-timeout 5 -nginx-cache-size 67108864;done

Comments

2 comments

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  • Avatar
    Gianluca (Edited )

    Hello, unfortunately this solution did not solve the problem for me.

    This is what i obtain on step 5 - 7: (the same happens if i clear the contents of "Additional nginx directives" field)

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  • Avatar
    Ivan Postnikov

    Hello Gianluca

    According to the error message, the configuration file  contains an invalid value for "max_size".

    Try the default one "max_size=67108864"

    The issue isn't connected with this article. The reported error just blocks any changes due to incorrect Nginx configuration.

     

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