There are 3 types of log files:

system logs, which rely on log administration mechanisms (rsyslog + logrotate)
BlueMind's Java services log, which rely on LogBack
Track times
Java-generated tracks in these files are set to GMT.
As a result, in France, which is in the Europe/Paris time zone, times are +1h in the winter and +2h in the summer. To find items that took place at 15:00, you need to look for:
- 14:00 from late October to late March
- 13:00 from late March to late October
internal service logs, managed by each service's configuration.

Storage time depends on each log administration mechanism's settings. These settings can be changed to the desired storage time.

Log files

Les fichiers journaux se trouvent dans le dossier /var/log et ses sous-dossiers

Component	Package Name	Log File	Type	Description
BlueMind Core	bm-core	./bm/core.log	LogBack	Main BlueMind service: manages database contents implements job rules ...
Postfix	postfix	RedHat: ./maillog Debian/Ubuntu: ./mail.err ./mail.info ./mail.log ./mail.warn	System	Postfix forwarding service which sends emails to recipients' mailbox or server.
Cyrus	bm-cyrus-imapd	RedHat: ./maillog Debian/Ubuntu: ./mail.err ./mail.info ./mail.log ./mail.warn	System	Cyrus IMAP mail service. Permet de: place an email in the corresponding mailbox and access it through IMAP and/or POP. filter emails on reception manage away message manage redirects
Webmail	bm-webmail	./bm-webmail/ : errors sendmail mailSent.log	LogBack	errors from the webmail service (Round Cube). keeps track of all sent messages as well as rules applied to these messages (alias, redirection, etc.).
Proxy IMAP	bm-ips	./bm-ips/ips.log	LogBack	Tracks IMAP operations (moved files, deletions, etc.), including when they are carried out from BlueMind webmail
Synchronisation EAS	bm-eas	./bm-eas/eas.log	LogBack	Tracks operations carried out to and from mobile devices connected through EAS. In addition, logs for each synchronization file are stored in separate files, which makes the analysis of bugs or erroneous behavior easier.
Mail forwarding	bm-lmtpd	./bm-lmtpd/lmtpd.log	LogBack	Service that delivers emails to the corresponding mailbox. Some BlueMind-related operations are carried out here - ICS invitation analysis, for example.
Localization	bm-locator	./bm-locator/locator.log	LogBack	Locate user-specific services (mailbox server, etc.)
Identification	bm-node	./bm-node/node.log	LogBack	Service that allows the BM-Core server to run system operations on the BlueMind architecture nodes. The log file tracks commands.
BlueMind web server	bm-webserver	./bm-webserver/ : dav.log js-errors.log setup.log webserver.log	LogBack	Directory containing log files generated by the webserver service. Includes calendar synchronization tracking.
Authentication	bm-hps	./bm-hps/hps.log	LogBack	Tracks successful authentications, authentication issues and sessions started
Tika	bm-tika	./bm-tika/tika.log	LogBack	Extracts metadata and document data for the ES index. Tracks information indexing extraction errors.
PHP FPM	bm-php-fpm	./bm-php-fpm: bm-php-fpm.log slow.log	LogBack	PHP interpreters. The `slow.log` file contains PHP requests longer than 15s.
ElasticSearch	bm-elasticsearch	./bm-elasticsearch	Interne	ElasticSearch service logs. `*_slowlog.log` files contain slow requests. Possible log configuration modifications to this service may be lost after a BlueMind update.
Milter	bm-milter	./bm-milter/milter.log	LogBack	SMTP analysis and modification of emails.
XMPP	bm-xmpp	./bm-xmpp/xmpp.log	LogBack	Instant messaging logs.
YSNP	bm-ysnp	./bm-ysnp/ysnp.log	LogBack	Service that allows Postfix or Cyrus to obtain or verify data with BlueMind: SMTP and IMAP authentication ACLs IMAP ACLs resolution blocks mail flows when BlueMind is under maintenance or being updated
PostgreSQL	bm-postgresql	./postgresql	Interne+logrotate	PostgreSQL database logs. This component's configuration can be edited using the file /etc/postgresql/9.6/main/postgresql.conf.local
NGinx	bm-nginx	./nginx: access.log error.log webmail.log	Interne+logrotate	The NGinx services allows HTTP and HTTPs access to BlueMind. `access.log` contains all HTTP and HTTPs requests made to BlueMind `error.log` contains all HTTP and HTTPs error requests or request whose return code shows an error (4xx, 5xx) `webmail.log` contains all HTTP and HTTPs requests made through webmail or error requests or requests whose return code shows an error (4xx, 5xx)

LogBack configuration

By default, configuration files are located in the directory /usr/share/bm-conf/logs/:

bm-core-audit.log.xml
bm-core.log.xml
bm-eas.log.xml
bm-hps.log.xml
bm-ips.log.xml
bm-lmtpd.log.xml
bm-locator.log.xml
bm-milter.log.xml
bm-node.log.xml
bm-pimp.log.xml
bm-tika.log.xml
bm-webserver.log.xml
bm-xmpp.log.xml
bm-ysnp.log.xml

To edit them, copy the file you want to edit into /etc/bm/local and edit the copy.

Configuration example:

<appender name="R" class="ch.qos.logback.core.rolling.RollingFileAppender">
  <!--See also http://logback.qos.ch/manual/appenders.html#RollingFileAppender -->
  <File>/var/log/bm/core.log</File>
  <encoder>
    <pattern>%d [%thread] %c{1} %p - %m\n</pattern>
  </encoder>
  <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
    <maxIndex>20</maxIndex>
    <FileNamePattern>/var/log/bm/core.log.%i.gz</FileNamePattern>
  </rollingPolicy>
  <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
    <MaxFileSize>60000KB</MaxFileSize>
  </triggeringPolicy>
</appender

In the example above, the main log file core.log can keep 20 log files of 60Mb each at the most.

For more information about configuration, please refer to the site Log4j or the following documentation: https://logback.qos.ch/manual/appenders.html#RollingFileAppender

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