79 lines
2.3 KiB
ReStructuredText
79 lines
2.3 KiB
ReStructuredText
Logging
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=======
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Logging with the systemd journal (CentOS, Amazon AMI, Ubuntu, Debian)
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---------------------------------------------------------------------
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On distributions with systemd, ScyllaDB logs are written to the `systemd journal <http://www.freedesktop.org/software/systemd/man/systemd-journald.service.html>`_. You can retrieve log entries with the `journalctl <http://www.freedesktop.org/software/systemd/man/journalctl.html>`_ command.
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Listed below are a few useful examples.
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* get logs generated by the "scylla" user:
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.. code-block:: shell
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journalctl _UID=`id -u scylla`
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* get logs generated by the "scylla" command:
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.. code-block:: shell
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journalctl _COMM=scylla
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* filter only ScyllaDB logs by priority:
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.. code-block:: shell
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journalctl _COMM=scylla -p err..emerg
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.. code-block:: shell
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journalctl _COMM=scylla -p warning
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* filter only ScyllaDB logs by date:
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.. code-block:: shell
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journalctl _COMM=scylla --since="2013-3-16 23:59:59"
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.. code-block:: shell
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journalctl _COMM=scylla --since "2015-01-10" --until "2015-01-11 03:00"`
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.. code-block:: shell
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journalctl _COMM=scylla --since yesterday
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* filter only ScyllaDB logs since last server boot:
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.. code-block:: shell
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journalctl _COMM=scylla -b
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Logging on Ubuntu 14.04
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-----------------------
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On Ubuntu 14.04, ScyllaDB writes its initial boot message into :code:`/var/log/upstart/scylla-server.log`.
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After ScyllaDB has started, logs are stored in :code:`/var/log/syslog`. ScyllaDB logs can be filter by creating a :code:`rsyslog` configuration file with the following rule (for example, in :code:`/etc/rsyslog.d/10-scylla.conf`)
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.. code-block:: shell
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:syslogtag, startswith, "scylla" /var/log/scylla/scylla.log
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& ~
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And then creating the log file with the correct permissions and restarting the service:
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.. code-block:: shell
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install -o syslog -g adm -m 0640 /dev/null /var/log/scylla/scylla.log
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service rsyslog restart
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This will send ScyllaDB only logs to :code:`/var/log/scylla/scylla.log`
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Logging on Docker
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-----------------
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Starting from ScyllaDB 1.3, `ScyllaDB Docker <https://hub.docker.com/r/scylladb/scylla/>`_, you should use :code:`docker logs` command to access ScyllaDB server and JMX proxy logs
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.. include:: /rst_include/advance-index.rst
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