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{{header|docs}}
{{header|docs}}


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=systemd changes=
===systemctl===
====Filtering by unit state====
`systemctl` now supports filtering the unit list output by load state. The --state option will accept any value or a comma-separated list values of LOAD, SUB, or ACTIVE states. For example:
systemctl --state failed


===journalctl===
== storaged replaces udisks2 ==
====Viewing the logs of a specific boot====
`journalctl -b` can be used to look for boot output of a specific boot. For example:
journalctl -b # output from current boot
journalctl -b -1 #output from previous boot


In addition to relative boot sequence, journalctl assigns a 128bit boot ID that can be referenced. For example,
The `udisks2` package provides dynamic storage management functionality to legacy Fedora systems.  Most prominently, desktop environments like GNOME udisks to handle removable media, such as USB thumb drives, via a dbus interface.
journalctl -b  38fd9c3303574ed38e822233457f6b77 # output from a specific designated boot


===Referencing the journal with 'cursors'===
Because udisks2 does not support more complex storage technologies such as LVM or iSCSI, it is being replaced in Fedora 25 by `storaged`, an enhanced fork of the udisks project.  `storaged` is a drop-in replacement for `udisks2`, and the additional functionality allows administrators to use software like `Cockpit` in Fedora Server to manage these advanced storage resources.
journalctl can reference the contents of the journal by a record identifier known as a 'cursor'. Similar to a git hash, the cursor uniquely identifies a point in the journal.
If you add --show-cursor to a journalctl query, the last line of output will contain the cursor value:
journalctl -b -u network --show-cursor --since 15:00
Sep 08 15:37:59 localhost.localdomain network[4074]: [FAILED]
  Sep 08 15:37:59 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
Sep 08 15:37:59 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
Sep 08 15:37:59 localhost.localdomain systemd[1]: Unit network.service entered failed state.
-- cursor: s=13497722134642a2ac1544bada0c8836;i=1120d;b=8491c05dabd3444ca122e7069b5de0a9;m=db2118a46;t=4e5e7d81c7402;x=d177768ac95df831
 
The cursor can be used to identify that point in the journal in a broader query to provide context:
journalctl -c "s=13497722134642a2ac1544bada0c8836;i=1120d;b=8491c05dabd3444ca122e7069b5de0a9;m=db2118a46;t=4e5e7d81c7402;x=d177768ac95df831"
 
Scripts parsing journalctl's output can store the cursor value and use it on their next run to pick up where they left off:
journalctl --after-cursor "s=13497722134642a2ac1544bada0c8836;i=1120d;b=8491c05dabd3444ca122e7069b5de0a9;m=db2118a46;t=4e5e7d81c7402;x=d177768ac95df831"


Detailed information on the storaged project is available from the upstream site at https://storaged.org .




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[[Category:Draft documentation]]
[[Category:Draft documentation]]
[[Category:Documentation beats]]
[[Category:Documentation beats]]
<!-- There's a bit about journalctl cursor seeking, but I can't find a documented definition of 'cursor' or any usage examples. It appears to be for machine users of the journal only. -->

Latest revision as of 01:32, 20 September 2016

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Work on beats has now moved to git at https://pagure.io/fedora-docs/release-notes. If you have changes or additions, please contact the docs team via #fedora-docs, docs@lists.fedoraproject.org, or with the release-notes BZ component.


storaged replaces udisks2

The udisks2 package provides dynamic storage management functionality to legacy Fedora systems. Most prominently, desktop environments like GNOME udisks to handle removable media, such as USB thumb drives, via a dbus interface.

Because udisks2 does not support more complex storage technologies such as LVM or iSCSI, it is being replaced in Fedora 25 by storaged, an enhanced fork of the udisks project. storaged is a drop-in replacement for udisks2, and the additional functionality allows administrators to use software like Cockpit in Fedora Server to manage these advanced storage resources.

Detailed information on the storaged project is available from the upstream site at https://storaged.org .

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