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Bug 1477757 - [RFE] allow cryptsetup block device units to appear after networking comes up
Summary: [RFE] allow cryptsetup block device units to appear after networking comes up
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: systemd
Version: 7.5
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: systemd-maint
QA Contact: Frantisek Sumsal
Depends On:
Blocks: 1475406
TreeView+ depends on / blocked
Reported: 2017-08-02 20:33 UTC by Nathaniel McCallum
Modified: 2018-06-15 13:00 UTC (History)
10 users (show)

Fixed In Version: systemd-219-47.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2018-04-10 11:21:21 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1384014 0 unspecified CLOSED RFE: Possibility to boot from encrypted non-iSCSI disks and mount encrypted iSCSI disks on the same machine 2021-06-10 11:35:20 UTC
Red Hat Product Errata RHBA-2018:0711 0 None None None 2018-04-10 11:22:27 UTC

Internal Links: 1384014

Description Nathaniel McCallum 2017-08-02 20:33:08 UTC
Currently, systemd generates cryptsetup unit files directly from /etc/crypttab. Due to dependencies, these unit files are always started before networking comes up.

In some cases, clevis can answer the systemd-ask-password prompts for these block devices automatically. But in most of those cases, network access is required. In attempting to properly order this setup, a circular dependency arises.

We have a few options.

First, we could try to auto-detect the clevis policy dependencies from the disk. This is doable via udev. The problem is that units are generated from /etc/crypttab whether the disks or present or not. This creates a race-condition when devices aren't connected to the system before the generation of unit files. This solution would be more comprehensive, but would also be more work.

Second, we could implement a _netdev like option in /etc/crypttab. This would be less featureful and less dynamic, but would also help iSCSI people. For an existing RFE, see: https://github.com/systemd/systemd/issues/4642

Comment 1 Nathaniel McCallum 2017-08-02 20:34:41 UTC
This is also related: https://github.com/systemd/systemd/issues/5182

Comment 13 Lukáš Nykrýn 2017-09-26 07:47:13 UTC
fix merged to upstream staging branch -> https://github.com/lnykryn/systemd-rhel/pull/141 -> post

Comment 16 Nathaniel McCallum 2017-10-12 21:00:54 UTC
This is apparently an incomplete fix. See this for more detail:


Comment 18 Lukáš Nykrýn 2017-10-31 09:30:12 UTC
fix merged to staging branch -> https://github.com/lnykryn/systemd-rhel/pull/166 -> post

Comment 20 Lukáš Nykrýn 2017-11-01 14:24:35 UTC
fix merged to staging branch -> https://github.com/lnykryn/systemd-rhel/pull/167 -> post

Comment 25 errata-xmlrpc 2018-04-10 11:21:21 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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