[Buildroot] [git commit branch/next] package/{chrony, ntp, openntpd}: turn off DNSSEC validation
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Tue Aug 3 21:16:18 UTC 2021
commit: https://git.buildroot.net/buildroot/commit/?id=c2db53caca63ea8fca17823e37d496774aefd477
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/next
We have a chicken and egg problem: validation of DNSSEC signatures
doesn't work without a correct clock, but to set the correct clock we
need to contact NTP servers which requires resolving a hostname, which
would normally require DNSSEC validation.
Let's break the cycle by excluding NTP hostname resolution from
validation for now.
Details:
https://github.com/systemd/systemd/commit/abf4e5c1d3ad767bc0ed67883e8e4d916af095ec
Signed-off-by: James Hilliard <james.hilliard1 at gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
package/chrony/chrony.service | 4 ++++
package/ntp/ntpd.service | 4 ++++
package/openntpd/ntpd.service | 4 ++++
3 files changed, 12 insertions(+)
diff --git a/package/chrony/chrony.service b/package/chrony/chrony.service
index 325b63c492..210122cf5d 100644
--- a/package/chrony/chrony.service
+++ b/package/chrony/chrony.service
@@ -4,6 +4,10 @@ After=syslog.target network.target
Conflicts=systemd-timesyncd.service
[Service]
+# Turn off DNSSEC validation for hostname look-ups, since those need the
+# correct time to work, but we likely won't acquire that without NTP. Let's
+# break this chicken-and-egg cycle here.
+Environment=SYSTEMD_NSS_RESOLVE_VALIDATE=0
ExecStart=/usr/sbin/chronyd -n
Restart=always
diff --git a/package/ntp/ntpd.service b/package/ntp/ntpd.service
index 7964c5389b..9a0f4c6dbf 100644
--- a/package/ntp/ntpd.service
+++ b/package/ntp/ntpd.service
@@ -5,6 +5,10 @@ After=network.target
[Service]
Type=forking
PIDFile=/run/ntpd.pid
+# Turn off DNSSEC validation for hostname look-ups, since those need the
+# correct time to work, but we likely won't acquire that without NTP. Let's
+# break this chicken-and-egg cycle here.
+Environment=SYSTEMD_NSS_RESOLVE_VALIDATE=0
ExecStart=/usr/sbin/ntpd -g -p /run/ntpd.pid
[Install]
diff --git a/package/openntpd/ntpd.service b/package/openntpd/ntpd.service
index a4ffa7318c..c2924b0c5c 100644
--- a/package/openntpd/ntpd.service
+++ b/package/openntpd/ntpd.service
@@ -5,6 +5,10 @@ Conflicts=systemd-timesyncd.service
[Service]
Type=simple
+# Turn off DNSSEC validation for hostname look-ups, since those need the
+# correct time to work, but we likely won't acquire that without NTP. Let's
+# break this chicken-and-egg cycle here.
+Environment=SYSTEMD_NSS_RESOLVE_VALIDATE=0
ExecStart=/usr/sbin/ntpd -s -d
[Install]
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