Move Ubuntu specific use_tempaddr setting to ubuntu-common element
By default (during boot) the use_tempaddr is set to <=0 for all up-to date kernels. Only Ubuntu installes a sysctl setting which sets the use_tempaddr to 2 (/etc/sysctl.d/10-ipv6-privacy.conf) [1]. The 80-disable-rfc3041 overwrites this setting and sets use_tempaddr back to 0. Because this only affects Ubuntu it makes sense to move the script to the ubuntu-common element. The other motivation for the move is, to clear the base element that it can be removed. [1] https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1068756 Change-Id: Ibf261818ca8243874fde9eb3650bb65188fa228d Signed-off-by: Andreas Florath <andreas@florath.net>
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elements/ubuntu-common/README.rst
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elements/ubuntu-common/README.rst
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ubuntu-common
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=============
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This element holds configuration and scripts that are common for all
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Ubuntu images.
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@ -21,7 +21,17 @@ if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
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fi
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fi
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set -e
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set -e
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# This will disable the disable Privacy extensions for IPv6 (RFC3041)
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# This will disable the privacy extensions for IPv6 (RFC4941)
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# (RFC4941 obsoletes RFC3041)
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#
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# Note that depending on the implementation of how the sysctl
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# settings are applied there is a race condition: there might be
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# a small time-frame where the original Ubuntu settings from
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# /etc/sysctl.d/10-ipv6-privacy.conf are already applied but the
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# new settings from /etc/sysctl.d/99-cloudimg-ipv6.conf
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# not yet.
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# If during this time all started network interfaces will
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# use the privacy extension.
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cat > /etc/sysctl.d/99-cloudimg-ipv6.conf <<EOF
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cat > /etc/sysctl.d/99-cloudimg-ipv6.conf <<EOF
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# See https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1068756
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# See https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1068756
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net.ipv6.conf.all.use_tempaddr=0
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net.ipv6.conf.all.use_tempaddr=0
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@ -1,3 +1,4 @@
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cache-url
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cache-url
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dib-run-parts
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dib-run-parts
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dpkg
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dpkg
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ubuntu-common
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@ -1,2 +1,3 @@
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debootstrap
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debootstrap
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package-installs
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package-installs
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ubuntu-common
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@ -3,3 +3,4 @@ cloud-init-datasources
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dib-run-parts
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dib-run-parts
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dkms
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dkms
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dpkg
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dpkg
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ubuntu-common
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