The Stable channel is intended for use in production clusters. Versions of Flatcar Container Linux have been tested as they move through Alpha and Beta channels before being promoted to stable.
The Beta channel is where Flatcar Container Linux stability is solidified. We encourage including some beta machines in production clusters in order to catch any issues that may arise with your setup.
The Alpha channel follows a more frequent release cadence and is where new updates are introduced. Users can try the new versions of the Linux kernel, systemd and other core packages.
Release Date: Jan 12, 2021
docker 19.03.14 ignition 0.34.0 kernel 5.4.87 systemd 246Security fixes
Bug fixes
Updates
Release Date: Dec 16, 2020
docker 19.03.14 ignition 0.34.0 kernel 5.4.83 systemd 246Security fixes:
Bug fixes:
net.ipv4.conf.*.rp_filter
is set to 0
for the Cilium CNI plugin to work (Flatcar#181)Changes:
Updates:
Release Date: Dec 7, 2020
docker 19.03.14 ignition 0.34.0 kernel 5.4.81 systemd 246Security fixes:
Bug fixes
Changes:
Updates:
Release Date: Nov 19, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.77 systemd 245Security fixes:
Bug fixes:
Updates:
Release Date: Oct 28, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.72 systemd 245Security fixes:
Bug fixes:
/etc/coreos
to /etc/flatcar
symlink always exists, relevant for the Container Linux Config transpiler (ct) when specifying directives for update:
or locksmith:
while also reformatting the rootfs (baselayout PR#7)Updates:
Release Date: Sep 30, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.67 systemd 245Bug fixes:
/etc/portage/savedconfig/
folder that contained a dump of the firmware config flatcar-linux/coreos-overlay#613Changes:
Updates:
Release Date: Sep 22, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.66 systemd 1.30.0 245Security fixes:
Updates:
Release Date: Sep 16, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.145 systemd 1.30.0 241Release Date: Sep 7, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.143 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Aug 20, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.140 systemd 1.30.0 241Security fixes:
Bug fixes:
ip=<ip>::<gateway>:<netmask>:<hostname>:<iface>:none[:<dns1>[:<dns2>]]
(flatcar-linux/bootengine#15)Changes:
Updates:
Release Date: Jun 17, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.128 systemd 1.30.0 241Security fixes:
Changes:
/usr/share/licenses/INFO
Updates:
Release Date: May 26, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.124 systemd 1.30.0 241Security fixes:
Bug fixes:
/boot/coreos
only if /boot/coreos/vmlinux-*
exists (https://github.com/flatcar-linux/update_engine/pull/5)BINHOST
URLs in the development container to download binary packagesChanges:
/boot/coreos/first_boot
flag file (https://github.com/flatcar-linux/bootengine/pull/13)etcd-member.service
, flanneld.service
, and kubelet-wrapper
flatcar.autologin
kernel command line parameter on Azure and VMware for auto login on the serial consoleconntrack
(conntrack-tools)journalctl
output, pstore
kernel crash logs, and coredumpctl list
output in the mayday
reportcoreos.config.*
and flatcar.config.*
guestinfo variables on VMware OEMUpdates:
Release Date: Mar 31, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.107 systemd 1.30.0 241Bug fixes:
Changes:
tracepath
alongside traceroute6
(https://github.com/flatcar-linux/Flatcar/issues/50)Updates:
Release Date: Mar 2, 2020
docker 18.06.3 ignition 0.33.0 kernel 4.19.106 systemd 1.30.0 241Bug fixes:
coreos.oem.*
, coreos.autologin
, coreos.first_boot
, and the QEMU firmware config path opt/com.coreos/config
(https://github.com/flatcar-linux/Flatcar/issues/16 https://github.com/flatcar-linux/afterburn/pull/7 https://github.com/flatcar-linux/bootengine/pull/7 https://github.com/flatcar-linux/bootengine/pull/8 https://github.com/flatcar-linux/init/pull/16 https://github.com/flatcar-linux/init/pull/17 https://github.com/flatcar-linux/ignition/pull/8)Security fixes:
Updates:
Release Date: Feb 10, 2020
docker 18.06.3 ignition 0.33.0 kernel 4.19.95 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Dec 18, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.86 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Dec 5, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.86 systemd 1.30.0 241Release Date: Nov 21, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.84 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Nov 11, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.78 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Oct 17, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.78 systemd 1.30.0 241No changes for stable promotion
Release Date: Sep 5, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.68 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Aug 30, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.66 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Aug 16, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.65 systemd 1.30.0 241Security fixes:
Updates:
Bug fixes:
Changes:
Release Date: Aug 1, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.56 systemd 1.30.0 241Release Date: Jul 3, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.50 systemd 1.30.0 241Bug fixes:
guestinfo.(coreos|ignition).config
parameters are specified on VMware (coreos/ignition#821)Updates:
Release Date: Jul 1, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.50 systemd 1.30.0 241No changes for stable promotion
Release Date: Jun 19, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.43 systemd 1.30.0 241Security fixes:
Bug fixes:
Release Date: Jun 6, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.43 systemd 1.30.0 241Bug fixes:
MountFlags=shared
option (#2579)Changes:
Release Date: May 16, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.43 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Apr 26, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.34 systemd 1.30.0 241Bug fixes:
Release Date: Apr 25, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.34 systemd 1.30.0 241Release Date: Apr 24, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.34 systemd 1.30.0 241No changes for stable promotion
Release Date: Mar 12, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.25 systemd 1.30.0 238Security fixes:
Bug fixes:
Updates:
Release Date: Feb 27, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.23 systemd 1.30.0 238Security fixes:
sockfs_setattr
(CVE-2019-8912)Release Date: Feb 21, 2019
docker 18.06.1 ignition 0.28.0 kernel 4.14.96 systemd 1.30.0 238Release Date: Feb 14, 2019
docker 18.06.1 ignition 0.28.0 kernel 4.14.96 systemd 1.30.0 238Release Date: Jan 30, 2019
docker 18.06.1 ignition 0.28.0 kernel 4.14.96 systemd 1.30.0 238Release Date: Jan 28, 2019
docker 18.06.1 ignition 0.28.0 kernel 4.14.88 systemd 1.30.0 238No changes for stable promotion
Release Date: Jan 28, 2019
docker 18.06.1 ignition 0.28.0 kernel 4.14.88 systemd 1.30.0 238No changes for stable promotion
Changes:
Release Date: Dec 21, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.84 systemd 1.30.0 238Security fixes:
INT_MAX
(CVE-2018-19788)Updates:
Release Date: Nov 27, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.81 systemd 1.30.0 238Security fixes:
Updates:
Release Date: Nov 8, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.78 systemd 1.30.0 238Security fixes:
Release Date: Oct 26, 2018
docker 18.06.1 ignition 0.26.0 kernel 4.14.74 systemd 1.30.0 238Security fixes:
Updates:
Release Date: Oct 11, 2018
docker 18.06.1 ignition 0.26.0 kernel 4.14.67 systemd 1.30.0 238Release Date: Sep 14, 2018
docker 18.06.1 ignition 0.26.0 kernel 4.14.67 systemd 1.30.0 238Release Date: Aug 17, 2018
docker 18.03.1 ignition 0.25.1 kernel 4.14.63 systemd 1.30.0 238Security fixes:
Updates:
Release Date: Aug 8, 2018
docker 18.03.1 ignition 0.25.1 kernel 4.14.59 systemd 1.30.0 238Security fixes:
Bug fixes:
Release Date: Jul 31, 2018
docker 18.03.1 ignition 0.25.1 kernel 4.14.59 systemd 1.30.0 238Release Date: Jul 26, 2018
docker 18.03.1 ignition 0.25.1 kernel 4.14.55 systemd 1.30.0 238No changes for stable promotion
Release Date: Jun 15, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.48 systemd 1.29.0 238Release Date: Jun 13, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.48 systemd 1.29.0 238Bug fixes:
Updates:
Release Date: Jun 1, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.44 systemd 1.29.0 238Security fixes:
Bug fixes:
Updates:
Release Date: May 27, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.42 systemd 1.29.0 238Bug fixes:
Release Date: May 26, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.42 systemd 1.29.0 238Release Date: Apr 25, 2018
docker 17.12.1 ignition 0.22.0 kernel 4.14.32 systemd 1.29.0 237Initial Flatcar release.
Bug fixes:
Notes:
Bug fixes:
Release Date: Jan 12, 2021
docker 19.03.14 ignition 0.34.0 kernel 5.9.16 systemd 246Security fixes
Bug fixes
net.ipv4.conf.*.rp_filter
is set to 0
for the Cilium CNI plugin to work (kinvolk/Flatcar#181)Changes
Updates
Release Date: Dec 1, 2020
docker 19.03.13 ignition 0.34.0 kernel 5.9.11 systemd 246Security fixes:
Bug fixes:
Changes:
Updates:
Release Date: Nov 19, 2020
docker 19.03.13 ignition 0.34.0 kernel 5.8.18 systemd 245Security fixes:
Bug fixes:
Updates:
Release Date: Oct 16, 2020
docker 19.03.13 ignition 0.34.0 kernel 5.8.14 systemd 245Security fixes:
Bug fixes:
/etc/coreos
to /etc/flatcar
symlink always exists, relevant for the Container Linux Config transpiler (ct) when specifying directives for update:
or locksmith:
while also reformatting the rootfs (baselayout PR#7)Updates:
Release Date: Sep 30, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.8.11 systemd 1.30.0 245Security fixes:
Bug fixes:
/etc/portage/savedconfig/
folder that contained a dump of the firmware config flatcar-linux/coreos-overlay#613Changes:
Updates:
Release Date: Sep 16, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.65 systemd 1.30.0 245Bug fixes:
Changes:
sysctl net.ipv4.conf.(all|*).rp_filter
to 0 (instead of the systemd upstream value 2) to be less restrictive which some network solutions rely on (PR#11)flatcar-install
allows installation to a multipath drive (PR#24)Updates:
Release Date: Sep 7, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.62 systemd 1.30.0 245Security fixes:
Updates:
Release Date: Sep 3, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.61 systemd 1.30.0 245Release Date: Aug 20, 2020
docker 19.03.11 ignition 0.34.0 kernel 5.4.59 systemd 1.30.0 243Security fixes:
Bug fixes:
Updates:
Release Date: Jul 23, 2020
docker 19.03.11 ignition 0.34.0 kernel 5.4.52 systemd 1.30.0 243Changes since the Alpha release 2513.1.0
Bug Fixes:
ip=<ip>::<gateway>:<netmask>:<hostname>:<iface>:none[:<dns1>[:<dns2>]]
https://github.com/flatcar-linux/bootengine/pull/15Updates:
Release Date: Jun 17, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.128 systemd 1.30.0 241Security fixes:
Changes:
/usr/share/licenses/INFO
Updates:
Release Date: May 26, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.124 systemd 1.30.0 241Security fixes:
Bug fixes:
/boot/coreos
only if /boot/coreos/vmlinux-*
exists (https://github.com/flatcar-linux/update_engine/pull/5)BINHOST
URLs in the development container to download binary packagesChanges:
/boot/coreos/first_boot
flag file (https://github.com/flatcar-linux/bootengine/pull/13)etcd-member.service
, flanneld.service
, and kubelet-wrapper
flatcar.autologin
kernel command line parameter on Azure and VMware for auto login on the serial consoleconntrack
(conntrack-tools)journalctl
output, pstore
kernel crash logs, and coredumpctl list
output in the mayday
reportcoreos.config.*
and flatcar.config.*
guestinfo variables on VMware OEMUpdates:
Release Date: Mar 31, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.112 systemd 1.30.0 241Bug fixes:
Changes:
tracepath
alongside traceroute6
(https://github.com/flatcar-linux/Flatcar/issues/50)Updates:
Release Date: Mar 2, 2020
docker 18.06.3 ignition 0.34.0 kernel 4.19.106 systemd 1.30.0 241Bug fixes:
coreos.oem.*
, coreos.autologin
, coreos.first_boot
, and the QEMU firmware config path opt/com.coreos/config
(https://github.com/flatcar-linux/Flatcar/issues/16 https://github.com/flatcar-linux/afterburn/pull/7 https://github.com/flatcar-linux/bootengine/pull/7 https://github.com/flatcar-linux/bootengine/pull/8 https://github.com/flatcar-linux/init/pull/16 https://github.com/flatcar-linux/init/pull/17 https://github.com/flatcar-linux/ignition/pull/8)Updates:
Release Date: Feb 10, 2020
docker 18.06.3 ignition 0.33.0 kernel 4.19.102 systemd 1.30.0 241Bug fixes:
Security fixes:
Changes:
qede
kernel moduleUpdates:
Release Date: Jan 17, 2020
docker 18.06.3 ignition 0.33.0 kernel 4.19.95 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Dec 18, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.87 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Dec 5, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.87 systemd 1.30.0 241Release Date: Nov 21, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.84 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Nov 11, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.81 systemd 1.30.0 241Release Date: Oct 17, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.79 systemd 1.30.0 241Release Date: Oct 16, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.78 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Sep 25, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.75 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Sep 13, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.71 systemd 1.30.0 241Release Date: Sep 5, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.69 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Aug 30, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.68 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Aug 16, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.65 systemd 1.30.0 241Security fixes:
Updates:
Bug fixes:
Release Date: Aug 8, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.65 systemd 1.30.0 241Security fixes:
Updates:
Changes:
Release Date: Aug 1, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.62 systemd 1.30.0 241Release Date: Jul 17, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.56 systemd 1.30.0 241No changes for beta promotion
Release Date: Jul 3, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.55 systemd 1.30.0 241Bug fixes:
guestinfo.(coreos|ignition).config
parameters are specified on VMware (coreos/ignition#821)Updates:
Release Date: Jul 1, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.55 systemd 1.30.0 241Release Date: Jun 19, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.50 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: May 21, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.44 systemd 1.30.0 241Release Date: May 16, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.43 systemd 1.30.0 241Security fixes:
Updates:
Release Date: May 8, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.36 systemd 1.30.0 241Bug fixes:
MountFlags=shared
option (#2579)Changes:
Release Date: Apr 24, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.36 systemd 1.30.0 241Bug fixes:
Changes:
atlantic
kernel module (#2576)Updates:
Release Date: Apr 17, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.34 systemd 1.30.0 241Bug fixes:
Changes:
atlantic
kernel module (#2576)Updates:
Release Date: Mar 26, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.31 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Mar 12, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.28 systemd 1.30.0 238Bug fixes:
Updates:
Release Date: Feb 27, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.25 systemd 1.30.0 238Security fixes:
sockfs_setattr
(CVE-2019-8912)Updates:
Release Date: Feb 21, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.23 systemd 1.30.0 238Release Date: Feb 14, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.20 systemd 1.30.0 238Security fixes:
Changes:
/sys/bus/rbd/add
to Linux 4.14 behavior (#2544)Updates:
Release Date: Jan 30, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.18 systemd 1.30.0 238Security fixes:
Updates:
Release Date: Jan 18, 2019
docker 18.06.1 ignition 0.29.1 kernel 4.19.13 systemd 1.30.0 238Release Date: Dec 21, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.88 systemd 1.30.0 238Security fixes:
INT_MAX
(CVE-2018-19788)Updates:
Release Date: Dec 6, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.84 systemd 1.30.0 238Changes:
Release Date: Nov 21, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.81 systemd 1.30.0 238Security fixes:
Updates:
Release Date: Nov 8, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.79 systemd 1.30.0 238Security fixes:
Changes:
Release Date: Oct 26, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.78 systemd 1.30.0 238Security fixes:
Bug fixes:
Updates:
Release Date: Oct 11, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.74 systemd 1.30.0 238Changes:
flatcar-install
(flatcar-linux/init#4)Bug fixes:
/usr/lib/coreos
symlink for Container Linux compatibility (flatcar-linux/coreos-overlay#8)Changes:
Release Date: Sep 14, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.14.69 systemd 1.30.0 238Bug fixes:
Changes:
Updates:
Release Date: Sep 5, 2018
docker 18.06.1 ignition 0.26.0 kernel 4.14.67 systemd 1.30.0 238Changes:
Updates:
Release Date: Aug 17, 2018
docker 18.06.0 ignition 0.26.0 kernel 4.14.63 systemd 1.30.0 238Security fixes:
Bug fixes:
Changes:
Release Date: Aug 8, 2018
docker 18.03.1 ignition 0.26.0 kernel 4.14.60 systemd 1.30.0 238Security fixes:
Bug fixes:
Updates:
Release Date: Jul 31, 2018
docker 18.03.1 ignition 0.26.0 kernel 4.14.59 systemd 1.30.0 238Release Date: Jul 26, 2018
docker 18.03.1 ignition 0.26.0 kernel 4.14.57 systemd 1.30.0 238Changes:
Release Date: Jul 13, 2018
docker 18.03.1 ignition 0.25.1 kernel 4.14.55 systemd 1.30.0 238Release Date: Jun 22, 2018
docker 18.03.1 ignition 0.25.1 kernel 4.14.50 systemd 1.30.0 238Changes:
Release Date: Jun 15, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.49 systemd 1.30.0 238Bug fixes:
Updates:
Release Date: Jun 13, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.48 systemd 1.30.0 238Bug fixes:
Updates:
Release Date: Jun 1, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.47 systemd 1.30.0 238Security fixes:
Bug fixes:
Updates:
Release Date: May 26, 2018
docker 18.03.1 ignition 0.24.1 kernel 4.14.42 systemd 1.30.0 238Changes:
Updates:
Release Date: May 11, 2018
docker 18.03.1 ignition 0.24.0 kernel 4.14.39 systemd 1.29.0 238Security fixes:
Updates:
Release Date: Apr 26, 2018
docker 18.03.0 ignition 0.24.0 kernel 4.14.35 systemd 1.29.0 238Bug fixes:
Changes:
Release Date: Apr 25, 2018
docker 17.12.1 ignition 0.23.0 kernel 4.14.30 systemd 1.29.0 237Initial Flatcar release.
Bug fixes:
Notes:
Bug fixes:
Release Date: Jan 12, 2021
docker 19.03.14 ignition 0.34.0 kernel 5.10.4 systemd 246Security fixes
Bug fixes
Changes
Updates
Note: Please note that ARM images remain experimental for now.
Release Date: Dec 18, 2020
docker 19.03.14 ignition 0.34.0 kernel 5.9.14 systemd 246Security fixes
Bug fixes
Changes
vimdiff
should not be created, if the USE flag minimal
is enabled. (Flatcar/#221)Updates
Note: Please note that ARM images remain experimental for now.
Release Date: Nov 27, 2020
docker 19.03.13 ignition 0.34.0 kernel 5.9.11 systemd 246Security fixes
Bug fixes
Changes
Updates
Note: Please note that ARM images remain experimental for now.
Release Date: Nov 20, 2020
docker 19.03.13 ignition 0.34.0 kernel 5.9.8 systemd 246Security fixes:
Bug fixes:
Changes:
Updates:
Release Date: Oct 28, 2020
docker 19.03.13 ignition 0.34.0 kernel 5.8.16 systemd 246Security fixes:
Bug fixes:
/etc/coreos
to /etc/flatcar
symlink always exists, relevant for the Container Linux Config transpiler (ct) when specifying directives for update:
or locksmith:
while also reformatting the rootfs (baselayout PR#7)Changes:
Updates:
Note: Please note that ARM images remain experimental for now.
Release Date: Oct 16, 2020
docker 19.03.13 ignition 0.34.0 kernel 5.8.14 systemd 246Security fixes:
Bug fixes:
/etc/coreos
to /etc/flatcar
symlink always exists, relevant for the Container Linux Config transpiler (ct) when specifying directives for update:
or locksmith:
while also reformatting the rootfs (baselayout PR#7)Changes:
network-online.target
and only require the bond interface itself to have at least one active link instead of routable
which requires both links to be active (afterburn PR#10)Updates:
Release Date: Sep 30, 2020
docker 19.03.13 ignition 0.34.0 kernel 5.8.11 systemd 245Security fixes:
Bug fixes:
/etc/portage/savedconfig/
folder that contained a dump of the firmware config flatcar-linux/coreos-overlay#613Changes:
Updates:
Note: Please note that ARM images remain experimental for now.
Release Date: Sep 16, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.8.9 systemd 1.30.0 245Bug fixes:
Changes:
sysctl net.ipv4.conf.(all|*).rp_filter
to 0 (instead of the systemd upstream value 2) to be less restrictive which some network solutions rely on (PR#11)flatcar-install
allows installation to a multipath drive (PR#24)lockdown
kernel command line parameter (PR#533)Updates:
Note: Please note that ARM images remain experimental for now.
Release Date: Sep 1, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.61 systemd 1.30.0 245Bug fixes:
render
group Flatcar#169Changes:
/sys/fs/bpf
into the toolbox container and allow BPF syscalls (PR#544)tc
Flatcar#172Updates:
Note: Please note that ARM images remain experimental for now.
Release Date: Aug 20, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.59 systemd 1.30.0 245Security fixes:
Bug fixes:
Changes:
Updates:
Release Date: Aug 6, 2020
docker 19.03.12 ignition 0.34.0 kernel 5.4.55 systemd 1.30.0 245Bug Fixes:
ip=<ip>::<gateway>:<netmask>:<hostname>:<iface>:none[:<dns1>[:<dns2>]]
(flatcar-linux/bootengine#15)Changes:
[Match]
section. Add a Name=*
entry to match all interfaces./sys/kernel/kheaders.tar.xz
Updates:
Note: Please note that ARM images remain experimental for now.
Release Date: Jun 30, 2020
docker 19.03.11 ignition 0.34.0 kernel 5.4.47 systemd 1.30.0 243Security Fixes:
Bugfixes:
Updates:
Note: Please note that ARM images remain experimental for now.
Release Date: Jun 17, 2020
docker 19.03.8 ignition 0.34.0 kernel 5.4.46 systemd 1.30.0 243Security fixes:
Changes:
/usr/share/licenses/INFO
Updates:
Release Date: May 26, 2020
docker 19.03.8 ignition 0.34.0 kernel 5.4.41 systemd 1.30.0 243Security fixes:
Bug fixes:
/boot/coreos
only if /boot/coreos/vmlinux-*
exists (https://github.com/flatcar-linux/update_engine/pull/5)Changes:
/boot/coreos/first_boot
flag file (https://github.com/flatcar-linux/bootengine/pull/13)etcd-member.service
, flanneld.service
, and kubelet-wrapper
wg
(wireguard-tools)jq
flatcar.autologin
kernel command line parameter on Azure for auto login on the serial consoleUpdates:
Release Date: Apr 30, 2020
docker 19.03.8 ignition 0.34.0 kernel 5.4.35 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Apr 15, 2020
docker 19.03.8 ignition 0.34.0 kernel 4.19.113 systemd 1.30.0 241Bug fixes:
Changes:
tracepath
alongside traceroute6
(https://github.com/flatcar-linux/Flatcar/issues/50)Updates:
Release Date: Mar 5, 2020
docker 19.03.5 ignition 0.34.0 kernel 4.19.106 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Feb 17, 2020
docker 19.03.5 ignition 0.34.0 kernel 4.19.102 systemd 1.30.0 241Security fixes:
Bug fixes:
Changes:
Updates:
Release Date: Jan 21, 2020
docker 19.03.5 ignition 0.34.0 kernel 4.19.97 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Dec 20, 2019
docker 19.03.5 ignition 0.33.0 kernel 4.19.89 systemd 1.30.0 241Security fixes:
/dev/kvm
(CVE-2019-19332)Bug fixes:
Updates:
Release Date: Dec 9, 2019
docker 19.03.5 ignition 0.33.0 kernel 4.19.87 systemd 1.30.0 241It is the first release done for both amd64 and arm64.
Bug fixes:
Updates:
Release Date: Dec 5, 2019
docker 19.03.5 ignition 0.33.0 kernel 4.19.87 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Nov 25, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.84 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Nov 11, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.81 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Oct 23, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.80 systemd 1.30.0 241Release Date: Oct 17, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.79 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Oct 16, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.78 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Sep 25, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.75 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Sep 13, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.71 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Sep 5, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.69 systemd 1.30.0 241Security fixes:
Bug fixes:
Updates:
Release Date: Aug 30, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.68 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Aug 16, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.65 systemd 1.30.0 241Security fixes:
Updates:
Bug fixes:
Release Date: Aug 8, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.65 systemd 1.30.0 241Security fixes:
Updates:
Changes:
Release Date: Aug 1, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.62 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Jul 17, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.58 systemd 1.30.0 241Bug fixes:
device or resource busy
error when creating overlay mounts, introduced in 2191.0.0Updates:
Release Date: Jul 3, 2019
docker 18.06.3 ignition 0.33.0 kernel 4.19.56 systemd 1.30.0 241Security fixes:
Bug fixes:
guestinfo.(coreos|ignition).config
parameters are specified on VMware (coreos/ignition#821)Updates:
Release Date: Jul 1, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.55 systemd 1.30.0 241Bug fixes:
Updates:
Release Date: Jun 19, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.50 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Jun 12, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.47 systemd 1.30.0 241Bug fixes:
Release Date: Jun 6, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.47 systemd 1.30.0 241Security fixes:
Updates:
Release Date: May 16, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.43 systemd 1.30.0 241Security fixes:
Updates:
Release Date: May 8, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.37 systemd 1.30.0 241Security fixes:
Bug fixes:
MountFlags=shared
option (#2579)Changes:
Updates:
Release Date: May 3, 2019
docker 18.06.3 ignition 0.32.0 kernel 4.19.36 systemd 1.30.0 241Security fixes:
Bug fixes:
Changes:
atlantic
kernel module (#2576)Updates:
Release Date: Apr 9, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.34 systemd 1.30.0 241Security fixes:
Updates:
Release Date: Mar 26, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.31 systemd 1.30.0 241Security fixes:
scp
allowing remote servers to change target directory permissions (CVE-2018-20685)scp
allowing remote servers to overwrite arbitrary files (CVE-2019-6111)ntpd
denial of service by authenticated user (CVE-2019-8936)ntpq
and ntpdc
(CVE-2018-12327)Bug fixes:
Updates:
Release Date: Mar 12, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.28 systemd 1.30.0 241Security fixes:
--sparse
option (CVE-2018-20482)Bug fixes:
Changes:
vhost_vsock
kernel module (#2563)Updates:
Release Date: Feb 27, 2019
docker 18.06.3 ignition 0.31.0 kernel 4.19.25 systemd 1.30.0 238Security fixes:
sockfs_setattr
(CVE-2019-8912)Updates:
Release Date: Feb 14, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.20 systemd 1.30.0 238Security fixes:
Changes:
/sys/bus/rbd/add
to Linux 4.14 behavior (#2544)Updates:
Release Date: Jan 30, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.18 systemd 1.30.0 238Release Date: Jan 18, 2019
docker 18.06.1 ignition 0.30.0 kernel 4.19.15 systemd 1.30.0 238Security fixes:
Changes:
ip_vs_mh
kernel module (#2542)Updates:
Release Date: Dec 21, 2018
docker 18.06.1 ignition 0.29.1 kernel 4.19.9 systemd 1.30.0 238Security fixes:
INT_MAX
(CVE-2018-19788)Bug fixes:
Updates:
Release Date: Dec 6, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.19.6 systemd 1.30.0 238Release Date: Nov 21, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.19.2 systemd 1.30.0 238Security fixes:
Updates:
Release Date: Nov 8, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.19.1 systemd 1.30.0 238Security fixes:
Bug fixes:
nf_conntrack_ipv4
kernel module to fix kube-proxy IPVS on Linux 4.19 (#2518)Updates:
Release Date: Oct 26, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.19.0 systemd 1.30.0 238Security fixes:
Bug fixes:
Updates:
Release Date: Oct 11, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.18.12 systemd 1.30.0 238Changes:
flatcar-install
(flatcar-linux/init#4)Bug fixes:
/usr/lib/coreos
symlink for Container Linux compatibility (flatcar-linux/coreos-overlay#8)Updates:
Release Date: Oct 1, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.18.9 systemd 1.30.0 238Bug fixes:
Updates:
Release Date: Sep 14, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.18.7 systemd 1.30.0 238Bug fixes:
Changes:
Updates:
Release Date: Aug 29, 2018
docker 18.06.1 ignition 0.28.0 kernel 4.18.5 systemd 1.30.0 238Changes:
Updates:
Release Date: Aug 17, 2018
docker 18.06.0 ignition 0.27.0 kernel 4.17.15 systemd 1.30.0 238Security fixes:
Bug fixes:
Updates:
Release Date: Aug 8, 2018
docker 18.06.0 ignition 0.26.0 kernel 4.17.12 systemd 1.30.0 238Security fixes:
Bug fixes:
Updates:
Release Date: Jul 31, 2018
docker 18.06.0 ignition 0.26.0 kernel 4.17.11 systemd 1.30.0 238Release Date: Jul 26, 2018
docker 18.06.0 ignition 0.26.0 kernel 4.17.9 systemd 1.30.0 238Changes:
Updates:
Release Date: Jul 5, 2018
docker 18.05.0 ignition 0.26.0 kernel 4.17.3 systemd 1.30.0 238Security fixes:
Changes:
/dev/urandom
early in boot will block until entropy pool is fully initializedUpdates:
Release Date: Jun 22, 2018
docker 18.05.0 ignition 0.26.0 kernel 4.16.16 systemd 1.30.0 238Bug fixes:
Changes:
Updates:
Release Date: Jun 13, 2018
docker 18.05.0 ignition 0.25.1 kernel 4.16.14 systemd 1.30.0 238Release Date: Jun 12, 2018
docker 18.05.0 ignition 0.25.1 kernel 4.16.14 systemd 1.30.0 238Security fixes:
Bug fixes:
Changes:
Updates:
Release Date: Jun 1, 2018
docker 18.05.0 ignition 0.25.1 kernel 4.16.13 systemd 1.30.0 238Security fixes:
Bug fixes:
Updates:
Release Date: May 27, 2018
docker 18.05.0 ignition 0.25.1 kernel 4.16.10 systemd 1.30.0 238Bug fixes:
Release Date: May 26, 2018
docker 18.05.0 ignition 0.25.1 kernel 4.16.10 systemd 1.30.0 238Security fixes:
Changes:
notrap
to ntpd default access restrictions (#2220)coreos-install -i
no longer modifies grub.cfg
(#2291)Updates:
Release Date: May 11, 2018
docker 18.04.0 ignition 0.24.0 kernel 4.16.7 systemd 1.30.0 238Bug fixes:
Changes:
Updates:
Release Date: Apr 26, 2018
docker 18.04.0 ignition 0.24.0 kernel 4.16.3 systemd 1.30.0 238Security fixes:
Bug fixes:
/etc/machine-id
from the host to the kubelet/boot
from FAT16 to FAT32 (#2246)Changes:
Updates:
Release Date: Apr 25, 2018
docker 18.03.0 ignition 0.24.0 kernel 4.15.15 systemd 1.29.0 238Initial Flatcar release.
Notes:
Security fixes:
glob()
with ~
(CVE-2017-15670, CVE-2017-15671, CVE-2017-15804)$ORIGIN
on setuid binaries (CVE-2017-16997)realpath()
(CVE-2018-1000001)memalign()
(CVE-2018-6485)Bug fixes:
Updates:
Release Date: Dec 16, 2020
docker 19.03.14 ignition 0.34.0 kernel 5.4.83 systemd 246Changes:
Updates: