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How to upgrade CoreOS manually

Before upgrading, make sure you are allowing insecure registry access, or your newer docker won't be able to talk to the Deis registry:

sudo bash -c 'mkdir -p /etc/systemd/system/docker.service.d/; cat <<EOF > /etc/systemd/system/docker.service.d/50-insecure-registry.conf
[Service]
Environment="DOCKER_OPTS=--insecure-registry 10.0.0.0/8 --insecure-registry 172.16.0.0/12 --insecure-registry 192.168.0.0/16"
EOF
'

To kick off the upgrade:

sudo bash -ec 'uname -a && cat /etc/lsb-release && \
echo GROUP=stable > /etc/coreos/update.conf && \
systemctl unmask update-engine.service && \
systemctl start update-engine.service && \
update_engine_client -update && \
reboot'

After the reboot, wait a few minutes until you see that the grub boot flags have been updated:

journalctl -u update-engine.service | grep "boot flags"

After grub has been updated, stop the update-engine service and re-mask it:

sudo bash -ec 'systemctl stop update-engine.service && \
systemctl mask update-engine.service'

More information is available in Deis issue #3155 and CoreOS issue #262

@jobinar

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jobinar commented Aug 4, 2016

How is this better than just doing a update_engine_client -update?

@FranklinYu

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FranklinYu commented Aug 14, 2016

+1 to @jobinar

@KenanSulayman

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KenanSulayman commented Jun 1, 2017

@jobinar well, at least it allows you to change the update channel of coreOS in one shot

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