John3-16: Added Category: Virtualization

2025-12-06T04:20:38Z

Added Category: Virtualization

← Older revision		Revision as of 04:20, 6 December 2025
Line 120:		Line 120:
	cloud-init status --long		cloud-init status --long
	</pre>		</pre>

			[[Category:Virtualization]]

Thomas: /* Alpine Linux 🌲 K8s in 1 Minute with the nocloud cloud-init image */

2024-05-02T07:08:52Z

Alpine Linux 🌲 K8s in 1 Minute with the nocloud cloud-init image

← Older revision		Revision as of 07:08, 2 May 2024
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	= Alpine Linux <span class="emoji" data-emoji="~~evergreen_tree~~">🌲</span> K8s in 1 Minute with the nocloud cloud-init image =		= Alpine Linux <span class="emoji" data-emoji="sun_behind_rain_cloud">🌦️</span> K8s in 1 Minute with the nocloud cloud-init image =

			= '''This is a very early version and contains some hacks''' =

	== Summary ==		== Summary ==

Thomas: /* Alpine Linux 🌲 K8s in 1 Minute with the nocloud cloud-init image */

2024-05-02T07:01:19Z

Alpine Linux 🌲 K8s in 1 Minute with the nocloud cloud-init image

← Older revision		Revision as of 07:01, 2 May 2024
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	# for some reason in need to start the {{Path\|croup}} service otherwise {{Path\|containerd}} did not come up		# for some reason in need to start the {{Path\|croup}} service otherwise {{Path\|containerd}} did not come up

	The rest of the installations worked out of the box.		The rest of the installations worked out of the box. Full code available at [https://github.com/thomasfricke/k8s-alpine-cloudinit github]

	You need two files {{Path\|metadata}} identifying the system		You need two files {{Path\|metadata}} identifying the system

Thomas: /* Alpine Linux 🌲 K8s in 1 Minute */

2024-05-02T06:57:47Z

Alpine Linux 🌲 K8s in 1 Minute

← Older revision		Revision as of 06:57, 2 May 2024
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	= Alpine Linux <span class="emoji" data-emoji="evergreen_tree">🌲</span> K8s in 1 Minute =		= Alpine Linux <span class="emoji" data-emoji="evergreen_tree">🌲</span> K8s in 1 Minute with the nocloud cloud-init image =

	== Summary ==		== Summary ==

Thomas at 06:57, 2 May 2024

2024-05-02T06:57:05Z

← Older revision		Revision as of 06:57, 2 May 2024
Line 116:		Line 116:
	cloud-init schema --system		cloud-init schema --system
	echo "cloud-init status"		echo "cloud-init status"
	cloud-init status --long}}		cloud-init status --long
	</pre>		</pre>

Thomas: Created page with "= Alpine Linux 🌲 K8s in 1 Minute = == Summary == This is an idea how to set up Alpine with cloud init. The current version has been tested with the [https://dl-cdn.alpinelinux.org/alpine/v3.19/releases/cloud/nocloud_alpine-3.19.1-x86_64-bios-tiny-r0.qcow2 nocloud Alpine 3.19 cloudinit] base image. It has been inspired by k8s and intended for the adminless set up of virtual and bare metal machines. At the m..."

2024-05-02T06:56:26Z

Created page with "= Alpine Linux <span class="emoji" data-emoji="evergreen_tree">🌲</span> K8s in 1 Minute = == Summary == This is an idea how to set up Alpine with cloud init. The current version has been tested with the [https://dl-cdn.alpinelinux.org/alpine/v3.19/releases/cloud/nocloud_alpine-3.19.1-x86_64-bios-tiny-r0.qcow2 nocloud Alpine 3.19 cloudinit] base image. It has been inspired by k8s and intended for the adminless set up of virtual and bare metal machines. At the m..."

New page

= Alpine Linux <span class="emoji" data-emoji="evergreen_tree">🌲</span> K8s in 1 Minute =

== Summary ==

This is an idea how to set up Alpine with cloud init. The current version has been tested with the [https://dl-cdn.alpinelinux.org/alpine/v3.19/releases/cloud/nocloud_alpine-3.19.1-x86_64-bios-tiny-r0.qcow2 nocloud Alpine 3.19 cloudinit] base image. It has been inspired by [[k8s]] and intended for the adminless set up of virtual and bare metal machines.
At the moment it is only a proof of concept and needs to be extended to a real multi server setup.

=== Necessary fixes to [[k8s]] ===

The {{Path|runcmd command}} fixes several issues with the image and the way how services are started.

# added another user {{Path|k8s}}
# added name and ip address to {{Path|/etc/hosts}}
# align the versions of the modules by a quick hack link in {{Path|/lib/modules}}
# some config patches using {{Path|sed}}
# for some reason in need to start the {{Path|croup}} service otherwise {{Path|containerd}} did not come up

The rest of the installations worked out of the box.

You need two files {{Path|metadata}} identifying the system

<pre>alpine
local-hostname: alpine
</pre>

and {{Path|user-data}} with the actual configuration.

<pre>
package_update: true
package_upgrade: true
package_reboot_if_required: true
#package_reboot: true

write_files:
- path: /etc/apk/repositories
content: |
#https://dl-cdn.alpinelinux.org/alpine/v3.19/testing
http://dl-cdn.alpinelinux.org/alpine/edge/community
http://dl-cdn.alpinelinux.org/alpine/edge/testing
append: true
- path: /etc/modules-load.d/k8s.conf
content: |
br_netfilter
- path: /etc/sysctl.conf
content: |
net.bridge.bridge-nf-call-iptables=1
net.ipv4.ip_forward=1
- path: /etc/crictl.yaml
content: |
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 2
pull-image-on-create: false

packages:
- cni-plugin-flannel
- cni-plugins
- flannel
- flannel-contrib-cni
- kubelet
- kubeadm
- kubectl
- containerd
- containerd-ctr
- k9s
- uuidgen
- openssh-server-pam

ssh_pwauth: true # sshd service will be configured to accept password authentication method
password: changeme # Set a password for alpine
chpasswd:
expire: false # Don't ask for password reset after the first log-in
ssh_authorized_keys:
- ssh-ed25519 your key you@example.com

users:
- default
- name: k8s
doas:
- permit nopass k8s as root
ssh_authorized_keys:
- ssh-ed25519 your key you@example.com

runcmd:
- |
# mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
uuidgen > /etc/machine-id
sed -i 's/^#UsePAM no/UsePAM yes/' /etc/ssh/sshd_config && /etc/init.d/sshd restart
echo $(ifconfig eth0 | grep 'inet addr:' | cut -d: -f2| cut -d' ' -f1) $(hostname) >> /etc/hosts
(cd /lib/modules && ln -s 6.6.28-0-virt 6.6.14-0-virt && depmod)
modprobe br_netfilter
sed -ie '/swap/ s/^/#/' /etc/fstab && swapoff -a
mount --make-rshared /
echo "#!/bin/sh" > /etc/local.d/sharedmetrics.start
echo "mount --make-rshared /" >> /etc/local.d/sharedmetrics.start
chmod +x /etc/local.d/sharedmetrics.start
rc-update add local default
rc-update add cgroups
rc-update add containerd
rc-update add kubelet
rc-update add ntpd
rc-service ntpd start
rc-service cgroups start
rc-service containerd start
echo 1 > /proc/sys/net/ipv4/ip_forward
kubeadm config images pull
kubeadm init --pod-network-cidr=10.244.0.0/16 --node-name=$(hostname) --apiserver-advertise-address $(hostname -i) --control-plane-endpoint=$(hostname -i) --upload-certs
mkdir ~/.kube
mkdir -p /root/.kube/ && ln -s /etc/kubernetes/admin.conf /root/.kube/config
export KUBECONFIG=/etc/kubernetes/admin.conf
while ! kubectl cluster-info ; do echo waiting for api server ; sleep 1; done
kubectl apply -f https://raw.githubusercontent.com/flannel-io/flannel/master/Documentation/kube-flannel.yml
kubectl taint nodes --all node-role.kubernetes.io/control-plane-
echo "cloud-init schema"
cloud-init schema --system
echo "cloud-init status"
cloud-init status --long}}
</pre>

K8s with cloud-init - Revision history

John3-16: Added Category: Virtualization

Thomas: /* Alpine Linux 🌲 K8s in 1 Minute with the nocloud cloud-init image */

Thomas: /* Alpine Linux 🌲 K8s in 1 Minute with the nocloud cloud-init image */

Thomas: /* Alpine Linux 🌲 K8s in 1 Minute */

Thomas at 06:57, 2 May 2024