Clean Code

01-old/kubespray/docs/fcos.md

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+# Fedora CoreOS
+
+Tested with stable version 34.20210611.3.0
+
+Because package installation with `rpm-ostree` requires a reboot, playbook may fail while bootstrap.
+Restart playbook again.
+
+## Containers
+
+Tested with
+
+- containerd
+- crio
+
+## Network
+
+### calico
+
+To use calico create sysctl file with ignition:
+
+```yaml
+files:
+    - path: /etc/sysctl.d/reverse-path-filter.conf
+      contents:
+        inline: |
+          net.ipv4.conf.all.rp_filter=1
+```
+
+## libvirt setup
+
+### Prepare
+
+Prepare ignition and serve via http (a.e. python -m http.server )
+
+```json
+{
+  "ignition": {
+     "version": "3.0.0"
+  },
+
+  "passwd": {
+    "users": [
+      {
+        "name": "ansibleUser",
+        "sshAuthorizedKeys": [
+          "ssh-rsa ..publickey.."
+        ],
+        "groups": [ "wheel" ]
+      }
+    ]
+  }
+}
+```
+
+### create guest
+
+```ShellSeasion
+machine_name=myfcos1
+ignition_url=http://mywebserver/fcos.ign
+
+fcos_version=34.20210611.3.0
+kernel=https://builds.coreos.fedoraproject.org/prod/streams/stable/builds/${fcos_version}/x86_64/fedora-coreos-${fcos_version}-live-kernel-x86_64
+initrd=https://builds.coreos.fedoraproject.org/prod/streams/stable/builds/${fcos_version}/x86_64/fedora-coreos-${fcos_version}-live-initramfs.x86_64.img
+rootfs=https://builds.coreos.fedoraproject.org/prod/streams/stable/builds/${fcos_version}/x86_64/fedora-coreos-${fcos_version}-live-rootfs.x86_64.img
+kernel_args="console=ttyS0 coreos.live.rootfs_url=${rootfs} coreos.inst.install_dev=/dev/sda coreos.inst.stream=stable coreos.inst.ignition_url=${ignition_url}"
+sudo virt-install --name ${machine_name} --ram 4048 --graphics=none --vcpus 2 --disk size=20 \
+                --network bridge=virbr0 \
+                --install kernel=${kernel},initrd=${initrd},kernel_args_overwrite=yes,kernel_args="${kernel_args}"
+```