Run Kubernetes as Proxmox container

kubernetes-as-proxmox-container.md

Add to your contaier config /etc/pve/lxc/XXX.conf:

lxc.apparmor.profile: unconfined
lxc.cgroup.devices.allow: a
lxc.cap.drop: 
lxc.mount.auto: proc:rw sys:rw

---

Last verisons of kubernetes requires also shared filesystem, so add

mount --make-rshared /

into your /etc/rc.local inside container

[init] Using Kubernetes version: v1.13.4
[preflight] Running pre-flight checks
[preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for container runtime: exec: "docker": executable file not found in $PATH
[preflight] The system verification failed. Printing the output from the verification:
KERNEL_VERSION: 4.15.18-10-pve
OS: Linux
CGROUPS_CPU: enabled
CGROUPS_CPUACCT: enabled
CGROUPS_CPUSET: enabled
CGROUPS_DEVICES: enabled
CGROUPS_FREEZER: enabled
CGROUPS_MEMORY: enabled
error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
[ERROR SystemVerification]: failed to parse kernel config: unable to load kernel module: "configs", output: "modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/4.15.18-10-pve/modules.dep.bin'\nmodprobe: FATAL: Module configs not found in directory /lib/modules/4.15.18-10-pve\n", err: exit status 1
[preflight] If you know what you are doing, you can make a check non-fatal with --ignore-preflight-errors=...

W0604 21:04:57.186291 190 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.18.3
[preflight] Running pre-flight checks
[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
[WARNING FileExisting-tc]: tc not found in system path
[preflight] The system verification failed. Printing the output from the verification:
KERNEL_VERSION: 5.4.41-1-pve
DOCKER_VERSION: 18.09.1
DOCKER_GRAPH_DRIVER: overlay2
OS: Linux
CGROUPS_CPU: enabled
CGROUPS_CPUACCT: enabled
CGROUPS_CPUSET: enabled
CGROUPS_DEVICES: enabled
CGROUPS_FREEZER: enabled
CGROUPS_MEMORY: enabled
error execution phase preflight: [preflight] Some fatal errors occurred:
[ERROR SystemVerification]: failed to parse kernel config: unable to load kernel module: "configs", output: "modprobe: FATAL: Module configs not found in directory /lib/modules/5.4.41-1-pve\n", err: exit status 1
[preflight] If you know what you are doing, you can make a check non-fatal with --ignore-preflight-errors=...
To see the stack trace of this error execute with --v=5 or higher