Migrating to dual stack prevents the controller from starting

[Arno500]

Before creating an issue, make sure you've checked the following:

• You are running the latest released version of k0s
• Make sure you've searched for existing issues, both open and closed
• Make sure you've searched for PRs too, a fix might've been merged already
• You're looking at docs for the released version, "main" branch docs are usually ahead of released versions.

Platform

Linux 6.10.12-200.fc40.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Sep 30 21:38:25 UTC 2024 x86_64 GNU/Linux
NAME="Fedora Linux"
VERSION="40 (Server Edition)"
ID=fedora
VERSION_ID=40
VERSION_CODENAME=""
PLATFORM_ID="platform:f40"
PRETTY_NAME="Fedora Linux 40 (Server Edition)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:40"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f40/system-administrators-guide/"
SUPPORT_URL="https://ask.fedoraproject.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=40
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=40
SUPPORT_END=2025-05-13
VARIANT="Server Edition"
VARIANT_ID=server

Version

v1.31.1+k0s.1

Sysinfo

`k0s sysinfo`

Total memory: 30.7 GiB (pass)
File system of /var/lib/k0s: xfs (pass)
Disk space available for /var/lib/k0s: 266.0 GiB (pass)
Relative disk space available for /var/lib/k0s: 55% (pass)
Name resolution: localhost: [::1 127.0.0.1] (pass)
Operating system: Linux (pass)
  Linux kernel release: 6.10.12-200.fc40.x86_64 (pass)
  Max. file descriptors per process: current: 524288 / max: 524288 (pass)
  AppArmor: unavailable (pass)
  Executable in PATH: modprobe: /usr/sbin/modprobe (pass)
  Executable in PATH: mount: /usr/bin/mount (pass)
  Executable in PATH: umount: /usr/bin/umount (pass)
  /proc file system: mounted (0x9fa0) (pass)
  Control Groups: version 2 (pass)
    cgroup controller "cpu": available (is a listed root controller) (pass)
    cgroup controller "cpuacct": available (via cpu in version 2) (pass)
    cgroup controller "cpuset": available (is a listed root controller) (pass)
    cgroup controller "memory": available (is a listed root controller) (pass)
    cgroup controller "devices": unknown (warning: insufficient permissions, try with elevated permissions)
    cgroup controller "freezer": available (cgroup.freeze exists) (pass)
    cgroup controller "pids": available (is a listed root controller) (pass)
    cgroup controller "hugetlb": available (is a listed root controller) (pass)
    cgroup controller "blkio": available (via io in version 2) (pass)
  CONFIG_CGROUPS: Control Group support: built-in (pass)
    CONFIG_CGROUP_FREEZER: Freezer cgroup subsystem: built-in (pass)
    CONFIG_CGROUP_PIDS: PIDs cgroup subsystem: built-in (pass)
    CONFIG_CGROUP_DEVICE: Device controller for cgroups: built-in (pass)
    CONFIG_CPUSETS: Cpuset support: built-in (pass)
    CONFIG_CGROUP_CPUACCT: Simple CPU accounting cgroup subsystem: built-in (pass)
    CONFIG_MEMCG: Memory Resource Controller for Control Groups: built-in (pass)
    CONFIG_CGROUP_HUGETLB: HugeTLB Resource Controller for Control Groups: built-in (pass)
    CONFIG_CGROUP_SCHED: Group CPU scheduler: built-in (pass)
      CONFIG_FAIR_GROUP_SCHED: Group scheduling for SCHED_OTHER: built-in (pass)
        CONFIG_CFS_BANDWIDTH: CPU bandwidth provisioning for FAIR_GROUP_SCHED: built-in (pass)
    CONFIG_BLK_CGROUP: Block IO controller: built-in (pass)
  CONFIG_NAMESPACES: Namespaces support: built-in (pass)
    CONFIG_UTS_NS: UTS namespace: built-in (pass)
    CONFIG_IPC_NS: IPC namespace: built-in (pass)
    CONFIG_PID_NS: PID namespace: built-in (pass)
    CONFIG_NET_NS: Network namespace: built-in (pass)
  CONFIG_NET: Networking support: built-in (pass)
    CONFIG_INET: TCP/IP networking: built-in (pass)
      CONFIG_IPV6: The IPv6 protocol: built-in (pass)
    CONFIG_NETFILTER: Network packet filtering framework (Netfilter): built-in (pass)
      CONFIG_NETFILTER_ADVANCED: Advanced netfilter configuration: built-in (pass)
      CONFIG_NF_CONNTRACK: Netfilter connection tracking support: module (pass)
      CONFIG_NETFILTER_XTABLES: Netfilter Xtables support: built-in (pass)
        CONFIG_NETFILTER_XT_TARGET_REDIRECT: REDIRECT target support: module (pass)
        CONFIG_NETFILTER_XT_MATCH_COMMENT: "comment" match support: module (pass)
        CONFIG_NETFILTER_XT_MARK: nfmark target and match support: module (pass)
        CONFIG_NETFILTER_XT_SET: set target and match support: module (pass)
        CONFIG_NETFILTER_XT_TARGET_MASQUERADE: MASQUERADE target support: module (pass)
        CONFIG_NETFILTER_XT_NAT: "SNAT and DNAT" targets support: module (pass)
        CONFIG_NETFILTER_XT_MATCH_ADDRTYPE: "addrtype" address type match support: module (pass)
        CONFIG_NETFILTER_XT_MATCH_CONNTRACK: "conntrack" connection tracking match support: module (pass)
        CONFIG_NETFILTER_XT_MATCH_MULTIPORT: "multiport" Multiple port match support: module (pass)
        CONFIG_NETFILTER_XT_MATCH_RECENT: "recent" match support: module (pass)
        CONFIG_NETFILTER_XT_MATCH_STATISTIC: "statistic" match support: module (pass)
      CONFIG_NETFILTER_NETLINK: module (pass)
      CONFIG_NF_NAT: module (pass)
      CONFIG_IP_SET: IP set support: module (pass)
        CONFIG_IP_SET_HASH_IP: hash:ip set support: module (pass)
        CONFIG_IP_SET_HASH_NET: hash:net set support: module (pass)
      CONFIG_IP_VS: IP virtual server support: module (pass)
        CONFIG_IP_VS_NFCT: Netfilter connection tracking: built-in (pass)
        CONFIG_IP_VS_SH: Source hashing scheduling: module (pass)
        CONFIG_IP_VS_RR: Round-robin scheduling: module (pass)
        CONFIG_IP_VS_WRR: Weighted round-robin scheduling: module (pass)
      CONFIG_NF_CONNTRACK_IPV4: IPv4 connetion tracking support (required for NAT): unknown (warning)
      CONFIG_NF_REJECT_IPV4: IPv4 packet rejection: module (pass)
      CONFIG_NF_NAT_IPV4: IPv4 NAT: unknown (warning)
      CONFIG_IP_NF_IPTABLES: IP tables support: module (pass)
        CONFIG_IP_NF_FILTER: Packet filtering: module (pass)
          CONFIG_IP_NF_TARGET_REJECT: REJECT target support: module (pass)
        CONFIG_IP_NF_NAT: iptables NAT support: module (pass)
        CONFIG_IP_NF_MANGLE: Packet mangling: module (pass)
      CONFIG_NF_DEFRAG_IPV4: module (pass)
      CONFIG_NF_CONNTRACK_IPV6: IPv6 connetion tracking support (required for NAT): unknown (warning)
      CONFIG_NF_NAT_IPV6: IPv6 NAT: unknown (warning)
      CONFIG_IP6_NF_IPTABLES: IP6 tables support: module (pass)
        CONFIG_IP6_NF_FILTER: Packet filtering: module (pass)
        CONFIG_IP6_NF_MANGLE: Packet mangling: module (pass)
        CONFIG_IP6_NF_NAT: ip6tables NAT support: module (pass)
      CONFIG_NF_DEFRAG_IPV6: module (pass)
    CONFIG_BRIDGE: 802.1d Ethernet Bridging: module (pass)
      CONFIG_LLC: module (pass)
      CONFIG_STP: module (pass)
  CONFIG_EXT4_FS: The Extended 4 (ext4) filesystem: built-in (pass)
  CONFIG_PROC_FS: /proc file system support: built-in (pass)

What happened?

Migrating from IPv4 only to dual stack prevent the controller from starting, with the following error:

failed to mark cidr[10.244.0.0/24] at idx [0] as occupied for node: serveur: cidr 10.244.0.0/24 is out the range of cluster cidr fd00::/108

Steps to reproduce

1. Setup a cluster with k0s without dual stack enabled
2. Start it, use it, run pods, etc...
3. Stop the cluster
4. Enable dual stack support, add required CIDRs like in this documentation: https://docs.k0sproject.io/stable/dual-stack/
5. Start it again

Expected behavior

Everything should start as expected

Actual behavior

The controller boot loop with the following error lines in my logs:

INFO[2024-10-13 22:51:32] E1013 22:51:32.153346   62057 controllermanager.go:771] "Error starting controller" err="failed to mark cidr[10.244.0.0/24] at idx [0] as occupied for node: serveur: cidr 10.244.0.0/24 is out the range of cluster cidr fd00::/108" controller="node-ipam-controller"  component=kube-controller-manager stream=stderr
INFO[2024-10-13 22:51:32] E1013 22:51:32.153367   62057 controllermanager.go:247] "Error starting controllers" err="failed to mark cidr[10.244.0.0/24] at idx [0] as occupied for node: serveur: cidr 10.244.0.0/24 is out the range of cluster cidr fd00::/108"  component=kube-controller-manager stream=stderr

Screenshots and logs

No response

Additional context

Seems this fix would have worked in my situation, but was not deemed satisfactory enough.

[github-actions]

The issue is marked as stale since no activity has been recorded in 30 days