nerdctl remove a container but leave iptables policy

[feijungo]

problem

After run command with root as bellow

nerdctl run -d --name test nginx:latest
nerdctl stop test && nerdctl rm test

Iptables nat policies residue in iptables, Improper configuration or other reasons, need help.
Policies as bellow

-A POSTROUTING -s 10.4.0.58/32 -m comment --comment "name: \"bridge\" id: \"default-793da9239e86f3ad91563d388bbd966f13b4c017a08385af2bdf6435652c57d7\"" -j CNI-df0305bc7d5326a953bd3cc7

-N CNI-df0305bc7d5326a953bd3cc7
-A POSTROUTING -s 10.4.0.58/32 -m comment --comment "name: \"bridge\" id: \"default-793da9239e86f3ad91563d388bbd966f13b4c017a08385af2bdf6435652c57d7\"" -j CNI-df0305bc7d5326a953bd3cc7
-A CNI-df0305bc7d5326a953bd3cc7 -d 10.4.0.0/24 -m comment --comment "name: \"bridge\" id: \"default-793da9239e86f3ad91563d388bbd966f13b4c017a08385af2bdf6435652c57d7\"" -j ACCEPT
-A CNI-df0305bc7d5326a953bd3cc7 ! -d 224.0.0.0/4 -m comment --comment "name: \"bridge\" id: \"default-793da9239e86f3ad91563d388bbd966f13b4c017a08385af2bdf6435652c57d7\"" -j MASQUERADE

enviroment:

nerdctl version 0.20.0
containerd v1.5.17

configuration:

network network bridge setting

[
    {
        "Name": "bridge",
        "Id": "0",
        "IPAM": {
            "Config": [
                {
                    "Subnet": "10.4.0.0/24",
                    "Gateway": "10.4.0.1"
                }
            ]
        },
        "Labels": {}
    }
]

containerd config.toml

version = 2
root = "/data/containerd"
state = "/run/containerd"
plugin_dir = ""
disabled_plugins = []
required_plugins = []
oom_score = 0

[grpc]
  address = "/run/containerd/containerd.sock"
  tcp_address = ""
  tcp_tls_cert = ""
  tcp_tls_key = ""
  uid = 0
  gid = 0
  max_recv_message_size = 16777216
  max_send_message_size = 16777216

[ttrpc]
  address = ""
  uid = 0
  gid = 0

[debug]
  address = ""
  uid = 0
  gid = 0
  level = "debug"

[metrics]
  address = ""
  grpc_histogram = false

[cgroup]
  path = ""

[timeouts]
  "io.containerd.timeout.shim.cleanup" = "5s"
  "io.containerd.timeout.shim.load" = "5s"
  "io.containerd.timeout.shim.shutdown" = "3s"
  "io.containerd.timeout.task.state" = "2s"

[plugins]
  [plugins."io.containerd.gc.v1.scheduler"]
    pause_threshold = 0.02
    deletion_threshold = 0
    mutation_threshold = 100
    schedule_delay = "0s"
    startup_delay = "100ms"
  [plugins."io.containerd.grpc.v1.cri"]
    disable_tcp_service = true
    stream_server_address = "127.0.0.1"
    stream_server_port = "0"
    stream_idle_timeout = "4h0m0s"
    enable_selinux = false
    selinux_category_range = 1024
    sandbox_image = ""
    stats_collect_period = 10
    systemd_cgroup = false
    enable_tls_streaming = false
    max_container_log_line_size = 16384
    disable_cgroup = false
    disable_apparmor = false
    restrict_oom_score_adj = false
    max_concurrent_downloads = 3
    disable_proc_mount = false
    unset_seccomp_profile = ""
    tolerate_missing_hugetlb_controller = true
    disable_hugetlb_controller = true
    ignore_image_defined_volumes = false
    [plugins."io.containerd.grpc.v1.cri".containerd]
      snapshotter = "overlayfs"
      default_runtime_name = "runc"
      no_pivot = false
      disable_snapshot_annotations = true
      discard_unpacked_layers = false
      [plugins."io.containerd.grpc.v1.cri".containerd.default_runtime]
        runtime_type = ""
        runtime_engine = ""
        runtime_root = ""
        privileged_without_host_devices = false
        base_runtime_spec = ""
      [plugins."io.containerd.grpc.v1.cri".containerd.untrusted_workload_runtime]
        runtime_type = ""
        runtime_engine = ""
        runtime_root = ""
        privileged_without_host_devices = false
        base_runtime_spec = ""
      [plugins."io.containerd.grpc.v1.cri".containerd.runtimes]
        [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
          runtime_type = "io.containerd.runc.v2"
          runtime_engine = ""
          runtime_root = ""
          privileged_without_host_devices = false
          base_runtime_spec = ""
          [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
            SystemdCgroup = true
            LogLevel = "debug"
    [plugins."io.containerd.grpc.v1.cri".cni]
      bin_dir = "/usr/local/libexec/cni/"
      conf_dir = "/etc/cni/net.d"
      max_conf_num = 1
      conf_template = ""

    [plugins."io.containerd.grpc.v1.cri".image_decryption]
      key_model = ""
    [plugins."io.containerd.grpc.v1.cri".x509_key_pair_streaming]
      tls_cert_file = ""
      tls_key_file = ""
  [plugins."io.containerd.internal.v1.opt"]
    path = "/opt/containerd"
  [plugins."io.containerd.internal.v1.restart"]
    interval = "10s"
  [plugins."io.containerd.metadata.v1.bolt"]
    content_sharing_policy = "shared"
  [plugins."io.containerd.monitor.v1.cgroups"]
    no_prometheus = false
  [plugins."io.containerd.runtime.v1.linux"]
    shim = "containerd-shim"
    runtime = "runc"
    runtime_root = ""
    no_shim = false
    shim_debug = false
  [plugins."io.containerd.runtime.v2.task"]
  [plugins."io.containerd.service.v1.diff-service"]
    default = ["walking"]
  [plugins."io.containerd.snapshotter.v1.devmapper"]
    root_path = ""
    pool_name = ""
    base_image_size = ""
    async_remove = false

[apostasie]

Thanks @feijungo

nerdctl version 0.20.0
containerd v1.5.17

^ these are outdated and out of support.
It is unlikely either of these will receive any patch / update.

Suggesting you upgrade to at least containerd 1.6 (preferably 2.0), and at least nerdctl 1.7 (preferably 2.0), and open a new ticket if the issue persists.

Many fixes have been merged WRT to cni stability in the past few months.

[feijungo]

Thanks for your reply, I'll try it.