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Error: `argument list too long` on wide ranges over OVN backed network forwards
Required information
- Distribution:
- Distribution version:
- The output of "snap list --all lxd core20 core22 core24 snapd":
Name Version Rev Tracking Publisher Notes
core20 20231123 2105 latest/stable canonical✓ base,disabled
core20 20240111 2182 latest/stable canonical✓ base
core22 20240111 1122 latest/stable canonical✓ base
lxd 5.0.3-ffb17cf 27037 5.0/stable canonical✓ -
snapd 2.61.1 20671 latest/stable canonical✓ snapd
- The output of "lxc info" or if that fails:
config:
cluster.https_address: 10.246.192.128:8443
core.https_address: 10.246.192.128:8443
network.ovn.northbound_connection: tcp:10.246.192.128:6641,tcp:10.246.192.188:6641,tcp:10.246.192.6:6641
api_extensions:
- storage_zfs_remove_snapshots
- container_host_shutdown_timeout
- container_stop_priority
- container_syscall_filtering
- auth_pki
- container_last_used_at
- etag
- patch
- usb_devices
- https_allowed_credentials
- image_compression_algorithm
- directory_manipulation
- container_cpu_time
- storage_zfs_use_refquota
- storage_lvm_mount_options
- network
- profile_usedby
- container_push
- container_exec_recording
- certificate_update
- container_exec_signal_handling
- gpu_devices
- container_image_properties
- migration_progress
- id_map
- network_firewall_filtering
- network_routes
- storage
- file_delete
- file_append
- network_dhcp_expiry
- storage_lvm_vg_rename
- storage_lvm_thinpool_rename
- network_vlan
- image_create_aliases
- container_stateless_copy
- container_only_migration
- storage_zfs_clone_copy
- unix_device_rename
- storage_lvm_use_thinpool
- storage_rsync_bwlimit
- network_vxlan_interface
- storage_btrfs_mount_options
- entity_description
- image_force_refresh
- storage_lvm_lv_resizing
- id_map_base
- file_symlinks
- container_push_target
- network_vlan_physical
- storage_images_delete
- container_edit_metadata
- container_snapshot_stateful_migration
- storage_driver_ceph
- storage_ceph_user_name
- resource_limits
- storage_volatile_initial_source
- storage_ceph_force_osd_reuse
- storage_block_filesystem_btrfs
- resources
- kernel_limits
- storage_api_volume_rename
- macaroon_authentication
- network_sriov
- console
- restrict_devlxd
- migration_pre_copy
- infiniband
- maas_network
- devlxd_events
- proxy
- network_dhcp_gateway
- file_get_symlink
- network_leases
- unix_device_hotplug
- storage_api_local_volume_handling
- operation_description
- clustering
- event_lifecycle
- storage_api_remote_volume_handling
- nvidia_runtime
- container_mount_propagation
- container_backup
- devlxd_images
- container_local_cross_pool_handling
- proxy_unix
- proxy_udp
- clustering_join
- proxy_tcp_udp_multi_port_handling
- network_state
- proxy_unix_dac_properties
- container_protection_delete
- unix_priv_drop
- pprof_http
- proxy_haproxy_protocol
- network_hwaddr
- proxy_nat
- network_nat_order
- container_full
- candid_authentication
- backup_compression
- candid_config
- nvidia_runtime_config
- storage_api_volume_snapshots
- storage_unmapped
- projects
- candid_config_key
- network_vxlan_ttl
- container_incremental_copy
- usb_optional_vendorid
- snapshot_scheduling
- snapshot_schedule_aliases
- container_copy_project
- clustering_server_address
- clustering_image_replication
- container_protection_shift
- snapshot_expiry
- container_backup_override_pool
- snapshot_expiry_creation
- network_leases_location
- resources_cpu_socket
- resources_gpu
- resources_numa
- kernel_features
- id_map_current
- event_location
- storage_api_remote_volume_snapshots
- network_nat_address
- container_nic_routes
- rbac
- cluster_internal_copy
- seccomp_notify
- lxc_features
- container_nic_ipvlan
- network_vlan_sriov
- storage_cephfs
- container_nic_ipfilter
- resources_v2
- container_exec_user_group_cwd
- container_syscall_intercept
- container_disk_shift
- storage_shifted
- resources_infiniband
- daemon_storage
- instances
- image_types
- resources_disk_sata
- clustering_roles
- images_expiry
- resources_network_firmware
- backup_compression_algorithm
- ceph_data_pool_name
- container_syscall_intercept_mount
- compression_squashfs
- container_raw_mount
- container_nic_routed
- container_syscall_intercept_mount_fuse
- container_disk_ceph
- virtual-machines
- image_profiles
- clustering_architecture
- resources_disk_id
- storage_lvm_stripes
- vm_boot_priority
- unix_hotplug_devices
- api_filtering
- instance_nic_network
- clustering_sizing
- firewall_driver
- projects_limits
- container_syscall_intercept_hugetlbfs
- limits_hugepages
- container_nic_routed_gateway
- projects_restrictions
- custom_volume_snapshot_expiry
- volume_snapshot_scheduling
- trust_ca_certificates
- snapshot_disk_usage
- clustering_edit_roles
- container_nic_routed_host_address
- container_nic_ipvlan_gateway
- resources_usb_pci
- resources_cpu_threads_numa
- resources_cpu_core_die
- api_os
- container_nic_routed_host_table
- container_nic_ipvlan_host_table
- container_nic_ipvlan_mode
- resources_system
- images_push_relay
- network_dns_search
- container_nic_routed_limits
- instance_nic_bridged_vlan
- network_state_bond_bridge
- usedby_consistency
- custom_block_volumes
- clustering_failure_domains
- resources_gpu_mdev
- console_vga_type
- projects_limits_disk
- network_type_macvlan
- network_type_sriov
- container_syscall_intercept_bpf_devices
- network_type_ovn
- projects_networks
- projects_networks_restricted_uplinks
- custom_volume_backup
- backup_override_name
- storage_rsync_compression
- network_type_physical
- network_ovn_external_subnets
- network_ovn_nat
- network_ovn_external_routes_remove
- tpm_device_type
- storage_zfs_clone_copy_rebase
- gpu_mdev
- resources_pci_iommu
- resources_network_usb
- resources_disk_address
- network_physical_ovn_ingress_mode
- network_ovn_dhcp
- network_physical_routes_anycast
- projects_limits_instances
- network_state_vlan
- instance_nic_bridged_port_isolation
- instance_bulk_state_change
- network_gvrp
- instance_pool_move
- gpu_sriov
- pci_device_type
- storage_volume_state
- network_acl
- migration_stateful
- disk_state_quota
- storage_ceph_features
- projects_compression
- projects_images_remote_cache_expiry
- certificate_project
- network_ovn_acl
- projects_images_auto_update
- projects_restricted_cluster_target
- images_default_architecture
- network_ovn_acl_defaults
- gpu_mig
- project_usage
- network_bridge_acl
- warnings
- projects_restricted_backups_and_snapshots
- clustering_join_token
- clustering_description
- server_trusted_proxy
- clustering_update_cert
- storage_api_project
- server_instance_driver_operational
- server_supported_storage_drivers
- event_lifecycle_requestor_address
- resources_gpu_usb
- clustering_evacuation
- network_ovn_nat_address
- network_bgp
- network_forward
- custom_volume_refresh
- network_counters_errors_dropped
- metrics
- image_source_project
- clustering_config
- network_peer
- linux_sysctl
- network_dns
- ovn_nic_acceleration
- certificate_self_renewal
- instance_project_move
- storage_volume_project_move
- cloud_init
- network_dns_nat
- database_leader
- instance_all_projects
- clustering_groups
- ceph_rbd_du
- instance_get_full
- qemu_metrics
- gpu_mig_uuid
- event_project
- clustering_evacuation_live
- instance_allow_inconsistent_copy
- network_state_ovn
- storage_volume_api_filtering
- image_restrictions
- storage_zfs_export
- network_dns_records
- storage_zfs_reserve_space
- network_acl_log
- storage_zfs_blocksize
- metrics_cpu_seconds
- instance_snapshot_never
- certificate_token
- instance_nic_routed_neighbor_probe
- event_hub
- agent_nic_config
- projects_restricted_intercept
- metrics_authentication
- images_target_project
- cluster_migration_inconsistent_copy
- cluster_ovn_chassis
- container_syscall_intercept_sched_setscheduler
- storage_lvm_thinpool_metadata_size
- storage_volume_state_total
- instance_file_head
- resources_pci_vpd
- qemu_raw_conf
- storage_cephfs_fscache
- vsock_api
- storage_volumes_all_projects
- projects_networks_restricted_access
- cluster_join_token_expiry
- remote_token_expiry
- init_preseed
- cpu_hotplug
- storage_pool_source_wipe
- zfs_block_mode
- instance_generation_id
- disk_io_cache
- storage_pool_loop_resize
- migration_vm_live
- auth_user
- instances_state_total
- numa_cpu_placement
- network_allocations
- storage_api_remote_volume_snapshot_copy
- zfs_delegate
- operations_get_query_all_projects
- event_lifecycle_name_and_project
- instances_nic_limits_priority
- operation_wait
- cluster_internal_custom_volume_copy
- instance_move_config
api_status: stable
api_version: "1.0"
auth: trusted
public: false
auth_methods:
- tls
auth_user_name: root
auth_user_method: unix
environment:
addresses:
- 10.246.192.128:8443
architectures:
- x86_64
- i686
certificate: |
-----BEGIN CERTIFICATE-----
MIICATCCAYagA
-----END CERTIFICATE-----
certificate_fingerprint: dff9f73dea3
driver: qemu | lxc
driver_version: 8.0.5 | 5.0.3
firewall: nftables
kernel: Linux
kernel_architecture: x86_64
kernel_features:
idmapped_mounts: "true"
netnsid_getifaddrs: "true"
seccomp_listener: "true"
seccomp_listener_continue: "true"
shiftfs: "false"
uevent_injection: "true"
unpriv_fscaps: "true"
kernel_version: 5.15.0-1050-kvm
lxc_features:
cgroup2: "true"
core_scheduling: "true"
devpts_fd: "true"
idmapped_mounts_v2: "true"
mount_injection_file: "true"
network_gateway_device_route: "true"
network_ipvlan: "true"
network_l2proxy: "true"
network_phys_macvlan_mtu: "true"
network_veth_router: "true"
pidfd: "true"
seccomp_allow_deny_syntax: "true"
seccomp_notify: "true"
seccomp_proxy_send_notify_fd: "true"
os_name: Ubuntu
os_version: "22.04"
project: default
server: lxd
server_clustered: true
server_event_mode: full-mesh
server_name: lxd01
server_pid: 1561
server_version: 5.0.3
storage: zfs
storage_version: 2.1.5-1ubuntu6~22.04.2
storage_supported_drivers:
- name: cephfs
version: 15.2.17
remote: true
- name: cephobject
version: 15.2.17
remote: true
- name: dir
version: "1"
remote: false
- name: lvm
version: 2.03.07(2) (2019-11-30) / 1.02.167 (2019-11-30) / 4.45.0
remote: false
- name: zfs
version: 2.1.5-1ubuntu6~22.04.2
remote: false
- name: btrfs
version: 5.4.1
remote: false
- name: ceph
version: 15.2.17
remote: true
Issue description
Very wide ranges (20000 ports) defined on a OVN-backed network forward throws the error:
/snap/lxd/27037/bin/ovn-nbctl: argument list too long
this is something was also happening on “normal” network forward, and then fixed.
The use case is a WebRTC-based application.
Mentioned first in this thread.
Steps to reproduce
Information to attach
I've run into a similar issue with ovn 24.03; ovn-nbctl eventually times out with:
2024-10-31T21:26:05Z|00003|jsonrpc|WARN|ssl:10.24.158.110:6641: send error: Broken pipe
2024-10-31T21:26:05Z|00004|timeval|WARN|Unreasonably long 12235ms poll interval (12227ms user, 6ms system)
2024-10-31T21:26:05Z|00005|timeval|WARN|faults: 761 minor, 0 major
2024-10-31T21:26:05Z|00006|timeval|WARN|context switches: 0 voluntary, 36 involuntary
2024-10-31T21:26:05Z|00018|fatal_signal|WARN|terminating with signal 14 (Alarm clock))
LXD flattens port ranges into a list of all the ports in the range. This is needed because ovn-nbctl lb-add does not support port ranges. This mirrors the structure of the OVN northbound database, which stores VIP->ENDPOINT mappings with optional ports, like:
10.24.158.18 10.252.161.8
10.24.158.19:22 10.252.161.2:22
I doubt we'll be able to get much traction upstream for implementing port ranges in ovn.
I've tried splitting the ovn-nbctl commands used by LoadBalancerApply into batches of 1000 vips, but ovn-nbctl still times out. Indeed, the last command in this series fails:
$ lxc network forward port add default 10.24.158.19 tcp 21-1021 10.252.161.2
$ lxc network forward port add default 10.24.158.19 tcp 1022-2021 10.252.161.2
$ lxc network forward port add default 10.24.158.19 tcp 2022-3021 10.252.161.2
$ lxc network forward port add default 10.24.158.19 tcp 3022-4021 10.252.161.2
My guess is that ovn/ovsdb are doing some quadratic time (or worse) operation over the entire set of vips. LXD sets a default timeout of 10s for ovn-nbctl commands. We could consider increasing the timeout, but that's inelegant and unlikely to get more than a handful more ports.
@pmarini-nc I'm not super clear on the use case for such a large range of ports on one forward; is there a reason you'd prefer a large number of port forwards over a VIP for the entire port range?
We're planning a switch to using the ovs DB client package directly, rather than ovn-nbctl, so this may help increase the workable limits.
