Today I rebooted a LXD host, after which some containers fail to start/launch at all, some start but have an effectively unwritable filesystem and others work just fine.
The non starting/launching error:
root@myhost:~# lxc launch ubuntu:22.04 mytest
Creating mytest
Starting mytest
Error: Failed to run: /snap/lxd/current/bin/lxd forkstart mytest /var/snap/lxd/common/lxd/containers /var/snap/lxd/common/lxd/logs/mytest/lxc.conf: exit status 1
Try `lxc info --show-log local:mytest` for more info
root@myhost:~# lxc info --show-log local:mytest
Name: mytest
Status: STOPPED
Type: container
Architecture: x86_64
Created: 2022/09/24 09:10 CEST
Last Used: 2022/09/24 09:10 CEST
Log:
lxc mytest 20220924071039.439 WARN conf - ../src/src/lxc/conf.c:lxc_map_ids:3592 - newuidmap binary is missing
lxc mytest 20220924071039.439 WARN conf - ../src/src/lxc/conf.c:lxc_map_ids:3598 - newgidmap binary is missing
lxc mytest 20220924071039.439 WARN conf - ../src/src/lxc/conf.c:lxc_map_ids:3592 - newuidmap binary is missing
lxc mytest 20220924071039.439 WARN conf - ../src/src/lxc/conf.c:lxc_map_ids:3598 - newgidmap binary is missing
lxc mytest 20220924071039.586 ERROR conf - ../src/src/lxc/conf.c:run_buffer:321 - Script exited with status 1
lxc mytest 20220924071039.586 ERROR conf - ../src/src/lxc/conf.c:lxc_setup:4400 - Failed to run mount hooks
lxc mytest 20220924071039.586 ERROR start - ../src/src/lxc/start.c:do_start:1272 - Failed to setup container "mytest"
lxc mytest 20220924071039.586 ERROR sync - ../src/src/lxc/sync.c:sync_wait:34 - An error occurred in another process (expected sequence number 4)
lxc mytest 20220924071039.588 WARN network - ../src/src/lxc/network.c:lxc_delete_network_priv:3631 - Failed to rename interface with index 0 from "eth0" to its initial name "veth6d5202fe"
lxc mytest 20220924071039.588 ERROR lxccontainer - ../src/src/lxc/lxccontainer.c:wait_on_daemonized_start:877 - Received container state "ABORTING" instead of "RUNNING"
lxc mytest 20220924071039.588 ERROR start - ../src/src/lxc/start.c:__lxc_start:2107 - Failed to spawn container "mytest"
lxc mytest 20220924071039.588 WARN start - ../src/src/lxc/start.c:lxc_abort:1036 - No such process - Failed to send SIGKILL via pidfd 17 for process 117604
lxc mytest 20220924071044.665 WARN conf - ../src/src/lxc/conf.c:lxc_map_ids:3592 - newuidmap binary is missing
lxc mytest 20220924071044.665 WARN conf - ../src/src/lxc/conf.c:lxc_map_ids:3598 - newgidmap binary is missing
lxc 20220924071044.712 ERROR af_unix - ../src/src/lxc/af_unix.c:lxc_abstract_unix_recv_fds_iov:218 - Connection reset by peer - Failed to receive response
lxc 20220924071044.712 ERROR commands - ../src/src/lxc/commands.c:lxc_cmd_rsp_recv_fds:128 - Failed to receive file descriptors for command "get_state"
root@myhost:~# lxc config show mytest
architecture: x86_64
config:
image.architecture: amd64
image.description: ubuntu 22.04 LTS amd64 (release) (20220923)
image.label: release
image.os: ubuntu
image.release: jammy
image.serial: "20220923"
image.type: squashfs
image.version: "22.04"
volatile.base_image: 4979c8f15a0003b2b72cac34e9676b4107ae330874935284d0ba5d54199c7744
volatile.cloud-init.instance-id: 22294696-6b4d-401d-82af-b7f88f3a0fba
volatile.eth0.hwaddr: 00:16:3e:72:5b:fa
volatile.idmap.base: "0"
volatile.idmap.current: '[{"Isuid":true,"Isgid":false,"Hostid":1000000,"Nsid":0,"Maprange":1000000000},{"Isuid":false,"Isgid":true,"Hostid":1000000,"Nsid":0,"Maprange":1000000000}]'
volatile.idmap.next: '[{"Isuid":true,"Isgid":false,"Hostid":1000000,"Nsid":0,"Maprange":1000000000},{"Isuid":false,"Isgid":true,"Hostid":1000000,"Nsid":0,"Maprange":1000000000}]'
volatile.last_state.idmap: '[]'
volatile.last_state.power: STOPPED
volatile.last_state.ready: "false"
volatile.uuid: f7fcf1ac-7a90-4a8c-9ff3-d3c1f948c7c2
devices: {}
ephemeral: false
profiles:
- default
stateful: false
description: ""
The effectively unwritable filesystem problem:
root@myhost:~# lxc exec mycontainer bash
root@mycontainer:~# touch test
touch: cannot touch 'test': Value too large for defined data type
root@myhost:~# lxc config show mycontainer
architecture: x86_64
config:
boot.autostart: "1"
limits.cpu: "2"
limits.memory: 4GB
limits.memory.enforce: hard
limits.memory.swap: "false"
security.privileged: "false"
volatile.base_image: 3e50ba589426c21f26370e2f949f30210f2d0419fbb9d4d4a0f860a035373353
volatile.cloud-init.instance-id: 467a728d-2fbd-427d-94be-2f3fbcd0e676
volatile.eth0.host_name: veth9216d5d3
volatile.eth0.hwaddr: 00:16:3e:64:17:c8
volatile.idmap.base: "0"
volatile.idmap.current: '[{"Isuid":true,"Isgid":false,"Hostid":1000000,"Nsid":0,"Maprange":1000000000},{"Isuid":false,"Isgid":true,"Hostid":1000000,"Nsid":0,"Maprange":1000000000}]'
volatile.idmap.next: '[{"Isuid":true,"Isgid":false,"Hostid":1000000,"Nsid":0,"Maprange":1000000000},{"Isuid":false,"Isgid":true,"Hostid":1000000,"Nsid":0,"Maprange":1000000000}]'
volatile.last_state.idmap: '[]'
volatile.last_state.power: RUNNING
volatile.last_state.ready: "false"
volatile.uuid: 6bc4ae93-7982-4c59-bdfb-a47f8330a6f3
devices:
data:
path: /tank/data
source: /tank/data
type: disk
root:
path: /
pool: default
type: disk
ephemeral: false
profiles:
- default
stateful: false
description: ""
root@myhost:~# lxc info
config: {}
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
- instances_nic_host_name
- image_copy_profile
- container_syscall_intercept_sysinfo
- clustering_evacuation_mode
- resources_pci_vpd
- qemu_raw_conf
- storage_cephfs_fscache
- network_load_balancer
- vsock_api
- instance_ready_state
- network_bgp_holdtime
- storage_volumes_all_projects
- metrics_memory_oom_total
- storage_buckets
api_status: stable
api_version: "1.0"
auth: trusted
public: false
auth_methods:
- tls
environment:
addresses: []
architectures:
- x86_64
- i686
certificate: ...
certificate_fingerprint: 9f38dcb24af27a73fb1ad8c1feb3920a7e02a378ae041b64a4446ead2bd58405
driver: qemu | lxc
driver_version: 7.0.0 | 5.0.1
firewall: nftables
kernel: Linux
kernel_architecture: x86_64
kernel_features:
idmapped_mounts: "true"
netnsid_getifaddrs: "true"
seccomp_listener: "true"
seccomp_listener_continue: "true"
shiftfs: "true"
uevent_injection: "true"
unpriv_fscaps: "true"
kernel_version: 5.15.0-48-generic
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: false
server_event_mode: full-mesh
server_name: myhost
server_pid: 4704
server_version: "5.5"
storage: zfs
storage_version: 2.1.4-0ubuntu0.1
storage_supported_drivers:
- 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: 2.1.4-0ubuntu0.1
remote: false
- name: btrfs
version: 5.4.1
remote: false
- name: ceph
version: 15.2.16
remote: true
- name: cephfs
version: 15.2.16
remote: true
- name: cephobject
version: 15.2.16
remote: true
The host had been running fine since the last reboot 18 days ago. Other than applying updates no noteworthy change was made before the reboot.
Regarding the “unwritable” filesystems I found some references to ulimits, but these have bee adjusted on the host like
* soft nofile 1048576
* hard nofile 1048576
root soft nofile 1048576
root hard nofile 1048576
* soft memlock unlimited
* hard memlock unlimited