Machine state will be reset. To keep it, pass --keep-machine-state start all VLans (finished: start all VLans, in 0.00 seconds) Test will time out and terminate in 3600.0 seconds run the VM test script additionally exposed symbols: admin1, peer1, vlan1, start_all, test_script, machines, machines_qemu, machines_nspawn, vlans, driver, log, os, create_machine, subtest, run_tests, join_all, retry, serial_stdout_off, serial_stdout_on, polling_condition, BaseMachine, QemuMachine, NspawnMachine, t, debug, dump_machine_ssh start all VMs admin1: systemd-nspawn running (pid 52) peer1: systemd-nspawn running (pid 53) admin1: Waiting for journal at /build/vm-state-admin1/var/log/journal... peer1: Waiting for journal at /build/vm-state-peer1/var/log/journal... (finished: start all VMs, in 0.00 seconds) admin1: waiting for unit multi-user.target nixos-nspawn(admin1): TAP vde-tap1 not found; container will be isolated from VDE nixos-nspawn(admin1): A common reason for this is that /dev/net is not available in the Nix sandbox. Try adding /dev/net to extra-sandbox-paths. nixos-nspawn(peer1): TAP vde-tap1 not found; container will be isolated from VDE nixos-nspawn(peer1): A common reason for this is that /dev/net is not available in the Nix sandbox. Try adding /dev/net to extra-sandbox-paths. Note: in a future version of systemd-nspawn the default set of permitted socket address families will be restricted to AF_INET, AF_INET6 and AF_UNIX. Use --restrict-address-families= to configure the set of permitted socket address families, or set RestrictAddressFamilies= in a .nspawn file. Note: in a future version of systemd-nspawn the default set of permitted socket address families will be restricted to AF_INET, AF_INET6 and AF_UNIX. Use --restrict-address-families= to configure the set of permitted socket address families, or set RestrictAddressFamilies= in a .nspawn file. ░ Spawning container admin1 on /build/vm-state-admin1. ░ Spawning container peer1 on /build/vm-state-peer1. admin1 # No journal files were found. admin1 # No journal boot entry found for the specified boot (+0). peer1 # No journal files were found. peer1 # No journal boot entry found for the specified boot (+0). peer1 # [6137385.730825] peer1 systemd-journald[78]: Journal started peer1 # [6137385.730885] peer1 systemd-journald[78]: Runtime Journal (/run/log/journal/5ebccb1f27994a55b1414572dba9d7fa) is 8M, max 2.5G, 2.4G free. peer1 # [6137385.740645] peer1 systemd[1]: Starting Flush Journal to Persistent Storage... peer1 # [6137385.741544] peer1 systemd[1]: Starting Network Name Resolution... peer1 # [6137385.742398] peer1 systemd[1]: Starting Create Static Device Nodes in /dev... peer1 # [6137385.750512] peer1 systemd-journald[78]: Time spent on flushing to /var/log/journal/5ebccb1f27994a55b1414572dba9d7fa is 1.467ms for 5 entries. peer1 # [6137385.750512] peer1 systemd-journald[78]: System Journal (/var/log/journal/5ebccb1f27994a55b1414572dba9d7fa) is 8M, max 4G, 3.9G free. peer1 # [6137385.757782] peer1 systemd[1]: Finished Create Static Device Nodes in /dev. peer1 # [6137385.758023] peer1 systemd[1]: Reached target Preparation for Local File Systems. peer1 # [6137385.758187] peer1 systemd[1]: Reached target Local File Systems. peer1 # [6137385.758996] peer1 systemd[1]: Listening on Boot Loader Control Service Socket. peer1 # [6137385.759040] peer1 systemd[1]: Update Boot Loader Random Seed skipped, unmet condition check ConditionVirtualization=!container admin1 # [6137385.725808] admin1 systemd-journald[69]: Journal started peer1 # [6137385.759930] peer1 systemd[1]: Starting Save Transient machine-id to Disk... admin1 # [6137385.725858] admin1 systemd-journald[69]: Runtime Journal (/run/log/journal/98fa37e2dc204175bb4a404f3ad72213) is 8M, max 2.5G, 2.4G free. peer1 # [6137385.759968] peer1 systemd[1]: Rule-based Manager for Device Events and Files skipped, unmet condition check ConditionPathIsReadWrite=/sys admin1 # [6137385.735285] admin1 systemd[1]: Finished Create Static Device Nodes in /dev gracefully. peer1 # [6137385.839091] peer1 systemd[1]: Finished Flush Journal to Persistent Storage. peer1 # [6137385.840874] peer1 systemd[1]: Starting Create System Files and Directories... peer1 # [6137385.888292] peer1 systemd[1]: Finished Firewall. peer1 # [6137385.888535] peer1 systemd[1]: Reached target Preparation for Network. peer1 # [6137385.888739] peer1 systemd[1]: Listening on Network Management Resolve Hook Socket. peer1 # [6137385.889790] peer1 systemd[1]: Starting Network Management... peer1 # [6137385.901503] peer1 systemd-tmpfiles[161]: Cannot set file attributes for '/var/empty', value=0x00000010, mask=0x00000010, ignoring: Operation not permitted peer1 # [6137385.901719] peer1 systemd-tmpfiles[161]: fchmod() of /var/log/journal failed: Operation not permitted peer1 # [6137385.901873] peer1 systemd-tmpfiles[161]: fchmod() of /var/log/journal/5ebccb1f27994a55b1414572dba9d7fa failed: Operation not permitted peer1 # [6137385.902102] peer1 systemd-tmpfiles[161]: fchmod() of /run/log/journal failed: Operation not permitted peer1 # [6137385.905225] peer1 systemd[1]: Finished Create System Files and Directories. peer1 # [6137385.906562] peer1 systemd[1]: Starting Rebuild Journal Catalog... peer1 # [6137385.907641] peer1 systemd[1]: Starting Record System Boot/Shutdown in UTMP... peer1 # [6137385.920195] peer1 systemd[1]: Finished Record System Boot/Shutdown in UTMP. peer1 # [6137385.926823] peer1 systemd[1]: Finished Rebuild Journal Catalog. peer1 # [6137385.927906] peer1 systemd[1]: Starting Update is Completed... peer1 # [6137385.939798] peer1 systemd[1]: Finished Update is Completed. peer1 # [6137386.296579] peer1 systemd-networkd[184]: Failed to increase receive buffer size for general netlink socket, ignoring: Operation not permitted peer1 # [6137386.296674] peer1 systemd-networkd[184]: Failed to increase receive buffer size for nftables netlink socket, ignoring: Operation not permitted peer1 # [6137386.304657] peer1 systemd-networkd[184]: /etc/systemd/network/99-ethernet-default-dhcp.network: No valid settings found in the [Match] section, ignoring file. To match all interfaces, add Name=* in the [Match] section. peer1 # [6137386.304821] peer1 systemd-networkd[184]: /etc/systemd/network/99-wireless-client-dhcp.network: No valid settings found in the [Match] section, ignoring file. To match all interfaces, add Name=* in the [Match] section. peer1 # [6137386.304976] peer1 systemd-networkd[184]: lo: Link UP peer1 # [6137386.304980] peer1 systemd-networkd[184]: lo: Gained carrier peer1 # [6137386.305151] peer1 systemd-networkd[184]: eth1: Configuring with /etc/systemd/network/40-eth1.network. peer1 # [6137386.305511] peer1 systemd[1]: Started Network Management. peer1 # [6137386.348355] peer1 systemd-networkd[184]: eth1: Link UP peer1 # [6137386.348438] peer1 systemd[1]: Starting Enable Persistent Storage in systemd-networkd... peer1 # [6137386.348628] peer1 systemd-networkd[184]: eth1: Gained carrier peer1 # [6137386.402320] peer1 systemd[1]: Finished Enable Persistent Storage in systemd-networkd. peer1 # [6137386.449017] peer1 systemd-resolved[101]: Positive Trust Anchors: peer1 # [6137386.449028] peer1 systemd-resolved[101]: . IN DS 20326 8 2 e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d peer1 # [6137386.449032] peer1 systemd-resolved[101]: . IN DS 38696 8 2 683d2d0acb8c9b712a1948b27f741219298d0a450d612c483af444a4c0fb2b16 peer1 # [6137386.449068] peer1 systemd-resolved[101]: Negative trust anchors: home.arpa 10.in-addr.arpa 16.172.in-addr.arpa 17.172.in-addr.arpa 18.172.in-addr.arpa 19.172.in-addr.arpa 20.172.in-addr.arpa 21.172.in-addr.arpa 22.172.in-addr.arpa 23.172.in-addr.arpa 24.172.in-addr.arpa 25.172.in-addr.arpa 26.172.in-addr.arpa 27.172.in-addr.arpa 28.172.in-addr.arpa 29.172.in-addr.arpa 30.172.in-addr.arpa 31.172.in-addr.arpa 170.0.0.192.in-addr.arpa 171.0.0.192.in-addr.arpa 168.192.in-addr.arpa d.f.ip6.arpa ipv4only.arpa resolver.arpa corp home internal intranet lan local private test peer1 # [6137386.472164] peer1 systemd-resolved[101]: Using system hostname 'peer1'. peer1 # [6137386.473623] peer1 systemd[1]: Started Network Name Resolution. peer1 # [6137386.473703] peer1 systemd[1]: Reached target Network. peer1 # [6137386.473771] peer1 systemd[1]: Reached target System Initialization. peer1 # [6137386.473823] peer1 systemd[1]: Discard unused filesystem blocks once a week skipped, unmet condition check ConditionVirtualization=!container peer1 # [6137386.473854] peer1 systemd[1]: Started Daily Cleanup of Temporary Directories. peer1 # [6137386.473871] peer1 systemd[1]: Reached target Timer Units. peer1 # [6137386.474005] peer1 systemd[1]: Listening on D-Bus System Message Bus Socket. peer1 # [6137386.474139] peer1 systemd[1]: Listening on Nix Daemon Socket. peer1 # [6137386.474245] peer1 systemd[1]: Listening on Virtual Machine and Container Registration Service Socket. peer1 # [6137386.474270] peer1 systemd[1]: Reached target Socket Units. peer1 # [6137386.474310] peer1 systemd[1]: Reached target Basic System. peer1 # [6137386.475417] peer1 systemd[1]: Starting Import lastlog data into lastlog2 database... peer1 # [6137386.476358] peer1 systemd[1]: Starting Name Service Cache Daemon (nsncd)... peer1 # [6137386.477770] peer1 systemd[1]: Starting D-Bus System Message Bus... peer1 # [6137386.495136] peer1 systemd[1]: Finished Import lastlog data into lastlog2 database. admin1 # [6137385.745585] admin1 systemd[1]: Starting Flush Journal to Persistent Storage... admin1 # [6137385.746438] admin1 systemd[1]: Starting Network Name Resolution... admin1 # [6137385.747078] admin1 systemd[1]: Starting Create Static Device Nodes in /dev... admin1 # [6137385.755948] admin1 systemd-journald[69]: Time spent on flushing to /var/log/journal/98fa37e2dc204175bb4a404f3ad72213 is 1.773ms for 6 entries. admin1 # [6137385.755948] admin1 systemd-journald[69]: System Journal (/var/log/journal/98fa37e2dc204175bb4a404f3ad72213) is 8M, max 4G, 3.9G free. admin1 # [6137385.762836] admin1 systemd[1]: Finished Create Static Device Nodes in /dev. admin1 # [6137385.763389] admin1 systemd[1]: Reached target Preparation for Local File Systems. admin1 # [6137385.763495] admin1 systemd[1]: Reached target Local File Systems. admin1 # [6137385.764295] admin1 systemd[1]: Listening on Boot Loader Control Service Socket. admin1 # [6137385.764337] admin1 systemd[1]: Update Boot Loader Random Seed skipped, unmet condition check ConditionVirtualization=!container admin1 # [6137385.765099] admin1 systemd[1]: Starting Save Transient machine-id to Disk... admin1 # [6137385.765133] admin1 systemd[1]: Rule-based Manager for Device Events and Files skipped, unmet condition check ConditionPathIsReadWrite=/sys admin1 # [6137385.840435] admin1 systemd[1]: Finished Flush Journal to Persistent Storage. admin1 # [6137385.841589] admin1 systemd[1]: Starting Create System Files and Directories... admin1 # [6137385.888299] admin1 systemd[1]: Finished Firewall. admin1 # [6137385.888575] admin1 systemd[1]: Reached target Preparation for Network. admin1 # [6137385.888855] admin1 systemd[1]: Listening on Network Management Resolve Hook Socket. admin1 # [6137385.890036] admin1 systemd[1]: Starting Network Management... admin1 # [6137385.902314] admin1 systemd-tmpfiles[150]: Cannot set file attributes for '/var/empty', value=0x00000010, mask=0x00000010, ignoring: Operation not permitted admin1 # [6137385.902564] admin1 systemd-tmpfiles[150]: fchmod() of /var/log/journal failed: Operation not permitted admin1 # [6137385.902734] admin1 systemd-tmpfiles[150]: fchmod() of /var/log/journal/98fa37e2dc204175bb4a404f3ad72213 failed: Operation not permitted admin1 # [6137385.902997] admin1 systemd-tmpfiles[150]: fchmod() of /run/log/journal failed: Operation not permitted admin1 # [6137385.905329] admin1 systemd[1]: Finished Create System Files and Directories. admin1 # [6137385.907171] admin1 systemd[1]: Starting Rebuild Journal Catalog... admin1 # [6137385.908437] admin1 systemd[1]: Starting Record System Boot/Shutdown in UTMP... admin1 # [6137385.922561] admin1 systemd[1]: Finished Record System Boot/Shutdown in UTMP. admin1 # [6137385.928418] admin1 systemd[1]: Finished Rebuild Journal Catalog. admin1 # [6137385.929605] admin1 systemd[1]: Starting Update is Completed... admin1 # [6137385.940485] admin1 systemd[1]: Finished Update is Completed. admin1 # [6137386.287804] admin1 systemd-networkd[175]: Failed to increase receive buffer size for general netlink socket, ignoring: Operation not permitted admin1 # [6137386.287903] admin1 systemd-networkd[175]: Failed to increase receive buffer size for nftables netlink socket, ignoring: Operation not permitted admin1 # [6137386.295904] admin1 systemd-networkd[175]: /etc/systemd/network/99-ethernet-default-dhcp.network: No valid settings found in the [Match] section, ignoring file. To match all interfaces, add Name=* in the [Match] section. admin1 # [6137386.296228] admin1 systemd-networkd[175]: /etc/systemd/network/99-wireless-client-dhcp.network: No valid settings found in the [Match] section, ignoring file. To match all interfaces, add Name=* in the [Match] section. admin1 # [6137386.296412] admin1 systemd-networkd[175]: lo: Link UP admin1 # [6137386.296418] admin1 systemd-networkd[175]: lo: Gained carrier admin1 # [6137386.296603] admin1 systemd-networkd[175]: eth1: Configuring with /etc/systemd/network/40-eth1.network. admin1 # [6137386.297050] admin1 systemd[1]: Started Network Management. admin1 # [6137386.297155] admin1 systemd-networkd[175]: eth1: Link UP admin1 # [6137386.297460] admin1 systemd-networkd[175]: eth1: Gained carrier admin1 # [6137386.298184] admin1 systemd[1]: Starting Enable Persistent Storage in systemd-networkd... admin1 # [6137386.355649] admin1 systemd[1]: Finished Enable Persistent Storage in systemd-networkd. admin1 # [6137386.454564] admin1 systemd-resolved[94]: Positive Trust Anchors: admin1 # [6137386.454576] admin1 systemd-resolved[94]: . IN DS 20326 8 2 e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d admin1 # [6137386.454579] admin1 systemd-resolved[94]: . IN DS 38696 8 2 683d2d0acb8c9b712a1948b27f741219298d0a450d612c483af444a4c0fb2b16 admin1 # [6137386.454614] admin1 systemd-resolved[94]: Negative trust anchors: home.arpa 10.in-addr.arpa 16.172.in-addr.arpa 17.172.in-addr.arpa 18.172.in-addr.arpa 19.172.in-addr.arpa 20.172.in-addr.arpa 21.172.in-addr.arpa 22.172.in-addr.arpa 23.172.in-addr.arpa 24.172.in-addr.arpa 25.172.in-addr.arpa 26.172.in-addr.arpa 27.172.in-addr.arpa 28.172.in-addr.arpa 29.172.in-addr.arpa 30.172.in-addr.arpa 31.172.in-addr.arpa 170.0.0.192.in-addr.arpa 171.0.0.192.in-addr.arpa 168.192.in-addr.arpa d.f.ip6.arpa ipv4only.arpa resolver.arpa corp home internal intranet lan local private test admin1 # [6137386.476449] admin1 systemd-resolved[94]: Using system hostname 'admin1'. admin1 # [6137386.477812] admin1 systemd[1]: Started Network Name Resolution. admin1 # [6137386.477919] admin1 systemd[1]: Reached target Network. admin1 # [6137386.477993] admin1 systemd[1]: Reached target System Initialization. admin1 # [6137386.478053] admin1 systemd[1]: Discard unused filesystem blocks once a week skipped, unmet condition check ConditionVirtualization=!container admin1 # [6137386.478088] admin1 systemd[1]: Started Daily Cleanup of Temporary Directories. admin1 # [6137386.478115] admin1 systemd[1]: Reached target Timer Units. admin1 # [6137386.478268] admin1 systemd[1]: Listening on D-Bus System Message Bus Socket. admin1 # [6137386.478409] admin1 systemd[1]: Listening on Nix Daemon Socket. admin1 # [6137386.478540] admin1 systemd[1]: Listening on Virtual Machine and Container Registration Service Socket. admin1 # [6137386.478568] admin1 systemd[1]: Reached target Socket Units. admin1 # [6137386.478613] admin1 systemd[1]: Reached target Basic System. admin1 # [6137386.479820] admin1 systemd[1]: Starting Import lastlog data into lastlog2 database... admin1 # [6137386.480758] admin1 systemd[1]: Starting Name Service Cache Daemon (nsncd)... admin1 # [6137386.482103] admin1 systemd[1]: Starting D-Bus System Message Bus... admin1 # [6137386.500517] admin1 systemd[1]: Finished Import lastlog data into lastlog2 database. peer1 # [6137386.586135] peer1 systemd[1]: Started Name Service Cache Daemon (nsncd). peer1 # [6137386.586243] peer1 systemd[1]: Reached target Host and Network Name Lookups. peer1 # [6137386.586335] peer1 systemd[1]: Reached target User and Group Name Lookups. peer1 # [6137386.586388] peer1 nsncd[197]: Aug 19 00:13:32.639 INFO started, config: Config { ignored_request_types: {}, worker_count: 8, handoff_timeout: 10s }, path: "/var/run/nscd/socket" peer1 # [6137386.599856] peer1 systemd[1]: Starting User Login Management... peer1 # [6137386.601109] peer1 systemd[1]: Starting Permit User Sessions... peer1 # [6137386.610190] peer1 systemd[1]: Finished Permit User Sessions. peer1 # [6137386.611248] peer1 systemd[1]: Started Console Getty. peer1 # [6137386.611286] peer1 systemd[1]: Getty on tty1 skipped, unmet condition check ConditionPathExists=/dev/tty0 peer1 # [6137386.611302] peer1 systemd[1]: Reached target Login Prompts. peer1 # [6137386.676790] peer1 dbus-broker-launch[198]: Looking up NSS user entry for 'systemd-timesync'... peer1 # [6137386.677433] peer1 dbus-broker-launch[198]: NSS returned no entry for 'systemd-timesync' peer1 # [6137386.677433] peer1 dbus-broker-launch[198]: Invalid user-name in /nix/store/f22qhc8ziywvxq9q588a7r0mcbjxv1bk-system-path/share/dbus-1/system.d/org.freedesktop.timesync1.conf +16: user="systemd-timesync" peer1 # [6137386.677812] peer1 systemd[1]: Started D-Bus System Message Bus. peer1 # [6137386.686380] peer1 dbus-broker-launch[198]: Ready admin1 # [6137386.585072] admin1 nsncd[188]: Aug 19 00:13:32.638 INFO started, config: Config { ignored_request_types: {}, worker_count: 8, handoff_timeout: 10s }, path: "/var/run/nscd/socket" admin1 # [6137386.585080] admin1 systemd[1]: Started Name Service Cache Daemon (nsncd). admin1 # [6137386.585145] admin1 systemd[1]: Reached target Host and Network Name Lookups. admin1 # [6137386.585203] admin1 systemd[1]: Reached target User and Group Name Lookups. admin1 # [6137386.599364] admin1 systemd[1]: Starting User Login Management... admin1 # [6137386.600248] admin1 systemd[1]: Starting Permit User Sessions... admin1 # [6137386.610853] admin1 systemd[1]: Finished Permit User Sessions. admin1 # [6137386.612467] admin1 systemd[1]: Started Console Getty. admin1 # [6137386.612541] admin1 systemd[1]: Getty on tty1 skipped, unmet condition check ConditionPathExists=/dev/tty0 admin1 # [6137386.612581] admin1 systemd[1]: Reached target Login Prompts. admin1 # [6137386.669388] admin1 dbus-broker-launch[189]: Looking up NSS user entry for 'systemd-timesync'... admin1 # [6137386.670230] admin1 dbus-broker-launch[189]: NSS returned no entry for 'systemd-timesync' admin1 # [6137386.670230] admin1 dbus-broker-launch[189]: Invalid user-name in /nix/store/f22qhc8ziywvxq9q588a7r0mcbjxv1bk-system-path/share/dbus-1/system.d/org.freedesktop.timesync1.conf +16: user="systemd-timesync" admin1 # [6137386.670785] admin1 systemd[1]: Started D-Bus System Message Bus. admin1 # [6137386.678672] admin1 dbus-broker-launch[189]: Ready peer1 # [6137387.035519] peer1 systemd-logind[213]: New seat seat0. peer1 # [6137387.035695] peer1 systemd[1]: Started User Login Management. peer1 # [6137387.036826] peer1 systemd[1]: Starting linger-users.service... peer1 # [6137387.168513] peer1 systemd[1]: linger-users.service: Deactivated successfully. peer1 # [6137387.168840] peer1 systemd[1]: Finished linger-users.service. peer1 # [6137387.169731] peer1 systemd[1]: Reached target Multi-User System. admin1 # [6137387.035521] admin1 systemd-logind[204]: New seat seat0. admin1 # [6137387.035658] admin1 systemd[1]: Started User Login Management. admin1 # [6137387.036855] admin1 systemd[1]: Starting linger-users.service... admin1 # [6137387.169490] admin1 systemd[1]: linger-users.service: Deactivated successfully. admin1 # [6137387.169564] admin1 systemd[1]: Finished linger-users.service. admin1 # [6137387.169965] admin1 systemd[1]: Reached target Multi-User System. admin1 # [6137387.620231] admin1 systemd-networkd[175]: eth1: Gained IPv6LL peer1 # [6137387.908146] peer1 systemd-networkd[184]: eth1: Gained IPv6LL admin1: still waiting for container 'admin1' to reach ready state... admin1: still waiting for container 'admin1' to reach ready state... admin1: (finished: waiting for unit multi-user.target, in 23.66 seconds) peer1: waiting for unit multi-user.target peer1: (finished: waiting for unit multi-user.target, in 0.02 seconds) peer1: must succeed: cat /nix/store/z61c0lalzvfahapklpif5sc0cd4x5g4b-per-machine-peer1-new-service_not-a-secret peer1: (finished: must succeed: cat /nix/store/z61c0lalzvfahapklpif5sc0cd4x5g4b-per-machine-peer1-new-service_not-a-secret, in 0.01 seconds) peer1: must succeed: ls -la /run/secrets/per-machine/peer1/new-service/a-secret peer1: (finished: must succeed: ls -la /run/secrets/per-machine/peer1/new-service/a-secret, in 0.01 seconds) peer1 # [6137408.087052] peer1 systemd[1]: etc-machine\x2did.mount: Deactivated successfully. peer1 # [6137408.089410] peer1 systemd[1]: Finished Save Transient machine-id to Disk. peer1 # [6137408.089909] peer1 systemd[1]: Startup finished in 22.994s. admin1 # [6137408.087296] admin1 systemd[1]: etc-machine\x2did.mount: Deactivated successfully. admin1 # [6137408.089442] admin1 systemd[1]: Finished Save Transient machine-id to Disk. admin1 # [6137408.089911] admin1 systemd[1]: Startup finished in 23.020s. admin1 peer1 (finished: run the VM test script, in 30.27 seconds) test script finished in 32.99s cleanup kill NspawnMachine (pid 52) kill NspawnMachine (pid 53) Container admin1 terminated by signal KILL. (finished: cleanup, in 0.38 seconds) Container peer1 terminated by signal KILL.