Example of lxc-execute failure due to "lxc-execute: Failed to find an lxc-init"

example-lxc-execute-failure.txt

$ cat seccomp.sh 
#! /usr/bin/env bash

cat << EOF > /tmp/config
lxc.seccomp = /tmp/whitelist
EOF
cat << EOF > /tmp/whitelist
1
whitelist
1
EOF

# this works-ish!
cmd="sudo lxc-execute -n echotest -l DEBUG -o /tmp/lxc.log -- cat /etc/hostname"

echo
echo "Executing lxc instance with command: ${cmd}"
echo `${cmd}`

echo
echo "Debug output:"
cat /tmp/lxc.log
echo

# this fails!
cmd="sudo lxc-execute -n echotest -f /tmp/config -l DEBUG -o /tmp/lxc.log -- cat /etc/hostname"

echo
echo "Executing lxc instance with command: ${cmd}"
echo `${cmd}`

echo
echo "Debug output:"
cat /tmp/lxc.log
echo

# cleanup
rm -f /tmp/config
rm -f /tmp/whitelist
sudo rm -f /tmp/lxc.log

$ ./seccomp.sh 

Executing lxc instance with command: sudo lxc-execute -n echotest -l DEBUG -o /tmp/lxc.log -- cat /etc/hostname
yama

Debug output:
    lxc-execute 1391684521.503 INFO     lxc_lsm - LSM security driver nop
    lxc-execute 1391684521.503 DEBUG    lxc_start - sigchild handler set
    lxc-execute 1391684521.503 INFO     lxc_console - no console for lxc-execute.
    lxc-execute 1391684521.503 INFO     lxc_start - 'echotest' is initialized
    lxc-execute 1391684521.509 DEBUG    lxc_start - Not dropping cap_sys_boot or watching utmp

    lxc-execute 1391684521.512 DEBUG    lxc_conf - Set exec command to cat

    lxc-execute 1391684521.512 DEBUG    lxc_conf - capabilities have been setup
    lxc-execute 1391684521.512 NOTICE   lxc_conf - 'echotest' is setup.
    lxc-execute 1391684521.512 NOTICE   lxc_execute - exec'ing 'cat'
    lxc-execute 1391684521.514 NOTICE   lxc_execute - 'cat' started with pid '5257'
    lxc-execute 1391684521.514 INFO     lxc_console - no console for lxc-execute.
    lxc-execute 1391684521.514 WARN     lxc_start - invalid pid for SIGCHLD
    lxc-execute 1391684521.519 DEBUG    lxc_start - container init process exited
    lxc-execute 1391684521.519 INFO     lxc_conf - running to reset 0 nic names


Executing lxc instance with command: sudo lxc-execute -n echotest -f /tmp/config -l DEBUG -o /tmp/lxc.log -- cat /etc/hostname
lxc-execute: Failed to find an lxc-init
lxc-execute: invalid sequence number 1. expected 4
lxc-execute: failed to spawn 'echotest'


Debug output:
    lxc-execute 1391684521.503 INFO     lxc_lsm - LSM security driver nop
    lxc-execute 1391684521.503 DEBUG    lxc_start - sigchild handler set
    lxc-execute 1391684521.503 INFO     lxc_console - no console for lxc-execute.
    lxc-execute 1391684521.503 INFO     lxc_start - 'echotest' is initialized
    lxc-execute 1391684521.509 DEBUG    lxc_start - Not dropping cap_sys_boot or watching utmp

    lxc-execute 1391684521.512 DEBUG    lxc_conf - Set exec command to cat

    lxc-execute 1391684521.512 DEBUG    lxc_conf - capabilities have been setup
    lxc-execute 1391684521.512 NOTICE   lxc_conf - 'echotest' is setup.
    lxc-execute 1391684521.512 NOTICE   lxc_execute - exec'ing 'cat'
    lxc-execute 1391684521.514 NOTICE   lxc_execute - 'cat' started with pid '5257'
    lxc-execute 1391684521.514 INFO     lxc_console - no console for lxc-execute.
    lxc-execute 1391684521.514 WARN     lxc_start - invalid pid for SIGCHLD
    lxc-execute 1391684521.519 DEBUG    lxc_start - container init process exited
    lxc-execute 1391684521.519 INFO     lxc_conf - running to reset 0 nic names
    lxc-execute 1391684521.528 INFO     lxc_lsm - LSM security driver nop
    lxc-execute 1391684521.528 DEBUG    lxc_start - sigchild handler set
    lxc-execute 1391684521.528 INFO     lxc_console - no console for lxc-execute.
    lxc-execute 1391684521.528 INFO     lxc_start - 'echotest' is initialized
    lxc-execute 1391684521.530 DEBUG    lxc_start - Not dropping cap_sys_boot or watching utmp

    lxc-execute 1391684521.597 DEBUG    lxc_conf - Set exec command to cat

    lxc-execute 1391684521.597 DEBUG    lxc_conf - capabilities have been setup
    lxc-execute 1391684521.597 NOTICE   lxc_conf - 'echotest' is setup.
    lxc-execute 1391684521.597 ERROR    lxc_execute - Failed to find an lxc-init
    lxc-execute 1391684521.597 ERROR    lxc_sync - invalid sequence number 1. expected 4
    lxc-execute 1391684521.597 ERROR    lxc_start - failed to spawn 'echotest'