[Bug 1251352] Re: lxc fails to start on boot but succeeds with a manual boot

[Serge Hallyn]

** Description changed:

+ =========================================
+ SRU Justification
+ 1. Impact: containers are autostarted with bad (duplicate) configuration, and/or may fail
+ 2. Devel fix: don't load the original configuration if a custom configuration file is specified
+ 3. Stable fix: same as devel fix
+ 4. Test case:
+         sudo lxc-create -t ubuntu -n xxx
+         echo "lxc.network.name = eth0" | sudo tee -a /var/lib/lxc/xxx/config
+         cp /var/lib/lxc/xxx/config /tmp
+         sudo lxc-start -n xxx -f /tmp/config
+     This will fail without the fix.
+ 5. Regression potential: there should be no regressions, as we simply avoid loading the container's stock configuration file if an alternate configuration file is specified.
+ =========================================
  
  root at cps2-c1:/var/log/upstart# cat lxc.log
  lxc-instance (os-api-cps2) start/running, process 2880
  
  root at cps2-c1:/var/log/upstart# tail -f lxc-instance-os-api-cps2.log
  lxc-start: failed to rename veth3ITMNG->eth0 : File exists
  lxc-start: failed to setup netdev
  lxc-start: failed to setup the network for 'os-api-cps2'
  lxc-start: failed to setup the container
  lxc-start: invalid sequence number 1. expected 2
  lxc-start: failed to spawn 'os-api-cps2'
  
  root at cps2-c1:/var/log/upstart# cat network-interface-veth3ITMNG.log 
  ifdown: interface veth3ITMNG not configured
  
  root at cps2-c1:/var/log/upstart# cat /etc/lxc/auto/os-api-cps2 
  # Template used to create this container: ubuntu
  # Template script checksum (SHA-1): 6f468a9a658112f6420fb39d2ab90a80fd43cd22
  
  lxc.network.type = veth
  lxc.network.flags = up
  lxc.network.link = br18
  lxc.network.name = eth0
  lxc.network.hwaddr = 00:16:3e:00:02:68
  lxc.network.ipv6 = **********
  lxc.network.mtu = 9000
  
  lxc.rootfs = /var/lib/lxc/os-api-cps2/rootfs
  lxc.mount = /var/lib/lxc/os-api-cps2/fstab
  lxc.pivotdir = lxc_putold
  
  lxc.devttydir = lxc
  lxc.tty = 4
  lxc.pts = 1024
  
  lxc.utsname = os-api-cps2
  lxc.arch = amd64
  lxc.cap.drop = sys_module mac_admin mac_override
  
  # When using LXC with apparmor, uncomment the next line to run unconfined:
  #lxc.aa_profile = unconfined
  
  lxc.cgroup.devices.deny = a
  # Allow any mknod (but not using the node)
  lxc.cgroup.devices.allow = c *:* m
  lxc.cgroup.devices.allow = b *:* m
  # /dev/null and zero
  lxc.cgroup.devices.allow = c 1:3 rwm
  lxc.cgroup.devices.allow = c 1:5 rwm
  # consoles
  lxc.cgroup.devices.allow = c 5:1 rwm
  lxc.cgroup.devices.allow = c 5:0 rwm
  #lxc.cgroup.devices.allow = c 4:0 rwm
  #lxc.cgroup.devices.allow = c 4:1 rwm
  # /dev/{,u}random
  lxc.cgroup.devices.allow = c 1:9 rwm
  lxc.cgroup.devices.allow = c 1:8 rwm
  lxc.cgroup.devices.allow = c 136:* rwm
  lxc.cgroup.devices.allow = c 5:2 rwm
  # rtc
  lxc.cgroup.devices.allow = c 254:0 rwm
  #fuse
  lxc.cgroup.devices.allow = c 10:229 rwm
  #tun
  lxc.cgroup.devices.allow = c 10:200 rwm
  #full
  lxc.cgroup.devices.allow = c 1:7 rwm
  #hpet
  lxc.cgroup.devices.allow = c 10:228 rwm
  #kvm
  lxc.cgroup.devices.allow = c 10:232 rwm
  
  
  Running "service lxc restart" results in the same errors.
  
  Running "lxc-start -d -n os-api-cps2" from the command line successfully
  starts the instance.
  
  root at cps2-c1:/var/log/upstart# dpkg -l | grep lxc
  ii  liblxc0                             1.0.0~alpha1-0ubuntu13           amd64        Linux Containers userspace tools (library)
  ii  lxc                                 1.0.0~alpha1-0ubuntu13           amd64        Linux Containers userspace tools
  ii  lxc-templates                       1.0.0~alpha1-0ubuntu13           all          Linux Containers userspace tools (templates)
  ii  lxctl                               0.3.1+debian-3                   all          Utility to manage LXC
  ii  python3-lxc                         1.0.0~alpha1-0ubuntu13           amd64        Linux Containers userspace tools (Python 3.x bindings)

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https://bugs.launchpad.net/bugs/1251352

Title:
  lxc fails to start on boot but succeeds with a manual boot

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