TODO centos: support centos 7

Caveat: I needed add an ifup call to the install-extras script,
because without it, the container wouldn't start the dhcp client
on the network. This fix feels wrong but seems to give at least
some improvement.

special config for centos 7 - for systemd...

Makefile

@@ -1,6 +1,6 @@
 UBUNTU_BOXES= precise quantal raring saucy trusty utopic vivid
 DEBIAN_BOXES= squeeze wheezy sid jessie
-CENTOS_BOXES= 6
+CENTOS_BOXES= 6 7
 FEDORA_BOXES= rawhide 23 22 21 20 19
 TODAY=$(shell date -u +"%Y-%m-%d")
 

centos/install-extras.sh

@@ -9,6 +9,9 @@ info 'Installing extra packages and upgrading'
 debug 'Bringing container up'
 utils.lxc.start
 
+# how to get that network up?...
+utils.lxc.attach ifup eth0
+
 # Sleep for a bit so that the container can get an IP
 SECS=20
 log "Sleeping for $SECS seconds..."

common/download.sh

@@ -52,13 +52,15 @@ else
 fi
 
 if [ ${DISTRIBUTION} = 'fedora' -o \
-     ${DISTRIBUTION} = 'debian' -a ${RELEASE} = 'jessie' ]
+     ${DISTRIBUTION} = 'debian' -a ${RELEASE} = 'jessie' -o \
+     ${DISTRIBUTION} = 'centos' -a ${RELEASE} = '7' ]
 then
   # Improve systemd support:
   # - The fedora template does it but the fedora images from the download
   #   template apparently don't.
   # - The debian template does it but the debian image from the download
   #   template apparently not.
+  # - For centos, there there is no support in either template yet.
   utils.lxc.stop
   echo  >> /var/lib/lxc/${CONTAINER}/config
   echo "# settings for systemd with PID 1:" >> /var/lib/lxc/${CONTAINER}/config

conf/centos-7

@@ -0,0 +1,55 @@
+# support systemd as PID 1:
+lxc.autodev = 1
+lxc.kmsg = 0
+
+# Taken from the oracle.common.conf.in
+# Console settings
+
+lxc.devttydir = lxc
+lxc.tty = 4
+lxc.pts = 1024
+
+# Mount entries
+lxc.mount.auto = proc:mixed sys:ro
+
+# Ensure hostname is changed on clone
+lxc.hook.clone = /usr/share/lxc/hooks/clonehostname
+
+# Capabilities
+# Uncomment these if you don't run anything that needs the capability, and
+# would like the container to run with less privilege.
+#
+# Dropping sys_admin disables container root from doing a lot of things
+# that could be bad like re-mounting lxc fstab entries rw for example,
+# but also disables some useful things like being able to nfs mount, and
+# things that are already namespaced with ns_capable() kernel checks, like
+# hostname(1).
+# lxc.cap.drop = sys_admin
+# lxc.cap.drop = net_raw          # breaks dhcp/ping
+# lxc.cap.drop = setgid           # breaks login (initgroups/setgroups)
+# lxc.cap.drop = dac_read_search  # breaks login (pam unix_chkpwd)
+# lxc.cap.drop = setuid           # breaks sshd,nfs statd
+# lxc.cap.drop = audit_control    # breaks sshd (set_loginuid failed)
+# lxc.cap.drop = audit_write
+#
+lxc.cap.drop = mac_admin mac_override setfcap setpcap
+lxc.cap.drop = sys_module sys_nice sys_pacct
+lxc.cap.drop = sys_rawio sys_time
+
+# Control Group devices: all denied except those whitelisted
+lxc.cgroup.devices.deny = a
+# Allow any mknod (but not reading/writing the node)
+lxc.cgroup.devices.allow = c *:* m
+lxc.cgroup.devices.allow = b *:* m
+lxc.cgroup.devices.allow = c 1:3 rwm	# /dev/null
+lxc.cgroup.devices.allow = c 1:5 rwm	# /dev/zero
+lxc.cgroup.devices.allow = c 1:7 rwm	# /dev/full
+lxc.cgroup.devices.allow = c 5:0 rwm	# /dev/tty
+lxc.cgroup.devices.allow = c 1:8 rwm	# /dev/random
+lxc.cgroup.devices.allow = c 1:9 rwm	# /dev/urandom
+lxc.cgroup.devices.allow = c 136:* rwm	# /dev/tty[1-4] ptys and lxc console
+lxc.cgroup.devices.allow = c 5:2 rwm	# /dev/ptmx pty master
+
+# Blacklist some syscalls which are not safe in privileged
+# containers
+lxc.seccomp = /usr/share/lxc/config/common.seccomp