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Add check for RHEL7/CentOS7 experimental userns disabled

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Add a check in `check-config.sh` to see if we are running on a RHEL7 or
CentOS7 system, which may report that CONFIG_USERNS is OK/enabled, but
user namespaces still won't work because of the experimental feature
flag added by Redhat.

This will add a warning if it is actually disabled and notes what has to
be added to the grub/boot command line to enable it.

Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com> (github: estesp)
This commit is contained in:
Phil Estes 2016-02-23 23:28:24 -06:00
parent 2ed1806b2c
commit 2355151556
1 changed files with 12 additions and 0 deletions
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12
contrib/check-config.sh
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@ -115,6 +115,17 @@ check_device() {
fi
}
check_distro_userns() {
source /etc/os-release 2>/dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
@ -185,6 +196,7 @@ echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP