fix: check ipv6 requirement before start

(cherry picked from commit 5b973a8)
kubeovn · Nov 25, 2020 · cf4c412 · cf4c412
1 parent 186d90c
commit cf4c412
Show file tree

Hide file tree

Showing 3 changed files with 34 additions and 0 deletions.
diff --git a/dist/images/start-db.sh b/dist/images/start-db.sh
@@ -1,6 +1,25 @@
 #!/bin/bash
 set -eo pipefail
 
+# https://bugs.launchpad.net/neutron/+bug/1776778
+if grep -q "3.10.0-862" /proc/version
+then
+    echo "kernel version 3.10.0-862 has a nat related bug that will affect ovs function, please update to a version greater than 3.10.0-898"
+    exit 1
+fi
+
+# https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794232
+if [ ! -f "/proc/net/if_inet6" ] && grep -q "3.10" /proc/version ; then
+    echo "geneve requires ipv6, please add ipv6.disable=0 to kernel follow the instruction below:"
+    echo "
+vi /etc/default/grub
+find GRUB_CMDLINE_LINUX=  and change ipv6.disable=1 to ipv6.disable=0
+grub2-mkconfig -o /boot/grub2/grub.cfg
+reboot
+cat /proc/cmdline"
+    exit 1
+fi
+
 DB_NB_ADDR=${DB_NB_ADDR:-::}
 DB_NB_PORT=${DB_NB_PORT:-6641}
 DB_SB_ADDR=${DB_SB_ADDR:-::}

diff --git a/dist/images/start-ovs.sh b/dist/images/start-ovs.sh
@@ -3,13 +3,26 @@ set -euo pipefail
 
 HW_OFFLOAD=${HW_OFFLOAD:-false}
 ENABLE_SSL=${ENABLE_SSL:-false}
+
 # https://bugs.launchpad.net/neutron/+bug/1776778
 if grep -q "3.10.0-862" /proc/version
 then
     echo "kernel version 3.10.0-862 has a nat related bug that will affect ovs function, please update to a version greater than 3.10.0-898"
     exit 1
 fi
 
+# https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794232
+if [ ! -f "/proc/net/if_inet6" ] && grep -q "3.10" /proc/version ; then
+    echo "geneve requires ipv6, please add ipv6.disable=0 to kernel follow the instruction below:"
+    echo "
+vi /etc/default/grub
+find GRUB_CMDLINE_LINUX=  and change ipv6.disable=1 to ipv6.disable=0
+grub2-mkconfig -o /boot/grub2/grub.cfg
+reboot
+cat /proc/cmdline"
+    exit 1
+fi
+
 # wait for ovn-sb ready
 function wait_ovn_sb {
     if [[ -z "${OVN_SB_SERVICE_HOST}" ]]; then

diff --git a/docs/install.md b/docs/install.md
@@ -8,10 +8,12 @@ Kube-OVN includes two parts:
 - Kubernetes >= 1.11
 - Docker >= 1.12.6
 - OS: CentOS 7.5/7.6/7.7, Ubuntu 16.04/18.04
+- Kernel boot with `ipv6.disable=0`
 
 *NOTE*
 1. Ubuntu 16.04 users should build the related ovs-2.11.1 kernel module to replace the kernel built-in module
 2. CentOS users should make sure kernel version is greater than 3.10.0-898 to avoid a kernel conntrack bug, see [here](https://bugs.launchpad.net/neutron/+bug/1776778)
+3. Kernel must boot with ipv6 enabled, otherwise geneve tunnel will not be established due to a kernel bug, see [here](https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794232)
 
 ## To Install