The software described in this documentation is either no longer supported or is in extended support.
Oracle recommends that you upgrade to a current supported release.
Chapter 5 Known Issues
This chapter contains information about known issues and limitations in this release.
5.1 Upgrading Kubernetes 1.12 to Oracle Cloud Native Environment
You cannot upgrade from Kubernetes 1.12 or earlier and add the cluster to Oracle Cloud Native Environment. You must perform a new deployment of Kubernetes using the Platform CLI.
5.2 Disabled virt module on Oracle Linux 8
After deploying the Kubernetes module on Oracle Linux 8, the
virt module is disabled in the operating
system. It is recommended that you do not enable this module again
unless requested to do so in this documentation or by Oracle
Support.
5.3 Errors using overlay networking
A Kubernetes cluster that uses overlay networking, may result in an issue with the VxLAN configuration for the cluster. Nodes that are affected by the issue display errors similar to the following in the dmesg output:
[ 610.495450] bnxt_en 0000:00:03.0 ens3: hwrm req_type 0xa1 seq id 0x67 error 0xf [ 610.498246] bnxt_en 0000:00:03.0 ens3: hwrm_tunnel_dst_port_alloc failed. rc:15
This issue is commonly caused when the tx
offload feature is enabled in the
bnxt_en driver module. You can resolve this
issue by disabling the tx offload feature using
the ethtool command. For example:
sudo ethtool --offload $(ip -o -4 route show to default | awk '{print $5}') tx off
5.4 Listing environments
The Platform CLI does not yet have a method to display a list of the environments created.
5.5 Validating a module reports network ports are not open
If you open network ports on nodes using the range option, the olcnectl module validate command cannot validate the ports are open. This is due to an issue in the firewall-cmd command. For example, if you use a command like the following which opens ports using a port range:
sudo firewall-cmd --add-port=2379-2380/tcp sudo firewall-cmd --add-port=2379-2380/tcp --permanent
The olcnectl module validate command reports that ports 2379 and 2380 are not open.
Workaround: Open network ports individually, without specifying a port range. For example:
sudo firewall-cmd --add-port=2379/tcp sudo firewall-cmd --add-port=2379/tcp --permanent sudo firewall-cmd --add-port=2380/tcp sudo firewall-cmd --add-port=2380/tcp --permanent