Description

it is a generic overlay network that can be used as a simple alternative
to existing software defined networking solutions

Flannel Charm

Flannel is a virtual network that gives a subnet to each host for use with
container runtimes.

This charm will deploy flannel as a background service, and configure CNI for
use with flannel, on any principal charm that implements the
kubernetes-cni interface.

Usage

The flannel charm is a
subordinate.
This charm will require a principal charm that implements the kubernetes-cni
interface in order to properly deploy.

juju deploy flannel
juju deploy etcd
juju deploy kubernetes-master
juju deploy kubernetes-worker
juju add-relation flannel etcd
juju add-relation flannel kubernetes-master
juju add-relation flannel kubernetes-worker

Configuration

iface The interface to configure the flannel SDN binding. If this value is
empty string or undefined the code will attempt to find the default network
adapter similar to the following command:

route | grep default | head -n 1 | awk {'print $8'}

cidr The network range to configure the flannel SDN to declare when
establishing networking setup with etcd. Ensure this network range is not active
on the vlan you're deploying to, as it will cause collisions and odd behavior
if care is not taken when selecting a good CIDR range to assign to flannel.

nagios_context A string that will be prepended to instance name to set the
host name in nagios.If you're running multiple environments with the same
services in them this allows you to differentiate between them. Used by the
nrpe subordinate charm.

nagios_servicegroups The comma-separated list of servicegroups that the
generated Nagios checks will belong to.

Known Limitations

This subordinate does not support being co-located with other deployments of
the flannel subordinate (to gain 2 vlans on a single application). If you
require this support please file a bug.

This subordinate also leverages juju-resources, so it is currently only available
on juju 2.0+ controllers.

Further information

Configuration

nagios_context
(string) Used by the nrpe subordinate charms. A string that will be prepended to instance name to set the host name in nagios. So for instance the hostname would be something like: juju-myservice-0 If you're running multiple environments with the same services in them this allows you to differentiate between them.
juju
cidr
(string) Network CIDR to assign to Flannel
10.1.0.0/16
iface
(string) The interface to bind flannel overlay networking. The default value is the result of running the following command: `route | grep default | head -n 1 | awk {'print $8'}`.
nagios_servicegroups
(string) A comma-separated list of nagios servicegroups. If left empty, the nagios_context will be used as the servicegroup