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Option for MetalLB to talk BGP (#6383)

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* Option for MetalLB to talk BGP

* Check for BGP peers when metallb_protocol is bgp

* README clarification

* Commented values as documentation only in the sample inventory

* layer 2 or BGP, not both
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Mike Williams 2020-08-05 09:52:40 +01:00 committed by GitHub
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8
inventory/sample/group_vars/k8s-cluster/addons.yml
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@ -135,3 +135,11 @@ metallb_enabled: false
# - "10.5.1.50-10.5.1.99"
# protocol: "layer2"
# auto_assign: false
# metallb_protocol: "bgp"
# metallb_peers:
# - peer_address: 192.0.2.1
# peer_asn: 64512
# my_asn: 4200000000
# - peer_address: 192.0.2.2
# peer_asn: 64513
# my_asn: 4200000000

10
roles/kubernetes-apps/metallb/README.md
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@ -3,13 +3,15 @@
MetalLB hooks into your Kubernetes cluster, and provides a network load-balancer implementation.
In short, it allows you to create Kubernetes services of type "LoadBalancer" in clusters that
don't run on a cloud provider, and thus cannot simply hook into paid products to provide load-balancers.
This addon aims to automate [this](https://metallb.universe.tf/concepts/layer2/).
It deploys MetalLB into Kubernetes and sets up a layer 2 load-balancer.
This addon aims to automate [MetalLB in layer 2 mode](https://metallb.universe.tf/concepts/layer2/)
or [MetalLB in BGP mode][https://metallb.universe.tf/concepts/bgp/].
It deploys MetalLB into Kubernetes and sets up a layer 2 or BGP load-balancer.
## Install
In the default, MetalLB is not deployed into your Kubernetes cluster.
You can override the defaults by copying the contents of this file to somewhere in inventory/mycluster/group_vars
such as inventory/mycluster/groups_vars/k8s-cluster/addons.yml and updating metallb_enabled option to `true`.
You can override the defaults by copying the contents of roles/kubernetes-apps/metallb/defaults/main.yml
to somewhere in inventory/mycluster/group_vars such as inventory/mycluster/groups_vars/k8s-cluster/addons.yml
and updating metallb_enabled option to `true`.
In addition you need to update metallb_ip_range option on the addons.yml at least for suiting your network
environment, because MetalLB allocates external IP addresses from this metallb_ip_range option.

6
roles/kubernetes-apps/metallb/tasks/main.yml
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@ -11,6 +11,12 @@
when:
- metallb_ip_range is not defined or not metallb_ip_range
- name: Kubernetes Apps | Check BGP peers for MetalLB
fail:
msg: "metallb_peers is mandatory when metallb_protocol is bgp"
when:
- metallb_protocol == 'bgp' and metallb_peers is not defined
- name: Kubernetes Apps | Check AppArmor status
command: which apparmor_parser
register: apparmor_status

8
roles/kubernetes-apps/metallb/templates/metallb-config.yml.j2
View file

@ -6,6 +6,14 @@ metadata:
name: config
data:
config: |
{% if metallb_protocol == 'bgp' %}
peers:
{% for peer in metallb_peers %}
- peer-address: {{ peer.peer_address }}
peer-asn: {{ peer.peer_asn }}
my-asn: {{ peer.my_asn }}
{% endfor %}
{% endif %}
address-pools:
- name: loadbalanced
protocol: {{ metallb_protocol }}