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Merge pull request #361 from bogdando/issue/26_p2 

Add HA/LB endpoints for kube-apiserver
pull/374/head
Antoine Legrand 2016-07-21 14:43:53 +02:00 committed by GitHub
parent 0f246bfba4 a70c3b661e
commit 296eccd238
8 changed files with 104 additions and 37 deletions
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77
inventory/group_vars/all.yml
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@ -53,7 +53,7 @@ cluster_name: cluster.local
# Service endpoints. May be a VIP or a load balanced frontend IP, like one
# that a HAProxy or Nginx provides, or just a local service endpoint.
#
# Etcd endpoints use a local etcd-proxies to reach the etcd cluster via
# auto-evaluated endpoints. Those will reuse the access_ip for etcd cluster,
# if specified, or defer to the localhost:2379 as well.
@ -64,15 +64,64 @@ cluster_name: cluster.local
# This may be the case if clients support and loadbalance multiple etcd servers natively.
etcd_multiaccess: false
#
# TODO apiserver localhost:8080 and localhost:443 endpoints for kubelets and
# (hyper)kube-* and networking components.
# The port the API Server will be listening on.
kube_apiserver_port: 443 # (https)
kube_apiserver_insecure_port: 8080 # (http)
# For multi masters architecture:
# kube-proxy doesn't support multiple apiservers for the time being so you'll need to configure your own loadbalancer
# This domain name will be inserted into the /etc/hosts file of all servers
# configuration example with haproxy:
# listen kubernetes-apiserver-https
# bind 10.99.0.21:8383
# option ssl-hello-chk
# mode tcp
# timeout client 3h
# timeout server 3h
# server master1 10.99.0.26:443
# server master2 10.99.0.27:443
# balance roundrobin
# And the corresponding example config vars:
# apiserver_loadbalancer_domain_name: "lb-apiserver.kubernetes.local"
# loadbalancer_apiserver:
# adress: 10.99.0.21
# port: 8383
# For internal only multi-masters architecture:
# Assume there is no loadbalancers configured for internal access. Enable this flag,
# if a loadbalancer listens the localhost, which may be the case when there is neither
# loadbalancer_apiserver nor access_ip is configured, or you want to override both.
loadbalancer_apiserver_localhost: false
# The internal kube-apiserver endpoints:
# The secure endpoint is auto-evaluated. If loadbalancer_apiserver_localhost=true,
# it uses the localhost:kube_apiserver_port. Otherwise, it uses the external
# apiserver_loadbalancer_domain_name:loadbalancer_apiserver.port. Or defers to the
# access_ip:kube_apiserver_port, then ip, then default ansible ip.
# The insecure endpoint ignores the apiserver_loadbalancer_domain_name and access_ip.
# By default, it is a localhost:kube_apiserver_insecure_port.
# If loadbalancer_apiserver_localhost, it defers to ip, then default ansible ip.
# Apiserver access modes:
# Configure clients to access all of the apiservers directly as the
# "http(s)://hostX:port, http(s)://hostY:port, ..." and ignore the loadbalancers, if any.
# This may be the case, if clients support and loadbalance multiple apiservers or
# when there is no loadbalancers configured.
kube_apiserver_multiaccess: true
# Define connections security for kube controllers, schedulers and proxies
kube_proxy_insecure: true
kube_controller_insecure: true
kube_scheduler_insecure: true
# Choose network plugin (calico, weave or flannel)
kube_network_plugin: flannel
# Kubernetes internal network for services, unused block of space.
kube_service_addresses: 10.233.0.0/18
kube_apiserver_ip: "{{ kube_service_addresses|ipaddr('net')|ipaddr(1)|ipaddr('address') }}"
# internal network. When used, it will assign IP
# addresses from this range to individual pods.
@ -93,11 +142,6 @@ peer_with_router: false
# Warning : enabling router peering will disable calico's default behavior ('node mesh').
# The subnets of each nodes will be distributed by the datacenter router
# The port the API Server will be listening on.
kube_apiserver_ip: "{{ kube_service_addresses|ipaddr('net')|ipaddr(1)|ipaddr('address') }}"
kube_apiserver_port: 443 # (https)
kube_apiserver_insecure_port: 8080 # (http)
# Internal DNS configuration.
# Kubernetes can create and mainatain its own DNS server to resolve service names
# into appropriate IP addresses. It's highly advisable to run such DNS server,
@ -126,21 +170,6 @@ dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address')
# like you would do when using nova-client before starting the playbook.
# cloud_provider:
# For multi masters architecture:
# kube-proxy doesn't support multiple apiservers for the time being so you'll need to configure your own loadbalancer
# This domain name will be inserted into the /etc/hosts file of all servers
# configuration example with haproxy :
# listen kubernetes-apiserver-https
# bind 10.99.0.21:8383
# option ssl-hello-chk
# mode tcp
# timeout client 3h
# timeout server 3h
# server master1 10.99.0.26:443
# server master2 10.99.0.27:443
# balance roundrobin
# apiserver_loadbalancer_domain_name: "lb-apiserver.kubernetes.local"
## Set these proxy values in order to update docker daemon to use proxies
# http_proxy: ""
# https_proxy: ""

4
roles/kubernetes/master/templates/kube-apiserver.j2
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@ -21,7 +21,7 @@ KUBE_ALLOW_PRIV="--allow_privileged=true"
KUBE_API_PORT="--insecure-port={{kube_apiserver_insecure_port}} --secure-port={{ kube_apiserver_port }}"
# Insecure API address (default is localhost)
KUBE_API_INSECURE_BIND="--insecure-bind-address={{ kube_apiserver_insecure_bind_address | default('127.0.0.1') }}"
KUBE_API_INSECURE_BIND="--insecure-bind-address={{ kube_apiserver_insecure_bind_address }}"
# Address range to use for services
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range={{ kube_service_addresses }}"
@ -42,7 +42,7 @@ KUBE_RUNTIME_CONFIG="{% if kube_api_runtime_config is defined %}{% for conf in k
KUBE_TLS_CONFIG="--tls_cert_file={{ kube_cert_dir }}/apiserver.pem --tls_private_key_file={{ kube_cert_dir }}/apiserver-key.pem --client_ca_file={{ kube_cert_dir }}/ca.pem"
# Add you own!
KUBE_API_ARGS="--token_auth_file={{ kube_token_dir }}/known_tokens.csv --basic-auth-file={{ kube_users_dir }}/known_users.csv --service_account_key_file={{ kube_cert_dir }}/apiserver-key.pem --advertise-address={{ ip | default(ansible_default_ipv4.address) }}"
KUBE_API_ARGS="--token_auth_file={{ kube_token_dir }}/known_tokens.csv --basic-auth-file={{ kube_users_dir }}/known_users.csv --service_account_key_file={{ kube_cert_dir }}/apiserver-key.pem --advertise-address={{ kube_apiserver_address }}"
{% if cloud_provider is defined and cloud_provider == "openstack" %}
KUBELET_CLOUDPROVIDER="--cloud-provider={{ cloud_provider }} --cloud-config={{ kube_config_dir }}/cloud_config"

2
roles/kubernetes/master/templates/kubectl-kubeconfig.yaml.j2
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@ -5,7 +5,7 @@ preferences: {}
clusters:
- cluster:
certificate-authority-data: {{ kube_node_cert|b64encode }}
server: https://{{ groups['kube-master'][0] }}:{{ kube_apiserver_port }}
server: {{ kube_apiserver_endpoint }}
name: {{ cluster_name }}
contexts:
- context:

6
roles/kubernetes/master/templates/manifests/kube-controller-manager.manifest.j2
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@ -11,7 +11,11 @@ spec:
command:
- /hyperkube
- controller-manager
- --master=http://127.0.0.1:{{kube_apiserver_insecure_port}}
{% if kube_controller_insecure %}
- --master={{ kube_apiserver_insecure_endpoint }}
{% else %}
- --master={{ kube_apiserver_endpoint }}
{% endif %}
- --leader-elect=true
- --service-account-private-key-file={{ kube_cert_dir }}/apiserver-key.pem
- --root-ca-file={{ kube_cert_dir }}/ca.pem

6
roles/kubernetes/master/templates/manifests/kube-scheduler.manifest.j2
View File

@ -12,7 +12,11 @@ spec:
- /hyperkube
- scheduler
- --leader-elect=true
- --master=http://127.0.0.1:{{kube_apiserver_insecure_port}}
{% if kube_scheduler_insecure %}
- --master={{ kube_apiserver_insecure_endpoint }}
{% else %}
- --master={{ kube_apiserver_endpoint }}
{% endif %}
- --v={{ kube_log_level | default('2') }}
livenessProbe:
httpGet:

2
roles/kubernetes/node/templates/kubelet.j2
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@ -8,7 +8,7 @@ KUBE_LOGGING="--logtostderr=true"
KUBE_LOG_LEVEL="--v={{ kube_log_level | default('2') }}"
KUBE_ALLOW_PRIV="--allow_privileged=true"
{% if inventory_hostname in groups['kube-node'] %}
KUBELET_API_SERVER="--api_servers={% for host in groups['kube-master'] %}https://{{ hostvars[host]['access_ip'] | default(hostvars[host]['ip'] | default(hostvars[host]['ansible_default_ipv4']['address'])) }}:{{ kube_apiserver_port }}{% if not loop.last %},{% endif %}{% endfor %}"
KUBELET_API_SERVER="--api_servers={{ kube_apiserver_access_endpoint }}"
{% endif %}
# The address for the info server to serve on (set to 0.0.0.0 or "" for all interfaces)
KUBELET_ADDRESS="--address={{ ip | default("0.0.0.0") }}"

10
roles/kubernetes/node/templates/manifests/kube-proxy.manifest.j2
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@ -12,14 +12,10 @@ spec:
- /hyperkube
- proxy
- --v={{ kube_log_level | default('2') }}
{% if inventory_hostname in groups['kube-master'] %}
- --master=http://127.0.0.1:{{kube_apiserver_insecure_port}}
{% if kube_proxy_insecure %}
- --master={{ kube_apiserver_insecure_endpoint }}
{% else %}
{% if loadbalancer_apiserver is defined and apiserver_loadbalancer_domain_name is defined %}
- --master=https://{{ apiserver_loadbalancer_domain_name }}:{{ loadbalancer_apiserver.port }}
{% else %}
- --master=https://{{ hostvars[groups['kube-master'][0]]['access_ip'] | default(hostvars[groups['kube-master'][0]]['ip'] | default(hostvars[groups['kube-master'][0]]['ansible_default_ipv4']['address'])) }}:{{ kube_apiserver_port }}
{% endif%}
- --master={{ kube_apiserver_access_endpoint }}
- --kubeconfig=/etc/kubernetes/node-kubeconfig.yaml
{% endif %}
- --bind-address={{ ip | default(ansible_default_ipv4.address) }}

34
roles/kubernetes/preinstall/tasks/set_facts.yml
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@ -1,4 +1,38 @@
---
- set_fact: kube_apiserver_count="{{ groups['kube-master'] | length }}"
- set_fact: kube_apiserver_address="{{ ip | default(ansible_default_ipv4['address']) }}"
- set_fact: kube_apiserver_access_address="{{ access_ip | default(kube_apiserver_address) }}"
- set_fact:
kube_apiserver_insecure_bind_address: |-
{% if loadbalancer_apiserver_localhost %}
{{ kube_apiserver_address }}{% else %}127.0.0.1{% endif %}
- set_fact:
apiserver_access_port: |-
{% if loadbalancer_apiserver is defined and loadbalancer_apiserver.port is defined %}
{{ loadbalancer_apiserver.port }}{% else %}{{ kube_apiserver_port }}{% endif %}
- set_fact:
kube_apiserver_endpoint: |-
{% if loadbalancer_apiserver_localhost %}
https://127.0.0.1:{{ apiserver_access_port }}
{% else -%}
https://{{ apiserver_loadbalancer_domain_name|default(kube_apiserver_access_address) }}:{{ apiserver_access_port }}
{%- endif %}
- set_fact: kube_apiserver_insecure_endpoint="http://{{ kube_apiserver_insecure_bind_address }}:{{ kube_apiserver_insecure_port }}"
- set_fact:
kube_apiserver_access_endpoint: |-
{% if kube_apiserver_multiaccess %}
{% for host in groups['kube-master'] -%}
https://{{ hostvars[host].kube_apiserver_access_address }}:{{ kube_apiserver_port }}{% if not loop.last %},{% endif %}
{%- endfor %}
{% else %}{{ kube_apiserver_endpoint }}{% endif %}
- set_fact:
kube_apiserver_insecure_access_endpoint: |-
{% if kube_apiserver_multiaccess %}
{% for host in groups['kube-master'] -%}
https://{{ hostvars[host].kube_apiserver_insecure_bind_address }}:{{ kube_apiserver_insecure_port }}{% if not loop.last %},{% endif %}
{%- endfor %}
{% else %}{{ kube_apiserver_insecure_endpoint }}{% endif %}
- set_fact: etcd_address="{{ ip | default(ansible_default_ipv4['address']) }}"
- set_fact: etcd_access_address="{{ access_ip | default(etcd_address) }}"
- set_fact: etcd_peer_url="http://{{ etcd_access_address }}:2380"