Replace flannel with calico (#26)
* Uses the existing Kubernetes etcd cluster to store calico data. * Adds `b64enc` filter for templates (useful for Secrets).
This commit is contained in:
Mark Burnett
Alan Meadows
parent
78f42d657e
commit
9f968115b5
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@ -44,6 +44,7 @@ spec:
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kube_service_ip: 10.96.0.1
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pod_ip_cidr: 10.97.0.0/16
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service_ip_cidr: 10.96.0.0/16
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etcd_service_ip: 10.96.232.136
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dns_servers:
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- 8.8.8.8
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- 8.8.4.4
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@ -251,13 +251,21 @@ def _master_config(hostname, host_data, masters, network, keys):
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'kubernetes.default.svc.cluster.local',
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'127.0.0.1',
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]
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calico_domains = [
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'calico-etcd',
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'calico-etcd.kube-system',
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'calico-etcd.kube-system.svc',
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'calico-etcd.kube-system.svc.cluster.local',
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network['etcd_service_ip'],
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]
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docs = []
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docs.extend(keys.generate_certificate(
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alias='etcd-client',
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name='etcd:client:%s' % hostname,
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ca_name='etcd-client',
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hosts=kube_domains + [hostname, host_data['ip']],
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hosts=kube_domains + calico_domains + [hostname, host_data['ip']],
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target=hostname,
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))
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docs.extend(keys.generate_certificate(
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@ -267,6 +275,7 @@ def _master_config(hostname, host_data, masters, network, keys):
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hosts=[hostname, host_data['ip']],
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target=hostname,
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))
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docs.extend(keys.generate_certificate(
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alias='etcd-peer',
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name='etcd:peer:%s' % hostname,
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@ -332,6 +341,13 @@ def _genesis_config(hostname, host_data, masters, network, keys):
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target=hostname,
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))
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docs.extend(keys.generate_certificate(
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alias='etcd-calico-client',
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name='etcd:client:calico',
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ca_name='etcd-client',
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target=hostname,
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))
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return docs
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@ -1,4 +1,5 @@
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from . import logging
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import base64
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import jinja2
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import os
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import pkg_resources
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@ -38,6 +39,7 @@ class Renderer:
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LOG.debug('Templating "%s" into "%s"', path, target_path)
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env = jinja2.Environment(undefined=jinja2.StrictUndefined)
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env.filters['b64enc'] = _base64_encode
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with open(path) as f:
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template = env.from_string(f.read())
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@ -52,3 +54,7 @@ class Renderer:
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def _ensure_path(path):
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base = os.path.dirname(path)
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os.makedirs(base, mode=0o775, exist_ok=True)
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def _base64_encode(s):
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return base64.b64encode(s.encode()).decode()
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@ -0,0 +1,422 @@
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---
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# This manfiest installs the Service which gets traffic to the Calico
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# etcd.
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apiVersion: v1
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kind: Service
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metadata:
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labels:
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tier: control-plane
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component: kube-etcd
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name: calico-etcd
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namespace: kube-system
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spec:
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# Select the calico-etcd pod running on the master.
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selector:
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tier: control-plane
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component: kube-etcd
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# This ClusterIP needs to be known in advance, since we cannot rely
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# on DNS to get access to etcd.
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clusterIP: {{ config['Network']['etcd_service_ip'] }}
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ports:
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- port: 2379
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---
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# Calico Version v2.2.1
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# http://docs.projectcalico.org/v2.2/releases#v2.2.1
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# This manifest includes the following component versions:
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# calico/node:v1.2.1
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# calico/cni:v1.8.3
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# calico/kube-policy-controller:v0.6.0
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# This ConfigMap is used to configure a self-hosted Calico installation.
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kind: ConfigMap
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apiVersion: v1
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metadata:
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name: calico-config
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namespace: kube-system
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data:
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# The location of your etcd cluster. This uses the Service clusterIP
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# defined below.
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etcd_endpoints: https://{{ config['Network']['etcd_service_ip'] }}:2379
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# Configure the Calico backend to use.
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calico_backend: "bird"
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# The CNI network configuration to install on each node.
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cni_network_config: |-
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{
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"name": "k8s-pod-network",
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"cniVersion": "0.1.0",
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"type": "calico",
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"etcd_endpoints": "__ETCD_ENDPOINTS__",
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"etcd_key_file": "__ETCD_KEY_FILE__",
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"etcd_cert_file": "__ETCD_CERT_FILE__",
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"etcd_ca_cert_file": "__ETCD_CA_CERT_FILE__",
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"log_level": "info",
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"ipam": {
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"type": "calico-ipam"
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},
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"policy": {
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"type": "k8s",
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"k8s_api_root": "https://__KUBERNETES_SERVICE_HOST__:__KUBERNETES_SERVICE_PORT__",
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"k8s_auth_token": "__SERVICEACCOUNT_TOKEN__"
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},
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"kubernetes": {
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"kubeconfig": "/etc/cni/net.d/__KUBECONFIG_FILENAME__"
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}
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}
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# If you're using TLS enabled etcd uncomment the following.
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# You must also populate the Secret below with these files.
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etcd_ca: "/calico-secrets/etcd-ca"
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etcd_cert: "/calico-secrets/etcd-cert"
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etcd_key: "/calico-secrets/etcd-key"
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# ippool.yaml: |-
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# apiVersion: v1
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# kind: ipPool
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# metadata:
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# cidr: {{ config['Network']['pod_ip_cidr'] }}
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# spec:
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# ipip:
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# enabled: true
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# nat-outgoing: true
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---
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# The following contains k8s Secrets for use with a TLS enabled etcd cluster.
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# For information on populating Secrets, see http://kubernetes.io/docs/user-guide/secrets/
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apiVersion: v1
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kind: Secret
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type: Opaque
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metadata:
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name: calico-etcd-secrets
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namespace: kube-system
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data:
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# Populate the following files with etcd TLS configuration if desired, but leave blank if
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# not using TLS for etcd.
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# This self-hosted install expects three files with the following names. The values
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# should be base64 encoded strings of the entire contents of each file.
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etcd-key: {{ config.get(kind='CertificateKey', alias='etcd-calico-client')['data'] | b64enc }}
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etcd-cert: {{ config.get(kind='Certificate', alias='etcd-calico-client')['data'] | b64enc }}
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etcd-ca: {{ config.get(kind='CertificateAuthority', name='etcd-client')['data'] | b64enc }}
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---
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# This manifest installs the calico/node container, as well
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# as the Calico CNI plugins and network config on
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# each master and worker node in a Kubernetes cluster.
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kind: DaemonSet
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apiVersion: extensions/v1beta1
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metadata:
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name: calico-node
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namespace: kube-system
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labels:
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k8s-app: calico-node
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spec:
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selector:
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matchLabels:
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k8s-app: calico-node
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template:
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metadata:
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labels:
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k8s-app: calico-node
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annotations:
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# Mark this pod as a critical add-on; when enabled, the critical add-on scheduler
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# reserves resources for critical add-on pods so that they can be rescheduled after
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# a failure. This annotation works in tandem with the toleration below.
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scheduler.alpha.kubernetes.io/critical-pod: ''
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spec:
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hostNetwork: true
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tolerations:
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- key: node-role.kubernetes.io/master
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effect: NoSchedule
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# Allow this pod to be rescheduled while the node is in "critical add-ons only" mode.
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# This, along with the annotation above marks this pod as a critical add-on.
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- key: CriticalAddonsOnly
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operator: Exists
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serviceAccountName: calico-cni-plugin
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containers:
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# Runs calico/node container on each Kubernetes node. This
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# container programs network policy and routes on each
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# host.
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- name: calico-node
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image: quay.io/calico/node:v1.3.0
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env:
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# The location of the Calico etcd cluster.
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- name: ETCD_ENDPOINTS
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_endpoints
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- name: WAIT_FOR_DATASTORE
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value: "true"
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- name: NODENAME
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valueFrom:
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fieldRef:
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fieldPath: spec.nodeName
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# Enable BGP. Disable to enforce policy only.
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- name: CALICO_NETWORKING_BACKEND
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: calico_backend
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# Disable file logging so `kubectl logs` works.
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- name: CALICO_DISABLE_FILE_LOGGING
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value: "true"
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# Set Felix endpoint to host default action to ACCEPT.
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- name: FELIX_DEFAULTENDPOINTTOHOSTACTION
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value: "ACCEPT"
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# Configure the IP Pool from which Pod IPs will be chosen.
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- name: CALICO_IPV4POOL_CIDR
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value: {{ config['Network']['pod_ip_cidr'] }}
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- name: CALICO_IPV4POOL_IPIP
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value: "always"
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# Disable IPv6 on Kubernetes.
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- name: FELIX_IPV6SUPPORT
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value: "false"
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# Set Felix logging to "info"
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- name: FELIX_LOGSEVERITYSCREEN
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value: "info"
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# Location of the CA certificate for etcd.
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- name: ETCD_CA_CERT_FILE
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_ca
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# Location of the client key for etcd.
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- name: ETCD_KEY_FILE
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_key
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# Location of the client certificate for etcd.
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- name: ETCD_CERT_FILE
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_cert
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# Auto-detect the BGP IP address.
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- name: IP
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value: ""
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securityContext:
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privileged: true
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resources:
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requests:
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cpu: 250m
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volumeMounts:
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- mountPath: /lib/modules
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name: lib-modules
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readOnly: true
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- mountPath: /var/run/calico
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name: var-run-calico
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readOnly: false
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- mountPath: /calico-secrets
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name: etcd-certs
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# This container installs the Calico CNI binaries
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# and CNI network config file on each node.
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- name: install-cni
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image: quay.io/calico/cni:v1.9.1
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command: ["/install-cni.sh"]
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env:
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# The location of the Calico etcd cluster.
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- name: ETCD_ENDPOINTS
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_endpoints
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- name: ETCD_CA_CERT_FILE
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value: /etc/kubernetes/calico/pki/etcd-client-ca.pem
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- name: ETCD_CERT_FILE
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value: /etc/kubernetes/calico/pki/etcd-client.pem
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- name: ETCD_KEY_FILE
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value: /etc/kubernetes/calico/pki/etcd-client-key.pem
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# The CNI network config to install on each node.
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- name: CNI_NETWORK_CONFIG
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: cni_network_config
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volumeMounts:
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- mountPath: /host/opt/cni/bin
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name: cni-bin-dir
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- mountPath: /host/etc/cni/net.d
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name: cni-net-dir
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- mountPath: /calico-secrets
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name: etcd-certs
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volumes:
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# Used by calico/node.
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- name: lib-modules
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hostPath:
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path: /lib/modules
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- name: var-run-calico
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hostPath:
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path: /var/run/calico
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# Used to install CNI.
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- name: cni-bin-dir
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hostPath:
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path: /opt/cni/bin
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- name: cni-net-dir
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hostPath:
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path: /etc/cni/net.d
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# Mount in the etcd TLS secrets.
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- name: etcd-certs
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secret:
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secretName: calico-etcd-secrets
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---
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# This manifest deploys the Calico policy controller on Kubernetes.
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# See https://github.com/projectcalico/k8s-policy
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apiVersion: extensions/v1beta1
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kind: Deployment
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metadata:
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name: calico-policy-controller
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namespace: kube-system
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labels:
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k8s-app: calico-policy
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spec:
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# The policy controller can only have a single active instance.
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replicas: 1
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strategy:
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type: Recreate
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template:
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metadata:
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name: calico-policy-controller
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namespace: kube-system
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labels:
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k8s-app: calico-policy-controller
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annotations:
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# Mark this pod as a critical add-on; when enabled, the critical add-on scheduler
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# reserves resources for critical add-on pods so that they can be rescheduled after
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# a failure. This annotation works in tandem with the toleration below.
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scheduler.alpha.kubernetes.io/critical-pod: ''
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spec:
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# The policy controller must run in the host network namespace so that
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# it isn't governed by policy that would prevent it from working.
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hostNetwork: true
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tolerations:
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- key: node-role.kubernetes.io/master
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effect: NoSchedule
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# Allow this pod to be rescheduled while the node is in "critical add-ons only" mode.
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# This, along with the annotation above marks this pod as a critical add-on.
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- key: CriticalAddonsOnly
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operator: Exists
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serviceAccountName: calico-policy-controller
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containers:
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- name: calico-policy-controller
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image: quay.io/calico/kube-policy-controller:v0.6.0
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env:
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# The location of the Calico etcd cluster.
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- name: ETCD_ENDPOINTS
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_endpoints
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# Location of the CA certificate for etcd.
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- name: ETCD_CA_CERT_FILE
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_ca
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# Location of the client key for etcd.
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- name: ETCD_KEY_FILE
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_key
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# Location of the client certificate for etcd.
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- name: ETCD_CERT_FILE
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valueFrom:
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configMapKeyRef:
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name: calico-config
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key: etcd_cert
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# The location of the Kubernetes API. Use the default Kubernetes
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# service for API access.
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- name: K8S_API
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value: "https://kubernetes.default:443"
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# Since we're running in the host namespace and might not have KubeDNS
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# access, configure the container's /etc/hosts to resolve
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# kubernetes.default to the correct service clusterIP.
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- name: CONFIGURE_ETC_HOSTS
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value: "true"
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volumeMounts:
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# Mount in the etcd TLS secrets.
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- mountPath: /calico-secrets
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name: etcd-certs
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volumes:
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# Mount in the etcd TLS secrets.
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- name: etcd-certs
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secret:
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secretName: calico-etcd-secrets
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---
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apiVersion: rbac.authorization.k8s.io/v1beta1
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kind: ClusterRoleBinding
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metadata:
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name: calico-cni-plugin
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: ClusterRole
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name: calico-cni-plugin
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subjects:
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- kind: ServiceAccount
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name: calico-cni-plugin
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namespace: kube-system
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---
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kind: ClusterRole
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apiVersion: rbac.authorization.k8s.io/v1beta1
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metadata:
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name: calico-cni-plugin
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namespace: kube-system
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rules:
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- apiGroups: [""]
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resources:
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- pods
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- nodes
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verbs:
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- get
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---
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: calico-cni-plugin
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namespace: kube-system
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---
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apiVersion: rbac.authorization.k8s.io/v1beta1
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kind: ClusterRoleBinding
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metadata:
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name: calico-policy-controller
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: ClusterRole
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name: calico-policy-controller
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subjects:
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- kind: ServiceAccount
|
||||
name: calico-policy-controller
|
||||
namespace: kube-system
|
||||
|
||||
---
|
||||
kind: ClusterRole
|
||||
apiVersion: rbac.authorization.k8s.io/v1beta1
|
||||
metadata:
|
||||
name: calico-policy-controller
|
||||
namespace: kube-system
|
||||
rules:
|
||||
- apiGroups:
|
||||
- ""
|
||||
- extensions
|
||||
resources:
|
||||
- pods
|
||||
- namespaces
|
||||
- networkpolicies
|
||||
verbs:
|
||||
- watch
|
||||
- list
|
||||
|
||||
---
|
||||
apiVersion: v1
|
||||
kind: ServiceAccount
|
||||
metadata:
|
||||
name: calico-policy-controller
|
||||
namespace: kube-system
|
||||
|
|
@ -1,140 +0,0 @@
|
|||
---
|
||||
apiVersion: v1
|
||||
kind: ServiceAccount
|
||||
metadata:
|
||||
name: flannel
|
||||
namespace: kube-system
|
||||
|
||||
---
|
||||
kind: ClusterRole
|
||||
apiVersion: rbac.authorization.k8s.io/v1beta1
|
||||
metadata:
|
||||
name: flannel
|
||||
namespace: kube-system
|
||||
rules:
|
||||
- apiGroups:
|
||||
- ""
|
||||
resources:
|
||||
- pods
|
||||
verbs:
|
||||
- get
|
||||
- apiGroups:
|
||||
- ""
|
||||
resources:
|
||||
- nodes
|
||||
verbs:
|
||||
- list
|
||||
- watch
|
||||
- apiGroups:
|
||||
- ""
|
||||
resources:
|
||||
- nodes/status
|
||||
verbs:
|
||||
- patch
|
||||
|
||||
---
|
||||
kind: ClusterRoleBinding
|
||||
apiVersion: rbac.authorization.k8s.io/v1beta1
|
||||
metadata:
|
||||
name: flannel
|
||||
namespace: kube-system
|
||||
roleRef:
|
||||
apiGroup: rbac.authorization.k8s.io
|
||||
kind: ClusterRole
|
||||
name: flannel
|
||||
subjects:
|
||||
- kind: ServiceAccount
|
||||
name: flannel
|
||||
namespace: kube-system
|
||||
|
||||
---
|
||||
kind: ConfigMap
|
||||
apiVersion: v1
|
||||
metadata:
|
||||
name: kube-flannel-cfg
|
||||
namespace: kube-system
|
||||
labels:
|
||||
tier: node
|
||||
app: flannel
|
||||
data:
|
||||
cni-conf.json: |
|
||||
{
|
||||
"name": "cbr0",
|
||||
"type": "flannel",
|
||||
"delegate": {
|
||||
"isDefaultGateway": true
|
||||
}
|
||||
}
|
||||
net-conf.json: |
|
||||
{
|
||||
"Network": "{{ config['Network']['pod_ip_cidr'] }}",
|
||||
"Backend": {
|
||||
"Type": "vxlan"
|
||||
}
|
||||
}
|
||||
|
||||
---
|
||||
apiVersion: extensions/v1beta1
|
||||
kind: DaemonSet
|
||||
metadata:
|
||||
name: kube-flannel-ds
|
||||
namespace: kube-system
|
||||
labels:
|
||||
tier: node
|
||||
app: flannel
|
||||
spec:
|
||||
template:
|
||||
metadata:
|
||||
labels:
|
||||
tier: node
|
||||
app: flannel
|
||||
spec:
|
||||
hostNetwork: true
|
||||
nodeSelector:
|
||||
beta.kubernetes.io/arch: amd64
|
||||
tolerations:
|
||||
- key: node-role.kubernetes.io/master
|
||||
operator: Exists
|
||||
effect: NoSchedule
|
||||
serviceAccountName: flannel
|
||||
containers:
|
||||
- name: kube-flannel
|
||||
image: quay.io/coreos/flannel:v0.7.1-amd64
|
||||
command:
|
||||
- /opt/bin/flanneld
|
||||
- --ip-masq
|
||||
- --kube-subnet-mgr
|
||||
securityContext:
|
||||
privileged: true
|
||||
env:
|
||||
- name: POD_NAME
|
||||
valueFrom:
|
||||
fieldRef:
|
||||
fieldPath: metadata.name
|
||||
- name: POD_NAMESPACE
|
||||
valueFrom:
|
||||
fieldRef:
|
||||
fieldPath: metadata.namespace
|
||||
volumeMounts:
|
||||
- name: run
|
||||
mountPath: /run
|
||||
- name: flannel-cfg
|
||||
mountPath: /etc/kube-flannel/
|
||||
- name: install-cni
|
||||
image: quay.io/coreos/flannel:v0.7.1-amd64
|
||||
command: [ "/bin/sh", "-c", "set -e -x; cp -f /etc/kube-flannel/cni-conf.json /etc/cni/net.d/10-flannel.conf; while true; do sleep 3600; done" ]
|
||||
volumeMounts:
|
||||
- name: cni
|
||||
mountPath: /etc/cni/net.d
|
||||
- name: flannel-cfg
|
||||
mountPath: /etc/kube-flannel/
|
||||
volumes:
|
||||
- name: run
|
||||
hostPath:
|
||||
path: /run
|
||||
- name: cni
|
||||
hostPath:
|
||||
path: /etc/cni/net.d
|
||||
- name: flannel-cfg
|
||||
configMap:
|
||||
name: kube-flannel-cfg
|
||||
Loading…
Reference in New Issue