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canal.go
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package templates
const CanalTemplateV112 = `
{{if eq .RBACConfig "rbac"}}
# Calico Roles
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: calico
rules:
- apiGroups: [""]
resources:
- namespaces
verbs:
- get
- list
- watch
- apiGroups: [""]
resources:
- pods/status
verbs:
- update
- apiGroups: [""]
resources:
- pods
verbs:
- get
- list
- watch
- patch
- apiGroups: [""]
resources:
- services
verbs:
- get
- apiGroups: [""]
resources:
- endpoints
verbs:
- get
- apiGroups: [""]
resources:
- nodes
verbs:
- get
- list
- update
- watch
- apiGroups: ["networking.k8s.io"]
resources:
- networkpolicies
verbs:
- get
- list
- watch
- apiGroups: ["crd.projectcalico.org"]
resources:
- globalfelixconfigs
- felixconfigurations
- bgppeers
- globalbgpconfigs
- bgpconfigurations
- ippools
- globalnetworkpolicies
- networkpolicies
- clusterinformations
- hostendpoints
- globalnetworksets
verbs:
- create
- get
- list
- update
- watch
---
# Flannel roles
# Pulled from https://github.com/coreos/flannel/blob/master/Documentation/kube-flannel-rbac.yml
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: flannel
rules:
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
# Bind the flannel ClusterRole to the canal ServiceAccount.
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: canal-flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: canal
namespace: kube-system
---
# Bind the calico ClusterRole to the canal ServiceAccount.
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: canal-calico
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: calico
subjects:
- kind: ServiceAccount
name: canal
namespace: kube-system
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
{{end}}
# Canal Version v3.1.1
# https://docs.projectcalico.org/v3.1/releases#v3.1.1
# This manifest includes the following component versions:
# calico/node:v3.1.1
# calico/cni:v3.1.1
# coreos/flannel:v0.9.1
---
# This ConfigMap can be used to configure a self-hosted Canal installation.
kind: ConfigMap
apiVersion: v1
metadata:
name: canal-config
namespace: kube-system
data:
# The interface used by canal for host <-> host communication.
# If left blank, then the interface is chosen using the node's
# default route.
canal_iface: "{{.CanalInterface}}"
# Whether or not to masquerade traffic to destinations not within
# the pod network.
masquerade: "true"
# The CNI network configuration to install on each node.
cni_network_config: |-
{
"name": "k8s-pod-network",
"cniVersion": "0.3.0",
"plugins": [
{
"type": "calico",
"log_level": "WARNING",
"datastore_type": "kubernetes",
"nodename": "__KUBERNETES_NODE_NAME__",
"ipam": {
"type": "host-local",
"subnet": "usePodCidr"
},
"policy": {
"type": "k8s",
"k8s_auth_token": "__SERVICEACCOUNT_TOKEN__"
},
"kubernetes": {
"k8s_api_root": "https://__KUBERNETES_SERVICE_HOST__:__KUBERNETES_SERVICE_PORT__",
"kubeconfig": "{{.KubeCfg}}"
}
},
{
"type": "portmap",
"snat": true,
"capabilities": {"portMappings": true}
}
]
}
# Flannel network configuration. Mounted into the flannel container.
net-conf.json: |
{
"Network": "{{.ClusterCIDR}}",
"Backend": {
"Type": "{{.FlannelBackend.Type}}",
"VNI": {{.FlannelBackend.VNI}},
"Port": {{.FlannelBackend.Port}}
}
}
---
# This manifest installs the calico/node container, as well
# as the Calico CNI plugins and network config on
# each master and worker node in a Kubernetes cluster.
kind: DaemonSet
apiVersion: extensions/v1beta1
metadata:
name: canal
namespace: kube-system
labels:
k8s-app: canal
spec:
selector:
matchLabels:
k8s-app: canal
updateStrategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
template:
metadata:
labels:
k8s-app: canal
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ''
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: NotIn
values:
- windows
hostNetwork: true
{{if .NodeSelector}}
nodeSelector:
{{ range $k, $v := .NodeSelector }}
{{ $k }}: "{{ $v }}"
{{ end }}
{{end}}
serviceAccountName: canal
tolerations:
# Tolerate this effect so the pods will be schedulable at all times
- effect: NoSchedule
operator: Exists
# Mark the pod as a critical add-on for rescheduling.
- key: CriticalAddonsOnly
operator: Exists
- effect: NoExecute
operator: Exists
- key: "node-role.kubernetes.io/controlplane"
operator: "Exists"
effect: "NoSchedule"
- key: "node-role.kubernetes.io/etcd"
operator: "Exists"
effect: "NoExecute"
# Minimize downtime during a rolling upgrade or deletion; tell Kubernetes to do a "force
# deletion": https://kubernetes.io/docs/concepts/workloads/pods/pod/#termination-of-pods.
terminationGracePeriodSeconds: 0
containers:
# Runs calico/node container on each Kubernetes node. This
# container programs network policy and routes on each
# host.
- name: calico-node
image: {{.NodeImage}}
env:
# Use Kubernetes API as the backing datastore.
- name: DATASTORE_TYPE
value: "kubernetes"
# Disable felix logging to file
- name: FELIX_LOGFILEPATH
value: "none"
# Disable felix logging for syslog
- name: FELIX_LOGSEVERITYSYS
value: ""
# Enable felix logging to stdout
- name: FELIX_LOGSEVERITYSCREEN
value: "Warning"
# Don't enable BGP.
- name: CALICO_NETWORKING_BACKEND
value: "none"
# Cluster type to identify the deployment type
- name: CLUSTER_TYPE
value: "k8s,canal"
# Disable file logging so kubectl logs works.
- name: CALICO_DISABLE_FILE_LOGGING
value: "true"
# Period, in seconds, at which felix re-applies all iptables state
- name: FELIX_IPTABLESREFRESHINTERVAL
value: "60"
# Disable IPV6 support in Felix.
- name: FELIX_IPV6SUPPORT
value: "false"
# Wait for the datastore.
- name: WAIT_FOR_DATASTORE
value: "true"
# No IP address needed.
- name: IP
value: ""
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
# Set Felix endpoint to host default action to ACCEPT.
- name: FELIX_DEFAULTENDPOINTTOHOSTACTION
value: "ACCEPT"
- name: FELIX_HEALTHENABLED
value: "true"
securityContext:
privileged: true
resources:
requests:
cpu: 250m
livenessProbe:
httpGet:
path: /liveness
port: 9099
periodSeconds: 10
initialDelaySeconds: 10
failureThreshold: 6
readinessProbe:
httpGet:
path: /readiness
port: 9099
periodSeconds: 10
volumeMounts:
- mountPath: /lib/modules
name: lib-modules
readOnly: true
- mountPath: /var/run/calico
name: var-run-calico
readOnly: false
- mountPath: /var/lib/calico
name: var-lib-calico
readOnly: false
# This container installs the Calico CNI binaries
# and CNI network config file on each node.
- name: install-cni
image: {{.CNIImage}}
command: ["/install-cni.sh"]
env:
- name: CNI_CONF_NAME
value: "10-calico.conflist"
# The CNI network config to install on each node.
- name: CNI_NETWORK_CONFIG
valueFrom:
configMapKeyRef:
name: canal-config
key: cni_network_config
- name: KUBERNETES_NODE_NAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
volumeMounts:
- mountPath: /host/opt/cni/bin
name: cni-bin-dir
- mountPath: /host/etc/cni/net.d
name: cni-net-dir
# This container runs flannel using the kube-subnet-mgr backend
# for allocating subnets.
- name: kube-flannel
image: {{.CanalFlannelImg}}
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
- name: FLANNELD_IFACE
valueFrom:
configMapKeyRef:
name: canal-config
key: canal_iface
- name: FLANNELD_IP_MASQ
valueFrom:
configMapKeyRef:
name: canal-config
key: masquerade
volumeMounts:
- name: run
mountPath: /run
- name: flannel-cfg
mountPath: /etc/kube-flannel/
- name: xtables-lock
mountPath: /run/xtables.lock
readOnly: false
volumes:
# Used by calico/node.
- name: lib-modules
hostPath:
path: /lib/modules
- name: var-run-calico
hostPath:
path: /var/run/calico
- name: var-lib-calico
hostPath:
path: /var/lib/calico
# Used to install CNI.
- name: cni-bin-dir
hostPath:
path: /opt/cni/bin
- name: cni-net-dir
hostPath:
path: /etc/cni/net.d
# Used by flannel.
- name: run
hostPath:
path: /run
- name: flannel-cfg
configMap:
name: canal-config
- name: xtables-lock
hostPath:
path: /run/xtables.lock
type: FileOrCreate
# Create all the CustomResourceDefinitions needed for
# Calico policy-only mode.
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: felixconfigurations.crd.projectcalico.org
spec:
scope: Cluster
group: crd.projectcalico.org
version: v1
names:
kind: FelixConfiguration
plural: felixconfigurations
singular: felixconfiguration
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: bgpconfigurations.crd.projectcalico.org
spec:
scope: Cluster
group: crd.projectcalico.org
version: v1
names:
kind: BGPConfiguration
plural: bgpconfigurations
singular: bgpconfiguration
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: ippools.crd.projectcalico.org
spec:
scope: Cluster
group: crd.projectcalico.org
version: v1
names:
kind: IPPool
plural: ippools
singular: ippool
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: clusterinformations.crd.projectcalico.org
spec:
scope: Cluster
group: crd.projectcalico.org
version: v1
names:
kind: ClusterInformation
plural: clusterinformations
singular: clusterinformation
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: globalnetworkpolicies.crd.projectcalico.org
spec:
scope: Cluster
group: crd.projectcalico.org
version: v1
names:
kind: GlobalNetworkPolicy
plural: globalnetworkpolicies
singular: globalnetworkpolicy
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: networkpolicies.crd.projectcalico.org
spec:
scope: Namespaced
group: crd.projectcalico.org
version: v1
names:
kind: NetworkPolicy
plural: networkpolicies
singular: networkpolicy
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: globalnetworksets.crd.projectcalico.org
spec:
scope: Cluster
group: crd.projectcalico.org
version: v1
names:
kind: GlobalNetworkSet
plural: globalnetworksets
singular: globalnetworkset
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: hostendpoints.crd.projectcalico.org
spec:
scope: Cluster
group: crd.projectcalico.org
version: v1
names:
kind: HostEndpoint
plural: hostendpoints
singular: hostendpoint
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: canal
namespace: kube-system
`
const CanalTemplateV113 = `
{{if eq .RBACConfig "rbac"}}
# Include a clusterrole for the calico-node DaemonSet,
# and bind it to the calico-node serviceaccount.
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: calico
rules:
# The CNI plugin needs to get pods, nodes, and namespaces.
- apiGroups: [""]
resources:
- pods
- nodes
- namespaces
verbs:
- get
- apiGroups: [""]
resources:
- endpoints
- services
verbs:
# Used to discover service IPs for advertisement.
- watch
- list
# Used to discover Typhas.
- get
- apiGroups: [""]
resources:
- nodes/status
verbs:
# Needed for clearing NodeNetworkUnavailable flag.
- patch
# Calico stores some configuration information in node annotations.
- update
# Watch for changes to Kubernetes NetworkPolicies.
- apiGroups: ["networking.k8s.io"]
resources:
- networkpolicies
verbs:
- watch
- list
# Used by Calico for policy information.
- apiGroups: [""]
resources:
- pods
- namespaces
- serviceaccounts
verbs:
- list
- watch
# The CNI plugin patches pods/status.
- apiGroups: [""]
resources:
- pods/status
verbs:
- patch
# Calico monitors various CRDs for config.
- apiGroups: ["crd.projectcalico.org"]
resources:
- globalfelixconfigs
- felixconfigurations
- bgppeers
- globalbgpconfigs
- bgpconfigurations
- ippools
- globalnetworkpolicies
- globalnetworksets
- networkpolicies
- clusterinformations
- hostendpoints
verbs:
- get
- list
- watch
# Calico must create and update some CRDs on startup.
- apiGroups: ["crd.projectcalico.org"]
resources:
- ippools
- felixconfigurations
- clusterinformations
verbs:
- create
- update
# Calico stores some configuration information on the node.
- apiGroups: [""]
resources:
- nodes
verbs:
- get
- list
- watch
# These permissions are only requried for upgrade from v2.6, and can
# be removed after upgrade or on fresh installations.
- apiGroups: ["crd.projectcalico.org"]
resources:
- bgpconfigurations
- bgppeers
verbs:
- create
- update
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: calico-node
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: calico-node
subjects:
- kind: ServiceAccount
name: calico-node
namespace: kube-system
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
---
# Flannel ClusterRole
# Pulled from https://github.com/coreos/flannel/blob/master/Documentation/kube-flannel-rbac.yml
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: flannel
rules:
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
# Bind the flannel ClusterRole to the canal ServiceAccount.
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: canal-flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: canal
namespace: kube-system
---
# Bind the Calico ClusterRole to the canal ServiceAccount.
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: canal-calico
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: calico
subjects:
- kind: ServiceAccount
name: canal
namespace: kube-system
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
{{end}}
# Canal Version v3.1.1
# https://docs.projectcalico.org/v3.1/releases#v3.1.1
# This manifest includes the following component versions:
# calico/node:v3.1.1
# calico/cni:v3.1.1
# coreos/flannel:v0.9.1
---
# This ConfigMap is used to configure a self-hosted Canal installation.
kind: ConfigMap
apiVersion: v1
metadata:
name: canal-config
namespace: kube-system
data:
# The interface used by canal for host <-> host communication.
# If left blank, then the interface is chosen using the node's
# default route.
canal_iface: "{{.CanalInterface}}"
# Whether or not to masquerade traffic to destinations not within
# the pod network.
masquerade: "true"
# The CNI network configuration to install on each node. The special
# values in this config will be automatically populated.
cni_network_config: |-
{
"name": "k8s-pod-network",
"cniVersion": "0.3.0",
"plugins": [
{
"type": "calico",
"log_level": "WARNING",
"datastore_type": "kubernetes",
"nodename": "__KUBERNETES_NODE_NAME__",
"ipam": {
"type": "host-local",
"subnet": "usePodCidr"
},
"policy": {
"type": "k8s"
},
"kubernetes": {
"kubeconfig": "{{.KubeCfg}}"
}
},
{
"type": "portmap",
"snat": true,
"capabilities": {"portMappings": true}
}
]
}
# Flannel network configuration. Mounted into the flannel container.
net-conf.json: |
{
"Network": "{{.ClusterCIDR}}",
"Backend": {
"Type": "{{.FlannelBackend.Type}}"
}
}
---
# This manifest installs the calico/node container, as well
# as the Calico CNI plugins and network config on
# each master and worker node in a Kubernetes cluster.
kind: DaemonSet
apiVersion: extensions/v1beta1
metadata:
name: canal
namespace: kube-system
labels:
k8s-app: canal
spec:
selector:
matchLabels:
k8s-app: canal
updateStrategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
template:
metadata:
labels:
k8s-app: canal
annotations:
# This, along with the CriticalAddonsOnly toleration below,
# marks the pod as a critical add-on, ensuring it gets
# priority scheduling and that its resources are reserved
# if it ever gets evicted.
scheduler.alpha.kubernetes.io/critical-pod: ''
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: NotIn
values:
- windows
hostNetwork: true
{{if .NodeSelector}}
nodeSelector:
{{ range $k, $v := .NodeSelector }}
{{ $k }}: "{{ $v }}"
{{ end }}
{{end}}
tolerations:
# Make sure canal gets scheduled on all nodes.
- effect: NoSchedule
operator: Exists
# Mark the pod as a critical add-on for rescheduling.
- key: CriticalAddonsOnly
operator: Exists
- effect: NoExecute
operator: Exists
serviceAccountName: canal
# Minimize downtime during a rolling upgrade or deletion; tell Kubernetes to do a "force
# deletion": https://kubernetes.io/docs/concepts/workloads/pods/pod/#termination-of-pods.
terminationGracePeriodSeconds: 0
initContainers:
# This container installs the Calico CNI binaries
# and CNI network config file on each node.
- name: install-cni
image: {{.CNIImage}}
command: ["/install-cni.sh"]
env:
# Name of the CNI config file to create.
- name: CNI_CONF_NAME
value: "10-canal.conflist"
# The CNI network config to install on each node.
- name: CNI_NETWORK_CONFIG
valueFrom:
configMapKeyRef:
name: canal-config
key: cni_network_config
# Set the hostname based on the k8s node name.
- name: KUBERNETES_NODE_NAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
# Prevents the container from sleeping forever.
- name: SLEEP
value: "false"
volumeMounts:
- mountPath: /host/opt/cni/bin
name: cni-bin-dir
- mountPath: /host/etc/cni/net.d
name: cni-net-dir
containers:
# Runs calico/node container on each Kubernetes node. This
# container programs network policy and routes on each
# host.
- name: calico-node
image: {{.NodeImage}}
env:
# Use Kubernetes API as the backing datastore.
- name: DATASTORE_TYPE
value: "kubernetes"
# Wait for the datastore.
- name: WAIT_FOR_DATASTORE
value: "true"
# Set based on the k8s node name.
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
# Don't enable BGP.
- name: CALICO_NETWORKING_BACKEND
value: "none"
# Cluster type to identify the deployment type
- name: CLUSTER_TYPE
value: "k8s,canal"
# Period, in seconds, at which felix re-applies all iptables state
- name: FELIX_IPTABLESREFRESHINTERVAL
value: "60"
# No IP address needed.
- name: IP
value: ""
# The default IPv4 pool to create on startup if none exists. Pod IPs will be
# chosen from this range. Changing this value after installation will have
# no effect. This should fall within --cluster-cidr.
- name: CALICO_IPV4POOL_CIDR
value: "192.168.0.0/16"
# Disable file logging so kubectl logs works.
- name: CALICO_DISABLE_FILE_LOGGING
value: "true"
# Set Felix endpoint to host default action to ACCEPT.
- name: FELIX_DEFAULTENDPOINTTOHOSTACTION
value: "ACCEPT"
# Disable IPv6 on Kubernetes.
- name: FELIX_IPV6SUPPORT
value: "false"
# Disable felix logging to file
- name: FELIX_LOGFILEPATH
value: "none"
# Disable felix logging for syslog
- name: FELIX_LOGSEVERITYSYS
value: ""
# Enable felix logging to stdout
- name: FELIX_LOGSEVERITYSCREEN
value: "Warning"
- name: FELIX_HEALTHENABLED
value: "true"
securityContext:
privileged: true
resources:
requests:
cpu: 250m
livenessProbe:
httpGet:
path: /liveness
port: 9099
host: localhost
periodSeconds: 10
initialDelaySeconds: 10
failureThreshold: 6
readinessProbe:
httpGet:
path: /readiness
port: 9099
host: localhost
periodSeconds: 10
volumeMounts:
- mountPath: /lib/modules
name: lib-modules
readOnly: true
- mountPath: /run/xtables.lock
name: xtables-lock
readOnly: false
- mountPath: /var/run/calico
name: var-run-calico
readOnly: false
- mountPath: /var/lib/calico
name: var-lib-calico
readOnly: false
# This container runs flannel using the kube-subnet-mgr backend
# for allocating subnets.
- name: kube-flannel
image: {{.CanalFlannelImg}}
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
- name: FLANNELD_IFACE
valueFrom:
configMapKeyRef:
name: canal-config
key: canal_iface
- name: FLANNELD_IP_MASQ