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|
// util.libsonnet provides a number of useful (opinionated) shortcuts to replace boilerplate code
local util(k) = {
// mapToFlags converts a map to a set of golang-style command line flags.
mapToFlags(map, prefix='-'): [
'%s%s=%s' % [prefix, key, map[key]]
for key in std.objectFields(map)
if map[key] != null
],
// serviceFor create service for a given deployment.
serviceFor(deployment, ignored_labels=[], nameFormat='%(container)s-%(port)s')::
local container = k.core.v1.container;
local service = k.core.v1.service;
local servicePort = k.core.v1.servicePort;
local ports = [
servicePort.newNamed(
name=(nameFormat % { container: c.name, port: port.name }),
port=port.containerPort,
targetPort=port.containerPort
) +
if std.objectHas(port, 'protocol')
then servicePort.withProtocol(port.protocol)
else {}
for c in deployment.spec.template.spec.containers
for port in (c + container.withPortsMixin([])).ports
];
local labels = {
[x]: deployment.spec.template.metadata.labels[x]
for x in std.objectFields(deployment.spec.template.metadata.labels)
if std.count(ignored_labels, x) == 0
};
service.new(
deployment.metadata.name, // name
labels, // selector
ports,
) +
service.mixin.metadata.withLabels({ name: deployment.metadata.name }),
// rbac creates a service account, role and role binding with the given
// name and rules.
rbac(name, rules, namespace):: {
local clusterRole = k.rbac.v1.clusterRole,
local clusterRoleBinding = k.rbac.v1.clusterRoleBinding,
local subject = k.rbac.v1.subject,
local serviceAccount = k.core.v1.serviceAccount,
service_account:
serviceAccount.new(name),
cluster_role:
clusterRole.new() +
clusterRole.mixin.metadata.withName(name) +
clusterRole.withRules(rules),
cluster_role_binding:
clusterRoleBinding.new() +
clusterRoleBinding.mixin.metadata.withName(name) +
clusterRoleBinding.mixin.roleRef.withApiGroup('rbac.authorization.k8s.io') +
clusterRoleBinding.mixin.roleRef.withKind('ClusterRole') +
clusterRoleBinding.mixin.roleRef.withName(name) +
clusterRoleBinding.withSubjects([
subject.new() +
subject.withKind('ServiceAccount') +
subject.withName(name) +
subject.withNamespace(namespace),
]),
},
namespacedRBAC(name, rules, namespace):: {
local role = k.rbac.v1.role,
local roleBinding = k.rbac.v1.roleBinding,
local subject = k.rbac.v1.subject,
local serviceAccount = k.core.v1.serviceAccount,
service_account:
serviceAccount.new(name) +
serviceAccount.mixin.metadata.withNamespace(namespace),
role:
role.new() +
role.mixin.metadata.withName(name) +
role.mixin.metadata.withNamespace(namespace) +
role.withRules(rules),
role_binding:
roleBinding.new() +
roleBinding.mixin.metadata.withName(name) +
roleBinding.mixin.metadata.withNamespace(namespace) +
roleBinding.mixin.roleRef.withApiGroup('rbac.authorization.k8s.io') +
roleBinding.mixin.roleRef.withKind('Role') +
roleBinding.mixin.roleRef.withName(name) +
roleBinding.withSubjects([
subject.new() +
subject.withKind('ServiceAccount') +
subject.withName(name) +
subject.withNamespace(namespace),
]),
},
// VolumeMount helper functions can be augmented with mixins.
// For example, passing "volumeMount.withSubPath(subpath)" will result in
// a subpath mixin.
configVolumeMount(name, path, volumeMountMixin={})::
local container = k.core.v1.container,
deployment = k.apps.v1.deployment,
volumeMount = k.core.v1.volumeMount,
volume = k.core.v1.volume,
addMount(c) = c + container.withVolumeMountsMixin(
volumeMount.new(name, path) +
volumeMountMixin,
);
deployment.mapContainers(addMount) +
deployment.mixin.spec.template.spec.withVolumesMixin([
volume.fromConfigMap(name, name),
]),
// configMapVolumeMount adds a configMap to deployment-like objects.
// It will also add an annotation hash to ensure the pods are re-deployed
// when the config map changes.
configMapVolumeMount(configMap, path, volumeMountMixin={})::
local name = configMap.metadata.name,
hash = std.md5(std.toString(configMap)),
container = k.core.v1.container,
deployment = k.apps.v1.deployment,
volumeMount = k.core.v1.volumeMount,
volume = k.core.v1.volume,
addMount(c) = c + container.withVolumeMountsMixin(
volumeMount.new(name, path) +
volumeMountMixin,
);
deployment.mapContainers(addMount) +
deployment.mixin.spec.template.spec.withVolumesMixin([
volume.fromConfigMap(name, name),
]) +
deployment.mixin.spec.template.metadata.withAnnotationsMixin({
['%s-hash' % name]: hash,
}),
hostVolumeMount(name, hostPath, path, readOnly=false, volumeMountMixin={})::
local container = k.core.v1.container,
deployment = k.apps.v1.deployment,
volumeMount = k.core.v1.volumeMount,
volume = k.core.v1.volume,
addMount(c) = c + container.withVolumeMountsMixin(
volumeMount.new(name, path, readOnly=readOnly) +
volumeMountMixin,
);
deployment.mapContainers(addMount) +
deployment.mixin.spec.template.spec.withVolumesMixin([
volume.fromHostPath(name, hostPath),
]),
pvcVolumeMount(pvcName, path, readOnly=false, volumeMountMixin={})::
local container = k.core.v1.container,
deployment = k.apps.v1.deployment,
volumeMount = k.core.v1.volumeMount,
volume = k.core.v1.volume,
addMount(c) = c + container.withVolumeMountsMixin(
volumeMount.new(pvcName, path, readOnly=readOnly) +
volumeMountMixin,
);
deployment.mapContainers(addMount) +
deployment.mixin.spec.template.spec.withVolumesMixin([
volume.fromPersistentVolumeClaim(pvcName, pvcName),
]),
secretVolumeMount(name, path, defaultMode=256, volumeMountMixin={})::
local container = k.core.v1.container,
deployment = k.apps.v1.deployment,
volumeMount = k.core.v1.volumeMount,
volume = k.core.v1.volume,
addMount(c) = c + container.withVolumeMountsMixin(
volumeMount.new(name, path) +
volumeMountMixin,
);
deployment.mapContainers(addMount) +
deployment.mixin.spec.template.spec.withVolumesMixin([
volume.fromSecret(name, secretName=name) +
volume.mixin.secret.withDefaultMode(defaultMode),
]),
emptyVolumeMount(name, path, volumeMountMixin={}, volumeMixin={})::
local container = k.core.v1.container,
deployment = k.apps.v1.deployment,
volumeMount = k.core.v1.volumeMount,
volume = k.core.v1.volume,
addMount(c) = c + container.withVolumeMountsMixin(
volumeMount.new(name, path) +
volumeMountMixin,
);
deployment.mapContainers(addMount) +
deployment.mixin.spec.template.spec.withVolumesMixin([
volume.fromEmptyDir(name) + volumeMixin,
]),
manifestYaml(value):: (
local f = std.native('manifestYamlFromJson');
f(std.toString(value))
),
resourcesRequests(cpu, memory)::
k.core.v1.container.mixin.resources.withRequests(
(if cpu != null
then { cpu: cpu }
else {}) +
(if memory != null
then { memory: memory }
else {})
),
resourcesLimits(cpu, memory)::
k.core.v1.container.mixin.resources.withLimits(
(if cpu != null
then { cpu: cpu }
else {}) +
(if memory != null
then { memory: memory }
else {})
),
antiAffinity:
{
local deployment = k.apps.v1.deployment,
local podAntiAffinity = deployment.mixin.spec.template.spec.affinity.podAntiAffinity,
local name = super.spec.template.metadata.labels.name,
spec+: podAntiAffinity.withRequiredDuringSchedulingIgnoredDuringExecution([
podAntiAffinity.requiredDuringSchedulingIgnoredDuringExecutionType.new() +
podAntiAffinity.requiredDuringSchedulingIgnoredDuringExecutionType.mixin.labelSelector.withMatchLabels({ name: name }) +
podAntiAffinity.requiredDuringSchedulingIgnoredDuringExecutionType.withTopologyKey('kubernetes.io/hostname'),
]).spec,
},
antiAffinityStatefulSet:
{
local statefulSet = k.apps.v1.statefulSet,
local podAntiAffinity = statefulSet.mixin.spec.template.spec.affinity.podAntiAffinity,
local name = super.spec.template.metadata.labels.name,
spec+: podAntiAffinity.withRequiredDuringSchedulingIgnoredDuringExecution([
podAntiAffinity.requiredDuringSchedulingIgnoredDuringExecutionType.new() +
podAntiAffinity.requiredDuringSchedulingIgnoredDuringExecutionType.mixin.labelSelector.withMatchLabels({ name: name }) +
podAntiAffinity.requiredDuringSchedulingIgnoredDuringExecutionType.withTopologyKey('kubernetes.io/hostname'),
]).spec,
},
// Add a priority to the pods in a deployment (or deployment-like objects
// such as a statefulset).
local deployment = k.apps.v1.deployment,
podPriority(p):
deployment.mixin.spec.template.spec.withPriorityClassName(p),
};
util((import 'grafana.libsonnet')) + {
withK(k):: util(k),
}
|
