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allow creation of role and rolebindings for other namespaces in jsonnet

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replaced default namespaces rbac rules by a loop


set right variable name
This commit is contained in:
prune
2018-07-27 07:48:17 -04:00
parent aee5d45255
commit fc382e15cd
2 changed files with 51 additions and 71 deletions
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28
docs/monitoring-other-namespaces.md Normal file
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@@ -0,0 +1,28 @@
# Monitoring other Kubernetes Namespaces
This guide will help you monitor applications in other Namespaces. By default the RBAC rules are only enabled for the `Default` and `kube-system` Namespace during Install.
# Setup
You have to give the list of the Namespaces that you want to be able to monitor.
This is done in the variable `prometheus.roleSpecificNamespaces`. You usually set this in your `.jsonnet` file when building the manifests.
Ex to create the needed `Role` and `Rolebindig` for the Namespace `foo` :
```
local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') + {
_config+:: {
namespace: 'monitoring',
prometheus+:: {
namespaces: ["default", "kube-system","foo"],
},
},
};
{ ['00namespace-' + name]: kp.kubePrometheus[name] for name in std.objectFields(kp.kubePrometheus) } +
{ ['0prometheus-operator-' + name]: kp.prometheusOperator[name] for name in std.objectFields(kp.prometheusOperator) } +
{ ['node-exporter-' + name]: kp.nodeExporter[name] for name in std.objectFields(kp.nodeExporter) } +
{ ['kube-state-metrics-' + name]: kp.kubeStateMetrics[name] for name in std.objectFields(kp.kubeStateMetrics) } +
{ ['alertmanager-' + name]: kp.alertmanager[name] for name in std.objectFields(kp.alertmanager) } +
{ ['prometheus-' + name]: kp.prometheus[name] for name in std.objectFields(kp.prometheus) } +
{ ['grafana-' + name]: kp.grafana[name] for name in std.objectFields(kp.grafana) }
```

90
jsonnet/kube-prometheus/prometheus/prometheus.libsonnet
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@@ -21,6 +21,7 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
replicas: 2,
rules: {},
renderedRules: {},
namespaces: ["default", "kube-system",$._config.namespace],
},
},
@@ -55,16 +56,20 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
groups: $._config.prometheus.rules.groups,
},
},
roleBindingDefault:
roleBindingSpecificNamespace:
local roleBinding = k.rbac.v1.roleBinding;
roleBinding.new() +
roleBinding.mixin.metadata.withName('prometheus-' + $._config.prometheus.name) +
roleBinding.mixin.metadata.withNamespace('default') +
roleBinding.mixin.roleRef.withApiGroup('rbac.authorization.k8s.io') +
roleBinding.mixin.roleRef.withName('prometheus-' + $._config.prometheus.name) +
roleBinding.mixin.roleRef.mixinInstance({ kind: 'Role' }) +
roleBinding.withSubjects([{ kind: 'ServiceAccount', name: 'prometheus-' + $._config.prometheus.name, namespace: $._config.namespace }]),
local newSpecificRoleBinding(namespace) =
roleBinding.new() +
roleBinding.mixin.metadata.withName('prometheus-' + $._config.prometheus.name) +
roleBinding.mixin.metadata.withNamespace(namespace) +
roleBinding.mixin.roleRef.withApiGroup('rbac.authorization.k8s.io') +
roleBinding.mixin.roleRef.withName('prometheus-' + $._config.prometheus.name) +
roleBinding.mixin.roleRef.mixinInstance({ kind: 'Role' }) +
roleBinding.withSubjects([{ kind: 'ServiceAccount', name: 'prometheus-' + $._config.prometheus.name, namespace: namespace }]);
local roleBindigList = k.rbac.v1.roleBindingList;
roleBindigList.new([newSpecificRoleBinding(x) for x in $._config.prometheus.namespaces]),
clusterRole:
local clusterRole = k.rbac.v1.clusterRole;
local policyRule = clusterRole.rulesType;
@@ -108,16 +113,6 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
roleBinding.mixin.roleRef.withName('prometheus-' + $._config.prometheus.name + '-config') +
roleBinding.mixin.roleRef.mixinInstance({ kind: 'Role' }) +
roleBinding.withSubjects([{ kind: 'ServiceAccount', name: 'prometheus-' + $._config.prometheus.name, namespace: $._config.namespace }]),
roleBindingNamespace:
local roleBinding = k.rbac.v1.roleBinding;
roleBinding.new() +
roleBinding.mixin.metadata.withName('prometheus-' + $._config.prometheus.name) +
roleBinding.mixin.metadata.withNamespace($._config.namespace) +
roleBinding.mixin.roleRef.withApiGroup('rbac.authorization.k8s.io') +
roleBinding.mixin.roleRef.withName('prometheus-' + $._config.prometheus.name) +
roleBinding.mixin.roleRef.mixinInstance({ kind: 'Role' }) +
roleBinding.withSubjects([{ kind: 'ServiceAccount', name: 'prometheus-' + $._config.prometheus.name, namespace: $._config.namespace }]),
clusterRoleBinding:
local clusterRoleBinding = k.rbac.v1.clusterRoleBinding;
@@ -127,10 +122,9 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
clusterRoleBinding.mixin.roleRef.withName('prometheus-' + $._config.prometheus.name) +
clusterRoleBinding.mixin.roleRef.mixinInstance({ kind: 'ClusterRole' }) +
clusterRoleBinding.withSubjects([{ kind: 'ServiceAccount', name: 'prometheus-' + $._config.prometheus.name, namespace: $._config.namespace }]),
roleKubeSystem:
roleSpecificNamespace:
local role = k.rbac.v1.role;
local policyRule = role.rulesType;
local coreRule = policyRule.new() +
policyRule.withApiGroups(['']) +
policyRule.withResources([
@@ -141,56 +135,14 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
]) +
policyRule.withVerbs(['get', 'list', 'watch']);
role.new() +
role.mixin.metadata.withName('prometheus-' + $._config.prometheus.name) +
role.mixin.metadata.withNamespace('kube-system') +
role.withRules(coreRule),
roleDefault:
local role = k.rbac.v1.role;
local policyRule = role.rulesType;
local newSpecificRole(namespace) =
role.new() +
role.mixin.metadata.withName('prometheus-' + $._config.prometheus.name) +
role.mixin.metadata.withNamespace(namespace) +
role.withRules(coreRule);
local coreRule = policyRule.new() +
policyRule.withApiGroups(['']) +
policyRule.withResources([
'nodes',
'services',
'endpoints',
'pods',
]) +
policyRule.withVerbs(['get', 'list', 'watch']);
role.new() +
role.mixin.metadata.withName('prometheus-' + $._config.prometheus.name) +
role.mixin.metadata.withNamespace('default') +
role.withRules(coreRule),
roleBindingKubeSystem:
local roleBinding = k.rbac.v1.roleBinding;
roleBinding.new() +
roleBinding.mixin.metadata.withName('prometheus-' + $._config.prometheus.name) +
roleBinding.mixin.metadata.withNamespace('kube-system') +
roleBinding.mixin.roleRef.withApiGroup('rbac.authorization.k8s.io') +
roleBinding.mixin.roleRef.withName('prometheus-' + $._config.prometheus.name) +
roleBinding.mixin.roleRef.mixinInstance({ kind: 'Role' }) +
roleBinding.withSubjects([{ kind: 'ServiceAccount', name: 'prometheus-' + $._config.prometheus.name, namespace: $._config.namespace }]),
roleNamespace:
local role = k.rbac.v1.role;
local policyRule = role.rulesType;
local coreRule = policyRule.new() +
policyRule.withApiGroups(['']) +
policyRule.withResources([
'nodes',
'services',
'endpoints',
'pods',
]) +
policyRule.withVerbs(['get', 'list', 'watch']);
role.new() +
role.mixin.metadata.withName('prometheus-' + $._config.prometheus.name) +
role.mixin.metadata.withNamespace($._config.namespace) +
role.withRules(coreRule),
local roleList = k.rbac.v1.roleList;
roleList.new([newSpecificRole(x) for x in $._config.prometheus.namespaces]),
prometheus:
local container = k.core.v1.pod.mixin.spec.containersType;
local resourceRequirements = container.mixin.resourcesType;