Support stateless Ruler

CHANGELOG.md

@@ -19,6 +19,8 @@ We use *breaking* word for marking changes that are not backward compatible (rel
 
 ### Added
 
+- [#263](https://github.com/thanos-io/kube-thanos/pull/263) Add support for stateless Rulers.
+
 ### Fixed
 
 -

all.jsonnet

@@ -93,6 +93,10 @@ local ru = t.rule(commonConfig {
     name: 'thanos-ruler-config',
     key: 'config.yaml',
   },
+  remoteWriteConfigFile: {
+    name: 'thanos-stateless-ruler-config',
+    key: 'rw-config.yaml',
+  },
   reloaderImage: 'jimmidyson/configmap-reload:v0.5.0',
   serviceMonitor: true,
 });

examples/all/manifests/thanos-rule-statefulSet.yaml

@@ -47,6 +47,7 @@ spec:
             "sampler_type": "ratelimiting"
             "service_name": "thanos-rule"
           "type": "JAEGER"
+        - --remote-write.config-file=/etc/thanos/config/thanos-stateless-ruler-config/rw-config.yaml
         env:
         - name: NAME
           valueFrom:
@@ -103,10 +104,14 @@ spec:
         - mountPath: /etc/thanos/config/thanos-ruler-config
           name: thanos-ruler-config
           readOnly: true
+        - mountPath: /etc/thanos/config/thanos-stateless-ruler-config
+          name: thanos-stateless-ruler-config
+          readOnly: true
       - args:
         - -webhook-url=http://localhost:10902/-/reload
         - -volume-dir=/etc/thanos/rules/test
         - -volume-dir=/etc/thanos/config/thanos-ruler-config
+        - -volume-dir=/etc/thanos/config/thanos-stateless-ruler-config
         image: jimmidyson/configmap-reload:v0.5.0
         imagePullPolicy: IfNotPresent
         name: configmap-reloader
@@ -115,6 +120,8 @@ spec:
           name: test
         - mountPath: /etc/thanos/config/thanos-ruler-config
           name: thanos-ruler-config
+        - mountPath: /etc/thanos/config/thanos-stateless-ruler-config
+          name: thanos-stateless-ruler-config
       nodeSelector:
         kubernetes.io/os: linux
       securityContext:
@@ -128,6 +135,9 @@ spec:
       - configMap:
           name: thanos-ruler-config
         name: thanos-ruler-config
+      - configMap:
+          name: thanos-stateless-ruler-config
+        name: thanos-stateless-ruler-config
   volumeClaimTemplates:
   - metadata:
       labels:

jsonnet/kube-thanos/kube-thanos-rule.libsonnet

@@ -14,6 +14,7 @@ local defaults = {
   objectStorageConfig: error 'must provide objectStorageConfig',
   ruleFiles: [],
   rulesConfig: [],
+  remoteWriteConfigFile: {},
   alertmanagersURLs: [],
   alertmanagerConfigFile: {},
   extraVolumeMounts: [],
@@ -60,6 +61,7 @@ function(params) {
   assert std.isNumber(tr.config.replicas) && tr.config.replicas >= 0 : 'thanos rule replicas has to be number >= 0',
   assert std.isArray(tr.config.ruleFiles),
   assert std.isArray(tr.config.rulesConfig),
+  assert std.isObject(tr.config.remoteWriteConfigFile),
   assert std.isArray(tr.config.alertmanagersURLs),
   assert std.isObject(tr.config.alertmanagerConfigFile),
   assert std.isArray(tr.config.extraVolumeMounts),
@@ -143,6 +145,11 @@ function(params) {
               { config+: { service_name: defaults.name } } + tr.config.tracing
             ),
           ] else []
+        ) + (
+          if tr.config.remoteWriteConfigFile != {} then [
+            '--remote-write.config-file=/etc/thanos/config/' + tr.config.remoteWriteConfigFile.name + '/' + tr.config.remoteWriteConfigFile.key,
+          ]
+          else []
         ),
       env: [
         { name: 'NAME', valueFrom: { fieldRef: { fieldPath: 'metadata.name' } } },
@@ -188,6 +195,10 @@ function(params) {
         if tr.config.objectStorageConfig != null && std.objectHas(tr.config.objectStorageConfig, 'tlsSecretName') && std.length(tr.config.objectStorageConfig.tlsSecretName) > 0 then [
           { name: 'tls-secret', mountPath: tr.config.objectStorageConfig.tlsSecretMountPath },
         ] else []
+      ) + (
+        if tr.config.remoteWriteConfigFile != {} then [
+          { name: tr.config.remoteWriteConfigFile.name, mountPath: '/etc/thanos/config/' + tr.config.remoteWriteConfigFile.name, readOnly: true },
+        ] else []
       ),
       livenessProbe: { failureThreshold: 24, periodSeconds: 5, httpGet: {
         scheme: 'HTTP',
@@ -226,6 +237,10 @@ function(params) {
             '-volume-dir=' + volumeMount.mountPath
             for volumeMount in tr.config.extraVolumeMounts
           ] else []
+        ) + (
+          if tr.config.remoteWriteConfigFile != {} then [
+            '-volume-dir=/etc/thanos/config/' + tr.config.remoteWriteConfigFile.name,
+          ] else []
         ),
       volumeMounts: [
         { name: ruleConfig.name, mountPath: '/etc/thanos/rules/' + ruleConfig.name }
@@ -239,6 +254,10 @@ function(params) {
           { name: volumeMount.name, mountPath: volumeMount.mountPath }
           for volumeMount in tr.config.extraVolumeMounts
         ] else []
+      ) + (
+        if tr.config.remoteWriteConfigFile != {} then [
+          { name: tr.config.remoteWriteConfigFile.name, mountPath: '/etc/thanos/config/' + tr.config.remoteWriteConfigFile.name },
+        ] else []
       ),
     };
 
@@ -263,7 +282,7 @@ function(params) {
             securityContext: tr.config.securityContext,
             containers: [c] +
                         (
-                          if std.length(tr.config.rulesConfig) > 0 || std.length(tr.config.extraVolumeMounts) > 0 || tr.config.alertmanagerConfigFile != {} then [
+                          if std.length(tr.config.rulesConfig) > 0 || std.length(tr.config.extraVolumeMounts) > 0 || tr.config.alertmanagerConfigFile != {} || tr.config.remoteWriteConfigFile != {} then [
                             reloadContainer,
                           ] else []
                         ),
@@ -279,6 +298,11 @@ function(params) {
                   name: tr.config.alertmanagerConfigFile.name,
                   configMap: { name: tr.config.alertmanagerConfigFile.name },
                 }] else []
+              ) + (
+                if tr.config.remoteWriteConfigFile != {} then [{
+                  name: tr.config.remoteWriteConfigFile.name,
+                  configMap: { name: tr.config.remoteWriteConfigFile.name },
+                }] else []
               ) + (
                 if std.length(tr.config.extraVolumeMounts) > 0 then [
                   { name: volumeMount.name } +