querier: Add lookback delta for querier (#145)

* Add lookback delta for querier

Signed-off-by: Kemal Akkoyun <[email protected]>

* Add changelog entry

Signed-off-by: Kemal Akkoyun <[email protected]>

Author: kakkoyun

CHANGELOG.md

@@ -18,6 +18,7 @@ We use *breaking* word for marking changes that are not backward compatible (rel
 ### Added
 
 - [#142](https://github.com/thanos-io/kube-thanos/pull/142) query-frontend: Add thanos query frontend component.
+- [#145](https://github.com/thanos-io/kube-thanos/pull/145) querier: Add a new mixin to specify `--query.lookback-delta` flag.
 
 ### Fixed
 

all.jsonnet

@@ -103,6 +103,7 @@ local q =
   t.query +
   t.query.withServiceMonitor +
   t.query.withQueryTimeout +
+  t.query.withLookbackDelta +
   commonConfig + {
     config+:: {
       name: 'thanos-query',
@@ -113,6 +114,7 @@ local q =
       ],
       replicaLabels: ['prometheus_replica', 'rule_replica'],
       queryTimeout: '5m',
+      lookbackDelta: '15m',
     },
   };
 

examples/all/manifests/thanos-query-deployment.yaml

@@ -49,6 +49,7 @@ spec:
         - --store=dnssrv+_grpc._tcp.thanos-rule.thanos.svc.cluster.local
         - --store=dnssrv+_grpc._tcp.thanos-store.thanos.svc.cluster.local
         - --query.timeout=5m
+        - --query.lookback-delta=15m
         image: quay.io/thanos/thanos:master-2020-08-11-2ea2c2b7
         livenessProbe:
           failureThreshold: 4

jsonnet/kube-thanos/kube-thanos-query.libsonnet

@@ -195,4 +195,28 @@ local k = import 'ksonnet/ksonnet.beta.4/k.libsonnet';
       },
     },
   },
+
+  withLookbackDelta:: {
+    local tq = self,
+    config+:: {
+      lookbackDelta: error 'must provide lookbackDelta',
+    },
+
+    deployment+: {
+      spec+: {
+        template+: {
+          spec+: {
+            containers: [
+              if c.name == 'thanos-query' then c {
+                args+: [
+                  '--query.lookback-delta=' + tq.config.lookbackDelta,
+                ],
+              } else c
+              for c in super.containers
+            ],
+          },
+        },
+      },
+    },
+  },
 }