From a6a0027a3cd3da380479642debb202f2722710ee Mon Sep 17 00:00:00 2001
From: Kemal Akkoyun <kakkoyun@users.noreply.github.com>
Date: Tue, 1 Sep 2020 18:43:47 +0300
Subject: [PATCH] querier: Add lookback delta for querier (#145)

* Add lookback delta for querier

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Add changelog entry

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>
---
 CHANGELOG.md                                  |  1 +
 all.jsonnet                                   |  2 ++
 .../manifests/thanos-query-deployment.yaml    |  1 +
 .../kube-thanos/kube-thanos-query.libsonnet   | 24 +++++++++++++++++++
 4 files changed, 28 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62bc6e4b..717331ba 100644
--- a/CHANGELOG.md
+++ b/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
 
diff --git a/all.jsonnet b/all.jsonnet
index 706a989b..273e22e1 100644
--- a/all.jsonnet
+++ b/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',
     },
   };
 
diff --git a/examples/all/manifests/thanos-query-deployment.yaml b/examples/all/manifests/thanos-query-deployment.yaml
index 0e1cff95..77564c49 100644
--- a/examples/all/manifests/thanos-query-deployment.yaml
+++ b/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
diff --git a/jsonnet/kube-thanos/kube-thanos-query.libsonnet b/jsonnet/kube-thanos/kube-thanos-query.libsonnet
index 3866d996..d3232bc3 100644
--- a/jsonnet/kube-thanos/kube-thanos-query.libsonnet
+++ b/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
+            ],
+          },
+        },
+      },
+    },
+  },
 }