Add snapshot builder

Bug: 723130
Change-Id: I9356bf40bb925b3b78495d0fe6de213d215e5962
Reviewed-on: https://chromium-review.googlesource.com/1232890Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: smut <smut@google.com>
Cr-Commit-Position: refs/heads/master@{#592559}

infra/config/global/cr-buildbucket-dev.cfg

@@ -7,8 +7,8 @@
 # Please keep this list sorted by bucket name.
 
 acl_sets {
-  # This is pure-LUCI CI w/o buildbot.
-  name: "ci"
+  # This is pure-LUCI w/o buildbot.
+  name: "default"
   acls {
     role: READER
     group: "all"
@@ -17,16 +17,6 @@ acl_sets {
     role: SCHEDULER
     identity: "luci-scheduler-dev@appspot.gserviceaccount.com"
   }
-  acls {
-    role: SCHEDULER
-    # Support builder triggering other builders in the same bucket.
-    identity: "chromium-ci-builder-dev@chops-service-accounts.iam.gserviceaccount.com"
-  }
-  acls {
-    # Allow task force to bump next build number.
-    role: WRITER
-    group: "google/luci-task-force@google.com"
-  }
 }
 
 builder_mixins {
@@ -40,7 +30,17 @@ builder_mixins {
 buckets {
   name: "luci.chromium.ci"
 
-  acl_sets: "ci"
+  acl_sets: "default"
+  acls {
+    role: SCHEDULER
+    # Support builder triggering other builders in the same bucket.
+    identity: "chromium-ci-builder-dev@chops-service-accounts.iam.gserviceaccount.com"
+  }
+  acls {
+    # Allow task force to bump next build number.
+    role: WRITER
+    group: "google/luci-task-force@google.com"
+  }
 
   swarming {
     hostname: "chromium-swarm-dev.appspot.com"
@@ -89,3 +89,23 @@ buckets {
     }
   }
 }
+
+buckets {
+    name: "luci.chromium.cron"
+    acl_sets: "default"
+
+    swarming {
+      hostname: "chromium-swarm-dev.appspot.com"
+
+      builders {
+        name: "Snapshot Builder"
+        dimensions: "os:Ubuntu-14.04"
+        execution_timeout_secs: 3600
+        recipe {
+          cipd_package: "infra/recipe_bundles/chromium.googlesource.com/infra/infra"
+          cipd_version: "refs/heads/master"
+          name: "snapshot"
+        }
+      }
+    }
+}

infra/config/global/luci-milo-dev.cfg

@@ -170,3 +170,14 @@ consoles {
     name: "buildbucket/luci.chromium.ci/Windows Swarm"
   }
 }
+
+consoles {
+  id: "snapshots"
+  builder_view_only: true
+  header_id: "chromium"
+  manifest_name: "REVISION"
+  name: "Snapshot Builder"
+  builders {
+    name: "buildbucket/luci.chromium.cron/Snapshot Builder"
+  }
+}

infra/config/global/luci-scheduler-dev.cfg

@@ -94,3 +94,18 @@ job {
     builder: "Windows Swarm"
   }
 }
+
+################################################################################
+# Cron jobs
+
+job {
+  id: "Snapshot Builder"
+  acl_sets: "default"
+  buildbucket {
+    bucket: "luci.chromium.cron"
+    builder: "Snapshot Builder"
+    server: "cr-buildbucket-dev.appspot.com"
+  }
+  # TODO(smut): Adjust frequency.
+  schedule: "with 300s interval"
+}