cockroach: v20.2 -> v21.1

Following https://www.cockroachlabs.com/docs/v21.1/upgrade-cockroach-version?filters=linux
--logtostderr is deprecated/removed, but AFAICT from the default config
it will still log there: https://www.cockroachlabs.com/docs/v21.1/configure-logs#default-logging-configuration

Change-Id: I7fb3f835693f955b37de24dc581140ea34b11630
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1461
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/cluster/kube/lib/cockroachdb.libsonnet b/cluster/kube/lib/cockroachdb.libsonnet
index dff2ebd..f5dbc9b 100644
--- a/cluster/kube/lib/cockroachdb.libsonnet
+++ b/cluster/kube/lib/cockroachdb.libsonnet
@@ -42,7 +42,7 @@
         local cluster = self,
 
         cfg:: {
-            image: "cockroachdb/cockroach:v20.2.4",
+            image: "cockroachdb/cockroach:v21.1.21",
 
             # Must be unique per cluster.
             portServe: 26257,
@@ -290,7 +290,6 @@
                                         },
                                         command: [
                                             "/cockroach/cockroach", "start",
-                                            "--logtostderr",
                                             "--certs-dir", "/cockroach/cockroach-certs",
                                             "--advertise-host", "%s.cluster.local" % server.service.host, 
                                             "--cache", "25%", "--max-sql-memory", "25%",