Having kubernetes' default search domains in dockerd is hazardous,

solsson · solsson · commit b892f7a79a9d · 2020-07-28T13:19:05.000+02:00
in particular in combination with docker-compose where you typically
adress services using a short name only.
Enforce the use of full DNS names.
diff --git a/docker/daemon.json b/docker/daemon.json
@@ -4,6 +4,7 @@
     "prod-registry.ystack.svc.cluster.local"
   ],
   "tls": false,
+  "dns-search": ["."],
   "hosts": [
     "tcp://0.0.0.0:2376"
   ]

Original file line number	Diff line number	Diff line change
`@@ -4,6 +4,7 @@`
`4`	`4`	`"prod-registry.ystack.svc.cluster.local"`
`5`	`5`	`],`
`6`	`6`	`"tls": false,`
	`7`	`+ "dns-search": ["."],`
`7`	`8`	`"hosts": [`
`8`	`9`	`"tcp://0.0.0.0:2376"`
`9`	`10`	`]`