Task #9346: Check data location for docker data on head nodes

.gitattributes

@@ -5476,6 +5476,7 @@ SubSystems/Online_Cobalt/test/tstartBGL.in_parset -text
 SubSystems/Online_Cobalt/test/tstartBGL.run eol=lf
 SubSystems/Online_Cobalt/test/tstartBGL.sh eol=lf
 SubSystems/Online_Cobalt/validation/cep4/docker/9311-cgroupdriver.test -text
+SubSystems/Online_Cobalt/validation/cep4/docker/datalocation.test -text
 SubSystems/Online_Cobalt/validation/cep4/lofarsys/docker.root.test -text
 SubSystems/Online_Cobalt/validation/cep4/lofarsys/ssh_localhost.root.test -text
 SubSystems/Online_Cobalt/validation/cep4/network/9228-ipoib.test -text

SubSystems/Online_Cobalt/validation/cep4/docker/datalocation.test

+#/bin/bash -e
+
+# Test for location of Docker's data: head nodes need to use /localdata/docker
+
+[[ `hostname` =~ "head" ]] || exit 0
+
+# Docker startup line must contain "--graph=/localdata/docker"
+fgrep "ExecStart" /usr/lib/systemd/system/docker.service | fgrep -- "--graph=/localdata/docker" || exit 1
+