Merge PR #26489 into master

* refs/pull/26489/head:
	qa/standalone/osd/osd-markdown: disable CLI command dups

Reviewed-by: xie xingguo <xie.xingguo@zte.com.cn>

qa/standalone/osd/osd-markdown.sh

@@ -45,7 +45,10 @@ function markdown_N_impl() {
     ceph osd tree
     ceph osd tree | grep osd.0 |grep up || return 1
     # mark the OSD down.
-    ceph osd down 0
+    # override any dup setting in the environment to ensure we do this
+    # exactly once (modulo messenger failures, at least; we can't *actually*
+    # provide exactly-once semantics for mon commands).
+    CEPH_CLI_TEST_DUP_COMMAND=0 ceph osd down 0
     sleep $sleeptime
   done
 }