qa/standalone/crush/crush-choose-args: add weight-set tests

Verify we have the expected behavior for creates and moves that
maintain bucket summation, both with and without the
osd_crush_update_weight_set option enabled.

Signed-off-by: Sage Weil <sage@redhat.com>

qa/standalone/crush/crush-choose-args.sh

@@ -159,6 +159,83 @@ EOF
     CEPH_ARGS="$ORIG_CEPH_ARGS"
 }
 
+function TEST_reweight() {
+    # reweight and reweight-compat behave appropriately
+    local dir=$1
+
+    ORIG_CEPH_ARGS="$CEPH_ARGS"
+    CEPH_ARGS+="--osd-crush-update-weight-set=false "
+
+    run_mon $dir a || return 1
+    run_mgr $dir x || return 1
+    run_osd $dir 0 || return 1
+    run_osd $dir 1 || return 1
+
+    ceph osd crush weight-set create-compat || return 1
+    ceph osd crush tree
+
+    ceph osd crush weight-set reweight-compat osd.0 2 || return 1
+    ceph osd crush tree
+    ceph osd crush tree | grep host | grep '6.00000  5.00000' || return 1
+
+    run_osd $dir 2 || return 1
+    ceph osd crush tree
+    ceph osd crush tree | grep host | grep '9.00000  5.00000' || return 1
+
+    ceph osd crush reweight osd.2 4
+    ceph osd crush tree
+    ceph osd crush tree | grep host | grep '10.00000  5.00000' || return 1
+
+    ceph osd crush weight-set reweight-compat osd.2 4
+    ceph osd crush tree
+    ceph osd crush tree | grep host | grep '10.00000  9.00000' || return 1
+}
+
+function TEST_move_bucket() {
+    local dir=$1
+
+    run_mon $dir a || return 1
+    run_mgr $dir x || return 1
+    run_osd $dir 0 || return 1
+    run_osd $dir 1 || return 1
+
+    ceph osd crush weight-set create-compat || return 1
+    ceph osd crush weight-set reweight-compat osd.0 2 || return 1
+    ceph osd crush weight-set reweight-compat osd.1 2 || return 1
+    ceph osd crush tree
+    ceph osd crush tree | grep HOST | grep '6.00000  4.00000' || return 1
+
+    # moving a bucket adjusts the weights
+    ceph osd crush add-bucket RACK rack root=default || return 1
+    ceph osd crush move HOST rack=RACK || return 1
+    ceph osd crush tree
+    ceph osd crush tree | grep HOST | grep '6.00000  4.00000' || return 1
+    ceph osd crush tree | grep RACK | grep '6.00000  4.00000' || return 1
+
+    # weight-set reweight adjusts containing buckets
+    ceph osd crush weight-set reweight-compat osd.0 1 || return 1
+    ceph osd crush tree
+    ceph osd crush tree | grep HOST | grep '6.00000  3.00000' || return 1
+    ceph osd crush tree | grep RACK | grep '6.00000  3.00000' || return 1
+
+    # moving a leaf resets its weight-set to the canonical weight...
+    ceph config set mon osd_crush_update_weight_set true || return 1
+    ceph osd crush add-bucket FOO host root=default || return 1
+    ceph osd crush move osd.0 host=FOO || return 1
+    ceph osd crush tree
+    ceph osd crush tree | grep osd.0 | grep '3.00000  3.00000' || return 1
+    ceph osd crush tree | grep HOST | grep '3.00000  2.00000' || return 1
+    ceph osd crush tree | grep RACK | grep '3.00000  2.00000' || return 1
+
+    # ...or to zero.
+    ceph config set mon osd_crush_update_weight_set false || return 1
+    ceph osd crush move osd.1 host=FOO || return 1
+    ceph osd crush tree
+    ceph osd crush tree | grep osd.0 | grep '3.00000  3.00000' || return 1
+    ceph osd crush tree | grep osd.1 | grep '3.00000        0' || return 1
+    ceph osd crush tree | grep FOO | grep '6.00000  3.00000' || return 1
+}
+
 main crush-choose-args "$@"
 
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