root@ceph-01:~# diff -u original.txt adjusted.txt
--- original.txt        2020-06-25 18:35:12.618730103 +0000
+++ adjusted.txt        2020-06-25 18:32:59.136606925 +0000
@@ -32,15 +32,15 @@
 
 # buckets
 host ubuntu-s-2vcpu-4gb-fra1-ceph-01 {
-       id -3           # do not change unnecessarily
-       id -4 class hdd         # do not change unnecessarily
+       id -15          # do not change unnecessarily
+       id -3 class hdd         # do not change unnecessarily
        # weight 0.000
        alg straw2
        hash 0  # rjenkins1
 }
 host ubuntu-s-2vcpu-4gb-fra1-ceph-02 {
-       id -5           # do not change unnecessarily
-       id -6 class hdd         # do not change unnecessarily
+       id -14          # do not change unnecessarily
+       id -5 class hdd         # do not change unnecessarily
        # weight 0.080
        alg straw2
        hash 0  # rjenkins1
@@ -48,8 +48,8 @@
        item osd.3 weight 0.040
 }
 host ubuntu-s-2vcpu-4gb-fra1-ceph-03 {
-       id -7           # do not change unnecessarily
-       id -8 class hdd         # do not change unnecessarily
+       id -13          # do not change unnecessarily
+       id -7 class hdd         # do not change unnecessarily
        # weight 0.080
        alg straw2
        hash 0  # rjenkins1
@@ -57,8 +57,8 @@
        item osd.5 weight 0.040
 }
 host ceph-01 {
-       id -9           # do not change unnecessarily
-       id -10 class hdd                # do not change unnecessarily
+       id -12          # do not change unnecessarily
+       id -9 class hdd         # do not change unnecessarily
        # weight 0.080
        alg straw2
        hash 0  # rjenkins1
@@ -66,8 +66,8 @@
        item osd.0 weight 0.040
 }
 root default {
-       id -1           # do not change unnecessarily
-       id -2 class hdd         # do not change unnecessarily
+       id -11          # do not change unnecessarily
+       id -1 class hdd         # do not change unnecessarily
        # weight 0.240
        alg straw2
        hash 0  # rjenkins1
@@ -83,7 +83,7 @@
        type replicated
        min_size 1
        max_size 10
-       step take default
+       step take default class hdd
        step chooseleaf firstn 0 type host
        step emit
 }