Use the disk size as the osd weight when osd_initial_weight is auto

In most of case, the disks used by ceph have different size. Use the
default value 1 may block the ceph when one disk is full. Use the disk
size as osd weight will more reasonally.

TrivialFix

Change-Id: Ib875c7289188cbb9380355baf0c8048f1eb09332

docker/base/Dockerfile.j2

@@ -200,6 +200,7 @@ COPY apt_preferences.{{ base_distro }} /etc/apt/preferences
 {% set base_apt_packages = [
    'ca-certificates',
    'curl',
+   'gawk',
    'lvm2',
    'open-iscsi',
    'python',

docker/ceph/ceph-osd/extend_start.sh

@@ -50,6 +50,10 @@ if [[ "${!KOLLA_BOOTSTRAP[@]}" ]]; then
         CEPH_ROOT_NAME=cache
     fi
 
+    if [[ "${OSD_INITIAL_WEIGHT}" == "auto" ]]; then
+        OSD_INITIAL_WEIGHT=$(parted --script ${OSD_PARTITION} unit TB print | awk 'match($0, /^Disk.* (.*)TB/, a){printf("%.2f", a[1])}')
+    fi
+
     # These commands only need to be run once per host but are safe to run
     # repeatedly. This can be improved later or if any problems arise.
     ceph osd crush add-bucket "${HOSTNAME}${CEPH_ROOT_NAME:+-${CEPH_ROOT_NAME}}" host

releasenotes/notes/support-disk-size-as-weight-in-ceph-9d6353f1d3f03199.yaml

@@ -0,0 +1,11 @@
+---
+prelude: >
+  In most of case, the disks used by ceph have different size. Use the default
+  value 1 may block the ceph when one disk is full. Use the disk size as osd
+  weight will more reasonally.
+features:
+  - support using the disk size as the osd weight when osd_initial_weight is
+    auto
+upgrade:
+  - the os_initial_weight still has the default value 1, it will not break
+    cluster when upgrading.