Rework replacement procedure again
Avoid calling other functions; replicate the actual process from Ceph docs (https://docs.ceph.com/en/pacific/rados/operations/add-or-rm-osds/) to ensure things work out well (e.g. preserving OSD IDs).
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parent
ed5bc9fb43
commit
dd0177ce10
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@ -27,6 +27,7 @@ from daemon_lib.ceph import format_bytes_fromhuman, get_list_osd
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from distutils.util import strtobool
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from re import search, match, sub
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from uuid import uuid4
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from json import loads as jloads
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@ -431,18 +432,7 @@ class CephOSDInstance(object):
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osd_vg = osd_details["vg_name"]
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osd_lv = osd_details["lv_name"]
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# 5b. Activate the OSD
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logger.out(f"Activating OSD {osd_id}", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph-volume lvm activate --bluestore {osd_id} {osd_fsid}"
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)
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if retcode:
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logger.out("Failed: ceph-volume lvm activate", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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# 5c. Add it to the crush map
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# 5b. Add it to the crush map
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logger.out(f"Adding OSD {osd_id} to CRUSH map", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph osd crush add osd.{osd_id} {weight} root=default host={node}"
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@ -453,6 +443,17 @@ class CephOSDInstance(object):
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logger.out(stderr, state="d")
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raise Exception
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# 5c. Activate the OSD
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logger.out(f"Activating OSD {osd_id}", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph-volume lvm activate --bluestore {osd_id} {osd_fsid}"
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)
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if retcode:
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logger.out("Failed: ceph-volume lvm activate", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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# 5d. Wait half a second for it to activate
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time.sleep(0.5)
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@ -563,59 +564,232 @@ class CephOSDInstance(object):
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if weight is None:
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weight = all_osds_on_block[0]["stats"]["weight"]
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# Determine how many split OSD(s) to recreate
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if len(all_osds_on_block) > 1 and all_osds_on_block[0]["is_split"]:
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split_count = len(all_osds_on_block)
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else:
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split_count = None
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# Take down the OSD(s), but keep it's CRUSH map details and IDs
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try:
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for osd in all_osds_on_block:
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osd_id = osd["id"]
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# Determine if an ext_db should be readded
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if ext_db_ratio is not None:
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osd_db_ratio = ext_db_ratio
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osd_db_size = None
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elif ext_db_size is not None:
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osd_db_ratio = None
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osd_db_size = ext_db_size
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elif all_osds_on_block[0]["db_device"]:
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_, osd_db_size_bytes, _ = common.run_os_command(
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f"blockdev --getsize64 {all_osds_on_block[0]['db_device']}"
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)
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osd_db_ratio = None
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osd_db_size = f"{osd_db_size_bytes}"
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if not osd_db_size:
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logger.out(
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f"Could not get size of device {all_osds_on_block[0]['db_device']}; skipping external database creation",
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state="w",
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# 1. Set the OSD down and out so it will flush
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logger.out(f"Setting down OSD {osd_id}", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph osd down {osd_id}"
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)
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osd_db_size = None
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else:
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osd_db_ratio = None
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osd_db_size = None
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if retcode:
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logger.out("Failed: ceph osd down", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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# Remove each OSD on the block device
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for osd in all_osds_on_block:
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result = CephOSDInstance.remove_osd(
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zkhandler,
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logger,
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node,
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osd["id"],
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force_flag=True,
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skip_zap_flag=skip_zap,
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logger.out(f"Setting out OSD {osd_id}", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph osd out {osd_id}"
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)
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if retcode:
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logger.out("Failed: ceph osd out", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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# 2. Wait for the OSD to be safe to remove (but don't wait for rebalancing to complete)
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logger.out(f"Waiting for OSD {osd_id} to be safe to remove", state="i")
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while True:
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retcode, stdout, stderr = common.run_os_command(
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f"ceph osd safe-to-destroy osd.{osd_id}"
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)
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if int(retcode) in [0, 11]:
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break
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else:
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time.sleep(1)
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# 3. Stop the OSD process and wait for it to be terminated
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logger.out(f"Stopping OSD {osd_id}", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"systemctl stop ceph-osd@{osd_id}"
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)
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if retcode:
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logger.out("Failed: systemctl stop", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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time.sleep(5)
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# 4. Destroy the OSD
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logger.out(f"Destroying OSD {osd_id}", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph osd destroy {osd_id} --yes-i-really-mean-it"
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)
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if retcode:
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logger.out("Failed: ceph osd destroy", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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if not skip_zap:
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# 5. Zap the old disk
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retcode, stdout, stderr = common.run_os_command(
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f"ceph-volume lvm zap --destroy {real_old_device}"
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)
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if retcode:
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logger.out("Failed: ceph-volume lvm zap", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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# 6. Prepare the volume group on the new device
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logger.out(f"Preparing LVM volume group on disk {new_device}", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph-volume lvm zap --destroy {new_device}"
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)
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if retcode:
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logger.out("Failed: ceph-volume lvm zap", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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retcode, stdout, stderr = common.run_os_command(f"pvcreate {new_device}")
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if retcode:
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logger.out("Failed: pvcreate", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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vg_uuid = str(uuid4())
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retcode, stdout, stderr = common.run_os_command(
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f"vgcreate ceph-{vg_uuid} {new_device}"
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)
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if retcode:
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logger.out("Failed: vgcreate", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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# Determine how many OSDs we want on the new device
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osds_count = len(all_osds_on_block)
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# Determine the size of the new device
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_, new_device_size_bytes, _ = common.run_os_command(
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f"blockdev --getsize64 {new_device}"
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)
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# Create [a] new OSD[s], on the new block device
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result = CephOSDInstance.add_osd(
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zkhandler,
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logger,
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node,
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new_device,
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weight,
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ext_db_ratio=osd_db_ratio,
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ext_db_size=osd_db_size,
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split_count=split_count,
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)
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# Calculate the size of each OSD (in MB) based on the default 4M extent size
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new_osd_size_mb = (
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int(int(int(new_device_size_bytes) / osds_count) / 1024 / 1024 / 4) * 4
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)
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return result
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# Calculate the size, if applicable, of the OSD block if we were passed a ratio
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if ext_db_ratio is not None:
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osd_new_db_size_mb = int(
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int(int(new_osd_size_mb * ext_db_ratio) / 4) * 4
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)
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elif ext_db_size is not None:
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osd_new_db_size_mb = int(
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int(int(format_bytes_fromhuman(ext_db_size)) / 1024 / 1024 / 4) * 4
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)
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else:
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_, new_device_size_bytes, _ = common.run_os_command(
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f"blockdev --getsize64 {all_osds_on_block[0]['db_device']}"
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)
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osd_new_db_size_mb = int(
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int(int(new_device_size_bytes) / 1024 / 1024 / 4) * 4
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)
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for osd in all_osds_on_block:
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osd_id = osd["id"]
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osd_fsid = osd["stats"]["uuid"]
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logger.out(
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f"Preparing LVM logical volume on disk {new_device} for OSD {osd_id}",
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state="i",
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)
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retcode, stdout, stderr = common.run_os_command(
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f"lvcreate -L {new_osd_size_mb}M -n osd-block-{osd_fsid} ceph-{vg_uuid}"
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)
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if retcode:
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logger.out("Failed: lvcreate", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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logger.out(f"Preparing OSD {osd_id} on disk {new_device}", state="i")
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retcode, stdout, stderr = common.run_os_comand(
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f"ceph-volume lvm prepare --bluestore --osd-id {osd_id} --osd-fsid {osd_fsid} --data /dev/ceph-{vg_uuid}/osd-block-{osd_fsid}"
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)
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if retcode:
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logger.out("Failed: ceph-volume lvm prepare", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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for osd in all_osds_on_block:
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osd_id = osd["id"]
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osd_fsid = osd["stats"]["uuid"]
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if osd["db_device"]:
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db_device = f"osd-db/osd-{osd_id}"
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logger.out(
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f"Destroying old Bluestore DB volume for OSD {osd_id}",
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state="i",
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)
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retcode, stdout, stderr = common.run_os_command(
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f"lvremove {db_device}"
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)
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logger.out(
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f"Creating new Bluestore DB volume for OSD {osd_id}", state="i"
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)
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retcode, stdout, stderr = common.run_os_command(
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f"lvcreate -L {osd_new_db_size_mb}M -n osd-{osd_id} osd-db"
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)
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if retcode:
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logger.out("Failed: lvcreate", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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logger.out(
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f"Attaching old Bluestore DB volume to OSD {osd_id}", state="i"
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)
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retcode, stdout, stderr = common.run_os_command(
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f"ceph-volume lvm new-db --osd-id {osd_id} --osd-fsid {osd_fsid} --target {db_device}"
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)
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if retcode:
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logger.out("Failed: ceph-volume lvm new-db", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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logger.out(f"Adding OSD {osd_id} to CRUSH map", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph osd crush add osd.{osd_id} {weight} root=default host={node}"
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)
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if retcode:
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logger.out("Failed: ceph osd crush add", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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logger.out(f"Activating OSD {osd_id}", state="i")
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retcode, stdout, stderr = common.run_os_command(
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f"ceph-volume lvm activate --bluestore {osd_id} {osd_fsid}"
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)
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if retcode:
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logger.out("Failed: ceph-volume lvm activate", state="e")
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logger.out(stdout, state="d")
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logger.out(stderr, state="d")
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raise Exception
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# Log it
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logger.out(
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f"Successfully replaced OSDs {','.join([o['id'] for o in all_osds_on_block])} on new disk {new_device}",
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state="o",
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)
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return True
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except Exception as e:
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# Log it
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logger.out(
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f"Failed to replace OSD(s) on new disk {new_device}: {e}", state="e"
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)
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return False
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@staticmethod
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def refresh_osd(zkhandler, logger, node, osd_id, device, ext_db_flag):
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