On Thu, Apr 27, 2023 at 11:36 AM Tarrago, Eli (RIS-BCT)
<Eli.Tarrago@xxxxxxxxxxxxxxxxxx> wrote:
>
> After working on this issue for a bit.
> The active plan is to fail over master, to the “west” dc. Perform a realm pull from the west so that it forces the failover to occur. Then have the “east” DC, then pull the realm data back. Hopefully will get both sides back in sync..
>
> My concern with this approach is both sides are “active”, meaning the client has been writing data to both endpoints. Will this cause an issue where “west” will have data that the metadata does not have record of, and then delete the data?
no object data would be deleted as a result of metadata failover issues, no
>
> Thanks
>
> From: Tarrago, Eli (RIS-BCT) <Eli.Tarrago@xxxxxxxxxxxxxxxxxx>
> Date: Thursday, April 20, 2023 at 3:13 PM
> To: Ceph Users <ceph-users@xxxxxxx>
> Subject: Radosgw multisite replication issues
> Good Afternoon,
>
> I am experiencing an issue where east-1 is no longer able to replicate from west-1, however, after a realm pull, west-1 is now able to replicate from east-1.
>
> In other words:
> West <- Can Replicate <- East
> West -> Cannot Replicate -> East
>
> After confirming the access and secret keys are identical on both sides, I restarted all radosgw services.
>
> Here is the current status of the cluster below.
>
> Thank you for your help,
>
> Eli Tarrago
>
>
> root@east01:~# radosgw-admin zone get
> {
> "id": "ddd66ab8-0417-46ee-a53b-043352a63f93",
> "name": "rgw-east",
> "domain_root": "rgw-east.rgw.meta:root",
> "control_pool": "rgw-east.rgw.control",
> "gc_pool": "rgw-east.rgw.log:gc",
> "lc_pool": "rgw-east.rgw.log:lc",
> "log_pool": "rgw-east.rgw.log",
> "intent_log_pool": "rgw-east.rgw.log:intent",
> "usage_log_pool": "rgw-east.rgw.log:usage",
> "roles_pool": "rgw-east.rgw.meta:roles",
> "reshard_pool": "rgw-east.rgw.log:reshard",
> "user_keys_pool": "rgw-east.rgw.meta:users.keys",
> "user_email_pool": "rgw-east.rgw.meta:users.email",
> "user_swift_pool": "rgw-east.rgw.meta:users.swift",
> "user_uid_pool": "rgw-east.rgw.meta:users.uid",
> "otp_pool": "rgw-east.rgw.otp",
> "system_key": {
> "access_key": "PxxxxxxxxxxxxxxxxW",
> "secret_key": "Hxxxxxxxxxxxxxxxx6"
> },
> "placement_pools": [
> {
> "key": "default-placement",
> "val": {
> "index_pool": "rgw-east.rgw.buckets.index",
> "storage_classes": {
> "STANDARD": {
> "data_pool": "rgw-east.rgw.buckets.data"
> }
> },
> "data_extra_pool": "rgw-east.rgw.buckets.non-ec",
> "index_type": 0
> }
> }
> ],
> "realm_id": "98e0e391-16fb-48da-80a5-08437fd81789",
> "notif_pool": "rgw-east.rgw.log:notif"
> }
>
> root@west01:~# radosgw-admin zone get
> {
> "id": "b2a4a31c-1505-4fdc-b2e0-ea07d9463da1",
> "name": "rgw-west",
> "domain_root": "rgw-west.rgw.meta:root",
> "control_pool": "rgw-west.rgw.control",
> "gc_pool": "rgw-west.rgw.log:gc",
> "lc_pool": "rgw-west.rgw.log:lc",
> "log_pool": "rgw-west.rgw.log",
> "intent_log_pool": "rgw-west.rgw.log:intent",
> "usage_log_pool": "rgw-west.rgw.log:usage",
> "roles_pool": "rgw-west.rgw.meta:roles",
> "reshard_pool": "rgw-west.rgw.log:reshard",
> "user_keys_pool": "rgw-west.rgw.meta:users.keys",
> "user_email_pool": "rgw-west.rgw.meta:users.email",
> "user_swift_pool": "rgw-west.rgw.meta:users.swift",
> "user_uid_pool": "rgw-west.rgw.meta:users.uid",
> "otp_pool": "rgw-west.rgw.otp",
> "system_key": {
> "access_key": "PxxxxxxxxxxxxxxW",
> "secret_key": "Hxxxxxxxxxxxxxx6"
> },
> "placement_pools": [
> {
> "key": "default-placement",
> "val": {
> "index_pool": "rgw-west.rgw.buckets.index",
> "storage_classes": {
> "STANDARD": {
> "data_pool": "rgw-west.rgw.buckets.data"
> }
> },
> "data_extra_pool": "rgw-west.rgw.buckets.non-ec",
> "index_type": 0
> }
> }
> ],
> "realm_id": "98e0e391-16fb-48da-80a5-08437fd81789",
> "notif_pool": "rgw-west.rgw.log:notif"
> east01:~# radosgw-admin metadata sync status
> {
> "sync_status": {
> "info": {
> "status": "init",
> "num_shards": 0,
> "period": "",
> "realm_epoch": 0
> },
> "markers": []
> },
> "full_sync": {
> "total": 0,
> "complete": 0
> }
> }
>
> west01:~# radosgw-admin metadata sync status
> {
> "sync_status": {
> "info": {
> "status": "sync",
> "num_shards": 64,
> "period": "44b6b308-e2d8-4835-8518-c90447e7b55c",
> "realm_epoch": 3
> },
> "markers": [
> {
> "key": 0,
> "val": {
> "state": 1,
> "marker": "",
> "next_step_marker": "",
> "total_entries": 46,
> "pos": 0,
> "timestamp": "0.000000",
> "realm_epoch": 3
> }
> },
> #### goes on for a long time…
> {
> "key": 63,
> "val": {
> "state": 1,
> "marker": "",
> "next_step_marker": "",
> "total_entries": 0,
> "pos": 0,
> "timestamp": "0.000000",
> "realm_epoch": 3
> }
> }
> ]
> },
> "full_sync": {
> "total": 46,
> "complete": 46
> }
> }
>
> east01:~# radosgw-admin sync status
> realm 98e0e391-16fb-48da-80a5-08437fd81789 (rgw-blobs)
> zonegroup 0e0faf4e-39f5-402e-9dbb-4a1cdc249ddd (EastWestceph)
> zone ddd66ab8-0417-46ee-a53b-043352a63f93 (rgw-east)
> metadata sync no sync (zone is master)
> 2023-04-20T19:03:13.388+0000 7f25fa036c80 0 ERROR: failed to fetch datalog info
> data sync source: b2a4a31c-1505-4fdc-b2e0-ea07d9463da1 (rgw-west)
> failed to retrieve sync info: (13) Permission denied
does the multisite system user exist on the rgw-west zone? you can
check there with `radosgw-admin user info --access-key
PxxxxxxxxxxxxxxW`
the sync status on rgw-west shows that metadata sync is caught up so i
would expect it to have that user metadata, but maybe not?
>
> west01:~# radosgw-admin sync status
> realm 98e0e391-16fb-48da-80a5-08437fd81789 (rgw-blobs)
> zonegroup 0e0faf4e-39f5-402e-9dbb-4a1cdc249ddd (EastWestceph)
> zone b2a4a31c-1505-4fdc-b2e0-ea07d9463da1 (rgw-west)
> metadata sync syncing
> full sync: 0/64 shards
> incremental sync: 64/64 shards
> metadata is caught up with master
> data sync source: ddd66ab8-0417-46ee-a53b-043352a63f93 (rgw-east)
> syncing
> full sync: 0/128 shards
> incremental sync: 128/128 shards
> data is behind on 16 shards
> behind shards: [5,56,62,65,66,70,76,86,87,94,104,107,111,113,120,126]
> oldest incremental change not applied: 2023-04-20T19:02:48.783283+0000 [5]
>
> east01:~# radosgw-admin zonegroup get
> {
> "id": "0e0faf4e-39f5-402e-9dbb-4a1cdc249ddd",
> "name": "EastWestceph",
> "api_name": "EastWestceph",
> "is_master": "true",
> "endpoints": [
> http://east01.example.net:8080,
> http://east02.example.net:8080,
> http://east03.example.net:8080,
> http://west01.example.net:8080,
> http://west02.example.net:8080,
> http://west03.example.net:8080
> ],
> "hostnames": [
> "eastvip.example.net",
> "westvip.example.net"
> ],
> "hostnames_s3website": [],
> "master_zone": "ddd66ab8-0417-46ee-a53b-043352a63f93",
> "zones": [
> {
> "id": "b2a4a31c-1505-4fdc-b2e0-ea07d9463da1",
> "name": "rgw-west",
> "endpoints": [
> http://west01.example.net:8080,
> http://west02.example.net:8080,
> http://west03.example.net:8080
> ],
> "log_meta": "false",
> "log_data": "true",
> "bucket_index_max_shards": 0,
> "read_only": "false",
> "tier_type": "",
> "sync_from_all": "true",
> "sync_from": [],
> "redirect_zone": ""
> },
> {
> "id": "ddd66ab8-0417-46ee-a53b-043352a63f93",
> "name": "rgw-east",
> "endpoints": [
> http://east01.example.net:8080,
> http://east02.example.net:8080,
> http://east03.example.net:8080
> ],
> "log_meta": "false",
> "log_data": "true",
> "bucket_index_max_shards": 0,
> "read_only": "false",
> "tier_type": "",
> "sync_from_all": "true",
> "sync_from": [],
> "redirect_zone": ""
> }
> ],
> "placement_targets": [
> {
> "name": "default-placement",
> "tags": [],
> "storage_classes": [
> "STANDARD"
> ]
> }
> ],
> "default_placement": "default-placement",
> "realm_id": "98e0e391-16fb-48da-80a5-08437fd81789",
> "sync_policy": {
> "groups": []
> }
> }
>
>
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