# Overriding auto-placement policy **URL:** \ **Category:** LINSTOR\ **Tags:** drbd\ **Created:** [August 6, 2025, 7:38am UTC](https://forums.linbit.com/t/overriding-auto-placement-policy/960 "2025-08-06T07:38:34Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![sviridoff](https://yyz1.discourse-cdn.com/flex003/user_avatar/forums.linbit.com/sviridoff/32/255_2.png) [@sviridoff](https://forums.linbit.com/u/sviridoff)\ **Post date:** [August 6, 2025, 7:38am UTC](https://forums.linbit.com/t/overriding-auto-placement-policy/960/1 "2025-08-06T07:38:34Z")
Hi everyone! Need some help! Could anyone advise me on how to fix auto-placement? I have a HA controller set up using DRBD reactor. Following the instructions, I set up the resource-definition and then created the resource using the command: ```auto linstor resource create linstor_db --auto-place 3 ``` I placed this resource on the storage pool ‘vmdata’. Later, I created a resource-group on the same storage pool using the command: `linstor rg create cloudstack --place-count 2 --storage-pool vmdata` Now it seems that linstor is applying the rule `--place-count 2` instead of 3 to this resource. I’ve tried running: `linstor resource-definition auto-place linstor_db --place-count 3` but this only helps temporarily. Linstor later removes the third replica again. Seems I’m doing something wrong. Could someone advise me on what I need to do to get linstor\_db to use the correct value of `--place-count 3` again? ---
**Author:** ![candlerb](https://avatars.discourse-cdn.com/v4/letter/c/c5a1d2/32.png) [@candlerb](https://forums.linbit.com/u/candlerb)\ **Post date:** [August 6, 2025, 1:33pm UTC](https://forums.linbit.com/t/overriding-auto-placement-policy/960/2 "2025-08-06T13:33:10Z")
What do `linstor rd list -r linstor_db`, `linstor rd lp linstor_db` and `linstor rg l` show? > [@sviridoff](#): > > `linstor resource create linstor_db --auto-place 3` You didn’t show your resource-group or resource-definition steps. It’s [recommended](https://linbit.com/drbd-user-guide/linstor-guide-1_0-en/#s-linstor_ha) that you give linstor its own resource group: ```auto linstor resource-group create \ --storage-pool my-thin-pool \ --place-count 3 \ --diskless-on-remaining true \ linstor-db-grp linstor resource-group drbd-options \ --auto-promote=no \ --quorum=majority \ --on-suspended-primary-outdated=force-secondary \ --on-no-quorum=io-error \ --on-no-data-accessible=io-error \ linstor-db-grp linstor volume-group create linstor-db-grp linstor resource-group spawn-resources linstor-db-grp linstor_db 200M ``` The “place-count” is therefore picked up from the linstor\_db resource group; this is the target number of replicas to maintain. Note that “spawn-resources” means you don’t need to do “linstor resource create” at all; if you choose not to do this, then you’ll need separately to create a resource-definition, a volume-definition, and then the resources. In your case, I can’t see what resource-group you used to create the `linstor_db` resource-definition. By specifying `--auto-place 3` at resource creation time you simply told it to create three new resources _at that instant in time_, but the target number of resources is still inherited from the resource group, and that’s what it will try to align with in the future. ---
**Author:** ![sviridoff](https://yyz1.discourse-cdn.com/flex003/user_avatar/forums.linbit.com/sviridoff/32/255_2.png) [@sviridoff](https://forums.linbit.com/u/sviridoff)\ **Post date:** [August 6, 2025, 1:57pm UTC](https://forums.linbit.com/t/overriding-auto-placement-policy/960/3 "2025-08-06T13:57:52Z")
Hi @candlerb ! Thanks for your reply. When I create linstor\_ db, I didn’t create any rg. I done it? like this: linstor resource-definition create linstor\_db linstor rd drbd-options --auto-promote=no linstor\_db linstor rd drbd-options --quorum=majority linstor\_db linstor rd drbd-options --on-suspended-primary-outdated=force-secondary linstor\_db linstor rd drbd-options --on-no-quorum=io-error linstor\_db linstor rd drbd-options --on-no-data-accessible=io-error linstor\_db linstor rd drbd-options --rr-conflict=retry-connect linstor\_db linstor volume-definition create linstor\_db 200M linstor resource create linstor\_db --auto-place 3 And after I setting up drbd reactor? i have created rg for vm’s linstor rg create cloudstack --place-count 2 --storage-pool vmdata Sо, now I have: ![image](https://canada1.discourse-cdn.com/flex003/uploads/linbit/original/1X/a0d23801baa8af63f7d0d8cd168f18bd49f8cf7d.png) So looks like linstor\_bd in cloudstack rg now. Can you tell me? whats the best way to solve this now? ---
**Author:** ![candlerb](https://avatars.discourse-cdn.com/v4/letter/c/c5a1d2/32.png) [@candlerb](https://forums.linbit.com/u/candlerb)\ **Post date:** [August 6, 2025, 2:03pm UTC](https://forums.linbit.com/t/overriding-auto-placement-policy/960/4 "2025-08-06T14:03:25Z")
> [@sviridoff](#): > > linstor resource-definition create linstor\_db Then I believe this resource definition will be linked to DfltRscGrp, which has a PlaceCount of 2. > So looks like linstor\_bd in cloudstack rg now No. As I asked before, please show `linstor rd list -r linstor_db` - this will show you what resource-group this resource-definition belongs to. My guess is it’s using DfltRscGrp. > whats the best way to solve this now? Easy: 1. Create a new linstor-db-grp resource group as shown above (but with the right storage pool) 2. Modify the resource-group on the linstor\_db resource definition to point to this new resource group, using `linstor resource-definition modify` I wrote a blog post about this years ago, but it’s still relevant: [Linstor: concepts and configuration | by Brian Candler | Medium](https://brian-candler.medium.com/linstor-concepts-and-configuration-e5b0c8e10d27) (See under heading “ **Moving a resource-definition to a new resource-group** “) ---
**Author:** ![sviridoff](https://yyz1.discourse-cdn.com/flex003/user_avatar/forums.linbit.com/sviridoff/32/255_2.png) [@sviridoff](https://forums.linbit.com/u/sviridoff)\ **Post date:** [August 6, 2025, 2:32pm UTC](https://forums.linbit.com/t/overriding-auto-placement-policy/960/5 "2025-08-06T14:32:10Z")
> [@candlerb](#): > > As I asked before, please show `linstor rd list -r linstor_db` - this will show you what resource-group this resource-definition belongs to. My guess is it’s using DfltRscGrp. Sorry, missed this… And you right it’s using DfltRscGrp. ![image](https://canada1.discourse-cdn.com/flex003/uploads/linbit/original/1X/f8193ea494337e7644f075d5a2088455629bcbc1.png) I saw output of this command so many times, but not noticed this.(( > [@candlerb](#): > > Easy: > > 1. Create a new linstor-db-grp resource group as shown above (but with the right storage pool) > 2. Modify the resource-group on the linstor\_db resource definition to point to this new resource group, using `linstor resource-definition modify` One more question). Can be new rg on the same storage pool - vmdata with cloudstack rg or its not possible? ---
**Author:** ![candlerb](https://avatars.discourse-cdn.com/v4/letter/c/c5a1d2/32.png) [@candlerb](https://forums.linbit.com/u/candlerb)\ **Post date:** [August 6, 2025, 2:45pm UTC](https://forums.linbit.com/t/overriding-auto-placement-policy/960/6 "2025-08-06T14:45:21Z")
> [@sviridoff](#): > > Can be new rg on the same storage pool Yes: each resource group can list one or more storage pools to allocate from, and there is no requirement for a storage pool to be used by only one resource group. I think of a resource group as a “class of service” for resource definitions (which type of storage to use, and how many replicas) ---
**Author:** ![sviridoff](https://yyz1.discourse-cdn.com/flex003/user_avatar/forums.linbit.com/sviridoff/32/255_2.png) [@sviridoff](https://forums.linbit.com/u/sviridoff)\ **Post date:** [August 6, 2025, 4:22pm UTC](https://forums.linbit.com/t/overriding-auto-placement-policy/960/7 "2025-08-06T16:22:16Z")
@candlerb Thanks for you help!!! problem resolved.