If you set up slurm elastic cloud in EC2 without LDAP, what is the recommended method for sync of the passwd/group files? Is this necessary to get openmpi jobs to run. I would swear I had this working last week without synced passwd on two nodes. But thinking about it now I'm not sure how this could have worked. My home directories are in an NFS mount, but the user accounts don't exist on the node AMI. I'm using ansible/packer to manage the AMI's. When I ran OpenHPC / Slurm on bare metal there was a sync process. This is my first AWS Slurm cluster rodeo. I can't use the Amazon Parallel Computing tools because we are forced to be in GovCloud. I started with "ClusterInTheCloud", but it's all 4 years old, and semi-broken out of the box. My manager had me ditch a lot of it (including LDAP). So I'm building out a fork that is getting heavily modded for our situation. An ORTE daemon has unexpectedly failed after launch and before communicating back to mpirun. This could be caused by a number of factors, including an inability to create a connection back to mpirun due to a lack of common network interfaces and/or no route found between them. Please check network connectivity
Have you try this? https://slurm.schedmd.com/nss_slurm.html. it is providing the user/group/id. I tried in test/dev environment, but not in large production environment, but should be a handy feature to start with.
Keep the /etc/password, group synced to all the nodes should work. And it will need to set up an SSH key for MPI. Best, Feng On Mon, Feb 10, 2025 at 10:29 PM mark.w.moorcroft--- via slurm-users < slurm-users@lists.schedmd.com> wrote:
If you set up slurm elastic cloud in EC2 without LDAP, what is the recommended method for sync of the passwd/group files? Is this necessary to get openmpi jobs to run. I would swear I had this working last week without synced passwd on two nodes. But thinking about it now I'm not sure how this could have worked. My home directories are in an NFS mount, but the user accounts don't exist on the node AMI. I'm using ansible/packer to manage the AMI's. When I ran OpenHPC / Slurm on bare metal there was a sync process. This is my first AWS Slurm cluster rodeo. I can't use the Amazon Parallel Computing tools because we are forced to be in GovCloud. I started with "ClusterInTheCloud", but it's all 4 years old, and semi-broken out of the box. My manager had me ditch a lot of it (including LDAP). So I'm building out a fork that is getting heavily modded for our situation.
An ORTE daemon has unexpectedly failed after launch and before communicating back to mpirun. This could be caused by a number of factors, including an inability to create a connection back to mpirun due to a lack of common network interfaces and/or no route found between them. Please check network connectivity
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I’d put something in cloud-init or the EC2 user data script to synchronise them as the instance comes up, whatever your preference is for doing that sort of thing; ansible, or just simply copying the file (if you’re certain they should be identical on every node, and I’d hope they are!) Tim -- Tim Cutts Senior Director, R&D IT - Data, Analytics & AI, Scientific Computing Platform AstraZeneca Find out more about R&D IT Data, Analytics & AI and how we can support you by visiting our Service Catalogue<https://azcollaboration.sharepoint.com/sites/CMU993> | From: Feng Zhang via slurm-users <slurm-users@lists.schedmd.com> Date: Tuesday, 11 February 2025 at 10:10 pm To: mark.w.moorcroft@ama-inc.com <mark.w.moorcroft@ama-inc.com> Cc: slurm-users@lists.schedmd.com <slurm-users@lists.schedmd.com> Subject: [slurm-users] Re: /etc/passwd sync? Keep the /etc/password, group synced to all the nodes should work. And it will need to set up an SSH key for MPI. Best, Feng On Mon, Feb 10, 2025 at 10:29 PM mark.w.moorcroft--- via slurm-users <slurm-users@lists.schedmd.com<mailto:slurm-users@lists.schedmd.com>> wrote: If you set up slurm elastic cloud in EC2 without LDAP, what is the recommended method for sync of the passwd/group files? Is this necessary to get openmpi jobs to run. I would swear I had this working last week without synced passwd on two nodes. But thinking about it now I'm not sure how this could have worked. My home directories are in an NFS mount, but the user accounts don't exist on the node AMI. I'm using ansible/packer to manage the AMI's. When I ran OpenHPC / Slurm on bare metal there was a sync process. This is my first AWS Slurm cluster rodeo. I can't use the Amazon Parallel Computing tools because we are forced to be in GovCloud. I started with "ClusterInTheCloud", but it's all 4 years old, and semi-broken out of the box. My manager had me ditch a lot of it (including LDAP). So I'm building out a fork that is getting heavily modded for our situation. An ORTE daemon has unexpectedly failed after launch and before communicating back to mpirun. This could be caused by a number of factors, including an inability to create a connection back to mpirun due to a lack of common network interfaces and/or no route found between them. Please check network connectivity -- slurm-users mailing list -- slurm-users@lists.schedmd.com<mailto:slurm-users@lists.schedmd.com> To unsubscribe send an email to slurm-users-leave@lists.schedmd.com<mailto:slurm-users-leave@lists.schedmd.com> ________________________________ AstraZeneca UK Limited is a company incorporated in England and Wales with registered number:03674842 and its registered office at 1 Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge, CB2 0AA. This e-mail and its attachments are intended for the above named recipient only and may contain confidential and privileged information. If they have come to you in error, you must not copy or show them to anyone; instead, please reply to this e-mail, highlighting the error to the sender and then immediately delete the message. For information about how AstraZeneca UK Limited and its affiliates may process information, personal data and monitor communications, please see our privacy notice at www.astrazeneca.com<https://www.astrazeneca.com>
Can you not use Parallel Cluster, rather than the Parallel Computing Service? Parallel Cluster is just EC2 autoscaling and some shared storage through CloudFormation/CDK and a command line interface. I don’t think there are any secret special services? Tim -- Tim Cutts Senior Director, R&D IT - Data, Analytics & AI, Scientific Computing Platform AstraZeneca Find out more about R&D IT Data, Analytics & AI and how we can support you by visiting our Service Catalogue<https://azcollaboration.sharepoint.com/sites/CMU993> | From: mark.w.moorcroft--- via slurm-users <slurm-users@lists.schedmd.com> Date: Tuesday, 11 February 2025 at 3:29 am To: slurm-users@lists.schedmd.com <slurm-users@lists.schedmd.com> Subject: [slurm-users] /etc/passwd sync? If you set up slurm elastic cloud in EC2 without LDAP, what is the recommended method for sync of the passwd/group files? Is this necessary to get openmpi jobs to run. I would swear I had this working last week without synced passwd on two nodes. But thinking about it now I'm not sure how this could have worked. My home directories are in an NFS mount, but the user accounts don't exist on the node AMI. I'm using ansible/packer to manage the AMI's. When I ran OpenHPC / Slurm on bare metal there was a sync process. This is my first AWS Slurm cluster rodeo. I can't use the Amazon Parallel Computing tools because we are forced to be in GovCloud. I started with "ClusterInTheCloud", but it's all 4 years old, and semi-broken out of the box. My manager had me ditch a lot of it (including LDAP). So I'm building out a fork that is getting heavily modded for our situation. An ORTE daemon has unexpectedly failed after launch and before communicating back to mpirun. This could be caused by a number of factors, including an inability to create a connection back to mpirun due to a lack of common network interfaces and/or no route found between them. Please check network connectivity -- slurm-users mailing list -- slurm-users@lists.schedmd.com To unsubscribe send an email to slurm-users-leave@lists.schedmd.com ________________________________ AstraZeneca UK Limited is a company incorporated in England and Wales with registered number:03674842 and its registered office at 1 Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge, CB2 0AA. This e-mail and its attachments are intended for the above named recipient only and may contain confidential and privileged information. If they have come to you in error, you must not copy or show them to anyone; instead, please reply to this e-mail, highlighting the error to the sender and then immediately delete the message. For information about how AstraZeneca UK Limited and its affiliates may process information, personal data and monitor communications, please see our privacy notice at www.astrazeneca.com<https://www.astrazeneca.com>
participants (4)
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Cutts, Tim -
Feng Zhang -
mark.w.moorcroft＠ama-inc.com -
Patrick Pun