Hi Benson, I am not able to do passwordless ssh between master and compute nodes using Munge service. when i am running below command , here it is asking for a password for the compute node.
*Am I configuring properly or not, so I need clarity on this?* [root@smaster ~]# munge -n | ssh snode unmunge root@snode's password: STATUS: Success (0) ENCODE_HOST: smaster.calligotech.com (192.168.1.195) ENCODE_TIME: 2021-02-01 13:58:16 +0530 (1612168096) DECODE_TIME: 2021-02-01 13:58:21 +0530 (1612168101) TTL: 300 CIPHER: aes128 (4) MAC: sha1 (3) ZIP: none (0) UID: root (0) GID: root (0) LENGTH: 0 [root@smaster ~]# Regards, Zain On Tue, Feb 2, 2021 at 6:05 PM Zainul Abiddin <zainul1...@gmail.com> wrote: > Hi, > [root@smaster ~]# munge -n | unmunge > STATUS: Success (0) > ENCODE_HOST: smaster.calligotech.com (192.168.1.195) > ENCODE_TIME: 2021-02-01 13:58:04 +0530 (1612168084) > DECODE_TIME: 2021-02-01 13:58:04 +0530 (1612168084) > TTL: 300 > CIPHER: aes128 (4) > MAC: sha1 (3) > ZIP: none (0) > UID: root (0) > GID: root (0) > LENGTH: 0 > > [root@smaster ~]# munge -n | ssh snode unmunge > root@snode's password: > STATUS: Success (0) > ENCODE_HOST: smaster.calligotech.com (192.168.1.195) > ENCODE_TIME: 2021-02-01 13:58:16 +0530 (1612168096) > DECODE_TIME: 2021-02-01 13:58:21 +0530 (1612168101) > TTL: 300 > CIPHER: aes128 (4) > MAC: sha1 (3) > ZIP: none (0) > UID: root (0) > GID: root (0) > LENGTH: 0 > > [root@smaster ~]# > > On Tue, Feb 2, 2021 at 6:00 PM Zainul Abiddin <zainul1...@gmail.com> > wrote: > >> Hi All, >> I am new to Slurm and trying to setup Slurm20.11.2 on Centos 7 >> My environment is Master node (smaster) + compute Node (snode) >> and i am using >> https://www.slothparadise.com/how-to-install-slurm-on-centos-7-cluster/ >> link to setup Slurm on Master and compute nodes. >> >> I have tried installing Munge on both the nodes and it's running fine. >> However when i try to run the Munge command from Master to Node its asking >> password. >> >> export MUNGEUSER=1001 >> groupadd -g $MUNGEUSER munge >> useradd -m -c "MUNGE Uid 'N' Gid Emporium" -d /var/lib/munge -u >> $MUNGEUSER -g munge -s /sbin/nologin munge >> export SlurmUSER=1002 >> groupadd -g $SlurmUSER slurm >> useradd -m -c "Slurm workload manager" -d /var/lib/slurm -u $SlurmUSER >> -g slurm -s /bin/bash slurm >> >> yum install -y epel-release >> yum install munge munge-libs munge-devel -y >> >> yum install rng-tools -y >> rngd -r /dev/urandom >> /usr/sbin/create-munge-key -r >> dd if=/dev/urandom bs=1 count=1024 > /etc/munge/munge.key >> chown munge: /etc/munge/munge.key >> chmod 400 /etc/munge/munge.key >> >> scp /etc/munge/munge.key root@snode:/etc/munge >> >> chown munge: /etc/munge/munge.key >> chmod 400 /etc/munge/munge.key >> chown -R munge: /etc/munge/ /var/log/munge/ >> chmod 0700 /etc/munge/ /var/log/munge/ >> >> systemctl enable munge >> systemctl start munge >> systemctl status munge >> >> [root@smaster ~]# systemctl status munge >> ? munge.service - MUNGE authentication service >> Loaded: loaded (/usr/lib/systemd/system/munge.service; enabled; vendor >> preset: disabled) >> Active: active (running) since Mon 2021-02-01 12:52:54 IST; 1h 4min ago >> Docs: man:munged(8) >> Process: 2547 ExecStart=/usr/sbin/munged (code=exited, status=0/SUCCESS) >> Main PID: 2550 (munged) >> Tasks: 4 >> CGroup: /system.slice/munge.service >> +-2550 /usr/sbin/munged >> >> Feb 01 12:52:54 smaster.calligotech.com systemd[1]: Starting MUNGE >> authentication service... >> Feb 01 12:52:54 smaster.calligotech.com systemd[1]: Started MUNGE >> authentication service. >> [root@smaster ~]# munge -n >> >> MUNGE:AwQDAAAg5PQzQhz/D4h7OGUU4Cx4QAgZ4z/0MMt0SP+uhuP927Xcl2t8EC4izsUj6xpMRslnIb2g4RCz2vayu0wW1o8mNNuy7cVv/PmsuO9XsAJ7aLl1n/M=: >> [root@smaster ~]# >> >> Below is the screenshot for reference. >> Smaster: >> [image: image.png] >> >> Snode: >> [image: image.png] >> >> Am I configuring properly or Do I need to set up passwordless >> authentication on Master to Node and vice-versa? >> >> Please clarify to me, whether Mugne will do passwordless login else >> do we need to setup passwordless. >> >> Please guide me with a proper setup link/Doc which includes Munge >> Configuration, Slurm account database Daemon configuration and Slurm >> installation and configuration with testing simple jobs on Master and >> Compute Nodes. >> >> -- >> *Regards* >> *Zain* >> >> > > >
