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ClusterShell

Install ClusterShell​

# Ubuntu
apt install clustershell

# Rocky
dnf install clustershell

# macOS
pip3 install ClusterShell

Example of configuration files​

Although you can use clush by default, but here's the list configuration files you should know. Especially, the /etc/clustershell/groups.d/local.cfg where you can add groups of nodes as you need.

  • /etc/clustershell/clush.conf
  • /etc/clustershell/groups.conf
  • /etc/clustershell/groups.d/local.cfg

clush.conf​

[Main]
fanout: 64
connect_timeout: 15
command_timeout: 0
color: auto
fd_max: 8192
history_size: 100
maxrc: no
node_count: yes
verbosity: 1
confdir: /etc/clustershell/clush.conf.d $CFGDIR/clush.conf.d

# Add always all remote hosts to known_hosts without confirmation
#ssh_user: root
#ssh_path: /usr/bin/ssh
#ssh_options: -oStrictHostKeyChecking=no

groups.conf​

default: local
confdir: /etc/clustershell/groups.conf.d $CFGDIR/groups.conf.d
autodir: /etc/clustershell/groups.d $CFGDIR/groups.d

[local]
map: [ -f $CFGDIR/groups ] && f=$CFGDIR/groups || f=$CFGDIR/groups.d/local.cfg; sed -n 's/^$GROUP:\(.*\)/\1/p' $f
all: [ -f $CFGDIR/groups ] && f=$CFGDIR/groups || f=$CFGDIR/groups.d/local.cfg; sed -n 's/^all:\(.*\)/\1/p' $f
list: [ -f $CFGDIR/groups ] && f=$CFGDIR/groups || f=$CFGDIR/groups.d/local.cfg; sed -n 's/^\([0-9A-Za-z_-]*\):.*/\1/p' $f

groups.d/local.cfg​

group1: node_a[01-10],node_b[01-05]
group2: node_c[01-05],node_d[01-03]

Tips​

Set a different config directory.​

export CLUSTERSHELL_CFGDIR=$HOME/.config/clustershell