77 lines
2.2 KiB
Plaintext
77 lines
2.2 KiB
Plaintext
The cluster utilities are script allowing to work in parallel with a
|
|
number of remote hosts, using utilities such as Parallel SSH (pssh) or
|
|
fping. They all take as first and mandatory positional argument a host
|
|
list name “NAME”; the list will be searched according to the following
|
|
pattern:
|
|
|
|
``` $HOME/.config/cluster/NAME.lst
|
|
|
|
For example, one can call the cluster-ping.sh script typing:
|
|
|
|
``` cluster-ping my_hosts
|
|
|
|
to use the hosts' file $HOME/.config/cluster/my_hosts.lst
|
|
|
|
The format of such a .lst file is one line per host name or IP address,
|
|
for example:
|
|
|
|
```
|
|
192.168.42.1
|
|
192.168.42.3
|
|
priam
|
|
```
|
|
|
|
The scrits based on SSH use the local user's login name as remote login;
|
|
this can be changed using the ``-l`` option, that must appear before the
|
|
hosts' list on the command line, for example:
|
|
|
|
``` cluster-run -l root openwrt_machines opkg install screen
|
|
|
|
The provided scripts are detailed in the sequel.
|
|
|
|
|
|
= cluster-ping.sh =
|
|
|
|
Test the connectivity with the hosts of the list by sending them a ICMP
|
|
echo packet.
|
|
|
|
Dependency: fping
|
|
|
|
|
|
= cluster-ssh.sh =
|
|
|
|
Open a GNU Screen tab with an interactive SSH session for each host of
|
|
the hosts' list. Must be run inside of an existing Screen.
|
|
|
|
Dependencies: screen, ssh
|
|
|
|
|
|
= cluster-run.sh =
|
|
|
|
Run the same command on every host of the hosts' list.
|
|
|
|
Dependency: parallel-ssh (pssh)
|
|
|
|
|
|
= cluster-deploy.sh =
|
|
|
|
Deploy one or more files in parallel on every host of the hosts' list.
|
|
The files are copied in the remote user's home directory.
|
|
|
|
By default, the files are transfered one by one, to be sure to notice
|
|
the errors for each file (bad permissions, out of space, etc.), but the
|
|
-P option allows to transfer them all together.
|
|
|
|
While it is possible to transfer directories with the default option, to
|
|
synchronise directories one would rather use the -r option, that uses
|
|
prsync rather than pscp to transfer the files. With the -R option, the
|
|
remote files that are not in the local copy will be deleted (rsync's
|
|
--delete option). With both options, the transfer is done with rsync's
|
|
-a (archive) option.
|
|
|
|
Please note that unlike rsync, prsync cannot handle multiple local
|
|
files, therefore the -P option is ignored when passed along with -r or
|
|
-R.
|
|
|
|
Dependencies: parallel-scp (pscp), parallel-rsync (prsync)
|