27 lines
957 B
Markdown
27 lines
957 B
Markdown
[[!meta title="How to find and execute stuff on all hosts?"]]
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## Motivation
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Assume that you are managing a pretty large infrastructure of hosts,
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sometimes there is a need to execute a command on all of them.
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The big question is, where to find out, which hosts exist.
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## Solution
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The usual approach is to invent some kind of centralised daemon that collects
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or searches for available hosts. There is a way simpler solution available in
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my situation, which may help you as well:
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We do have a monitoring infrastructure, to which all hosts transmit their
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configuration. The configuration is stored containing the full hostname
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(like **foo.bar.local.ch**) plus the .cfg suffix.
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Thus a script that can be used to execute something on all hosts (sequentially though)
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can look like this:
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for host in $(ssh monitoring01 "cd /opt/icinga/etc/hosts.d; ls"); do
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host=${host%.cfg}
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ssh "root@$host" "$@"
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done
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[[!tag sysadmin localch unix]]
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