[user@host ~]$ sudo sensu-install -p ansible
[SENSU-INSTALL] installing Sensu plugins ...
[SENSU-INSTALL] determining if Sensu plugin gem 'sensu-plugins-ansible' is already installed ...
false
[SENSU-INSTALL] Sensu plugin gems to be installed: ["sensu-plugins-ansible"]
[SENSU-INSTALL] installing Sensu plugin gem 'sensu-plugins-ansible'
Fetching: sensu-plugins-ansible-0.0.4.gem (100%)
You can use the embedded Ruby by setting EMBEDDED_RUBY=true in /etc/default/sensu
Successfully installed sensu-plugins-ansible-0.0.4
1 gem installed
[SENSU-INSTALL] successfully installed Sensu plugins: ["ansible"]
The ansible plugin does not seem to be installed in the plugins directory.
[user@host ~]$ ls /etc/sensu/plugins
check-apache.rb
Attempts to solve the issue
Attempt one
[user@host ~]$ sudo -u sensu sensu-install -p ssl
[SENSU-INSTALL] installing Sensu plugins ...
[SENSU-INSTALL] determining if Sensu plugin gem 'sensu-plugins-ssl' is already installed ...
false
[SENSU-INSTALL] Sensu plugin gems to be installed: ["sensu-plugins-ssl"]
[SENSU-INSTALL] installing Sensu plugin gem 'sensu-plugins-ssl'
Fetching: unf_ext-0.0.7.2.gem (100%)
ERROR: While executing gem ... (Errno::ENOENT)
No such file or directory @ rb_sysopen - /opt/sensu/.gem/ruby/2.3.0/cache/unf_ext-0.0.7.2.gem
[SENSU-INSTALL] failed to install Sensu plugin gem 'sensu-plugins-ssl'
[SENSU-INSTALL] you can run the sensu-install command again with --verbose for more info
[SENSU-INSTALL] please take note of any failure messages above
[SENSU-INSTALL] make sure you have build tools installed (e.g. gcc)
[SENSU-INSTALL] trying to determine the Sensu plugin homepage for sensu-plugins-ssl ...
homepage: https://github.com/sensu-plugins/sensu-plugins-ssl
Attempt two
Following the advice, i.e. you can run the sensu-install command again with --verbose for more info
from the previous attempt resulted in:
[user@host ~]$ sudo sensu-install -p http --verbose
[SENSU-INSTALL] installing Sensu plugins ...
[SENSU-INSTALL] provided Sensu plugins: ["http"]
[SENSU-INSTALL] compiled Sensu plugin gems: ["sensu-plugins-http"]
[SENSU-INSTALL] determining if Sensu plugin gem 'sensu-plugins-http' is already installed ...
[SENSU-INSTALL] gem list -i sensu-plugins-http
false
[SENSU-INSTALL] Sensu plugin gem 'sensu-plugins-http' has not been installed
[SENSU-INSTALL] Sensu plugin gems to be installed: ["sensu-plugins-http"]
[SENSU-INSTALL] installing Sensu plugin gem 'sensu-plugins-http'
[SENSU-INSTALL] gem install sensu-plugins-http --no-ri --no-rdoc --verbose
HEAD https://api.rubygems.org/api/v1/dependencies
200 OK
...
/opt/sensu/embedded/bin/metrics-http-json-deep.rb
/opt/sensu/embedded/bin/check-http-json.rb
/opt/sensu/embedded/bin/metrics-curl.rb
/opt/sensu/embedded/bin/check-last-modified.rb
/opt/sensu/embedded/bin/check-https-cert.rb
/opt/sensu/embedded/bin/check-http-cors.rb
/opt/sensu/embedded/bin/check-head-redirect.rb
/opt/sensu/embedded/bin/metrics-http-json.rb
/opt/sensu/embedded/bin/check-http.rb
You can use the embedded Ruby by setting EMBEDDED_RUBY=true in /etc/default/sensu
Successfully installed sensu-plugins-http-1.0.0
13 gems installed
[SENSU-INSTALL] successfully installed Sensu plugins: ["http"]
Plugins are installed and the checks are executable:
[user@host ~]$ /opt/sensu/embedded/bin/check-http.rb
CheckHttp UNKNOWN: No URL specified
Best Answer
Concise
Yes, it makes sense to use
sensu-install
, because:/etc/sensu/plugins
sensu-install
command modifies the path so that the plugins can be found by sensuVerbose
Although the
sensu-install
command installs the checks in a different directory than/etc/sensu/plugins
it is not required in order to run plugins. As the Sensu Plugin documentation indicates:the
sensu-install
command modifies the$PATH
so that the check could be found by Sensu by defining the check, e.g.check-http.rb
instead of the full path, e.g./opt/sensu/embedded/bin/check-http.rb