itamae/cookbooks/prometheus-exporters/node_exporter_install.rb

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node_exporter_url = ''
node_exporter_bin = ''
tag = ''
vtag = ''
# Calculate the Download URL:
begin
require 'net/http'
uri = URI.parse('https://github.com/prometheus/node_exporter/releases/latest')
Timeout.timeout(3) do
response = Net::HTTP.get_response(uri)
vtag = $1 if response['location'] =~ %r{tag\/(v\d+\.\d+\.\d+)}
tag = vtag.sub(/^v/, '')
node_exporter_bin = "#{node['node_exporter']['prefix']}#{tag}#{node['node_exporter']['postfix']}"
node_exporter_url = "#{node['node_exporter']['url']}/#{vtag}/#{node_exporter_bin}"
end
rescue
# Abort the chef client process:
raise 'Cannot connect to http://github.com.'
end
# バージョン確認して、アップデート必要かどうか確認
result = run_command("node_exporter --version 2>&1 | grep #{tag}", error: false)
if result.exit_status != 0
# Download:
TMP = "/tmp/#{node_exporter_bin}"
execute "wget #{node_exporter_url} -O #{TMP}"
# Install:
directory node['node_exporter']['storage'] do
owner 'root'
group 'root'
mode '755'
end
execute "tar zxf #{TMP} -C #{node['node_exporter']['storage']} --strip-components 1"
# Change Owner and Permissions:
file "#{node['node_exporter']['storage']}node_exporter" do
owner 'root'
group 'root'
mode '755'
end
# Create Link
link "#{node['node_exporter']['location']}node_exporter" do
to "#{node['node_exporter']['storage']}node_exporter"
end
end