Custom Ohai Plugin Weirdness

Chef Infra (archive)
1

I’ve been trying to write an ohai plugin to pull a piece of data from a
URL. The plugin looks like this:

require 'rexml/document’
include REXML
Ohai.plugin(:SliceLatestVersion) do
provides "slice/latest_version"
def create_objects
slice Mash.new
end
collect_data(:default) do
create_objects
uri = URI.parse(“
https://172.30.1.213/artifactory/simple/slice-stable-local/com/slice/core/slice-dt/maven-metadata.xml
”)
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE
request = Net::HTTP::Get.new(uri.request_uri)
response = http.request(request)
@data = response.body
xmldoc = Document.new data
latest = XPath.first(xmldoc, “//metadata/versioning/latest”)
slice[‘latest_version’] = “B” #latest.text
end
end

Now, here’s the weird part. The mash slice ends up being set to {}. This
should not happen considering I’m setting it to a literal value there right
at the end. If I remove all that HTTP code before it, the mash slice
becomes { ‘latest_version’: ‘B’ }. How is this possible?

Doug

2

I suspect the http.request is throwing an exception (so it does not execute the subsequent lines).

Regards,
Christine

On Jun 7, 2015, at 12:58 PM, Douglas Garstang doug.garstang@gmail.com wrote:

I've been trying to write an ohai plugin to pull a piece of data from a URL. The plugin looks like this:

require 'rexml/document'
include REXML
Ohai.plugin(:SliceLatestVersion) do
provides "slice/latest_version"
def create_objects
slice Mash.new
end
collect_data(:default) do
create_objects
uri = URI.parse("https://172.30.1.213/artifactory/simple/slice-stable-local/com/slice/core/slice-dt/maven-metadata.xml")
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE
request = Net::HTTP::Get.new(uri.request_uri)
response = http.request(request)
@data = response.body
xmldoc = Document.new data
latest = XPath.first(xmldoc, "//metadata/versioning/latest")
slice['latest_version'] = "B" #latest.text
end
end

Now, here's the weird part. The mash slice ends up being set to {}. This should not happen considering I'm setting it to a literal value there right at the end. If I remove all that HTTP code before it, the mash slice becomes { 'latest_version': 'B' }. How is this possible?

Doug