# Ruby code works in an online IDE but not in logstash pipeline

**URL:** <https://discuss.elastic.co/t/ruby-code-works-in-an-online-ide-but-not-in-logstash-pipeline/273874>\
**Category:** Logstash\
**Created:** [May 24, 2021, 10:04pm UTC](https://discuss.elastic.co/t/ruby-code-works-in-an-online-ide-but-not-in-logstash-pipeline/273874 "2021-05-24T22:04:42Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![ElasticLiver](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/elasticliver/32/64869_2.png) [@ElasticLiver](https://discuss.elastic.co/u/ElasticLiver)\
**Post date:** [May 24, 2021, 10:04pm UTC](https://discuss.elastic.co/t/ruby-code-works-in-an-online-ide-but-not-in-logstash-pipeline/273874/1 "2021-05-24T22:04:42Z")

</div>

`Hi, Im using ruby scan method to get the values of some metrics in a line

examples:

```auto
73% virtual memory used,4442MB virtual memory free,0.10955 pages-sec`
0% swap space used,6125MB swap space free,0 pages-sec; 88% physical memory used,910MB physical memory free

```

this is my ruby code:

```auto
            ruby {
                code => "
                    testa = event.get('status')

                    vmu = testa.scan(/([^[:space:]]+)% virtual memory used,/).join()
                    vmf = testa.scan(/,([^[:space:]]+)MB virtual memory free,/).join()
                    ssu = testa.scan(/([^[:space:]]+)% swap space used,/).join()
                    ssf = testa.scan(/,([^[:space:]]+)MB swap space free,/).join()
                    pmu = testa.scan(/([^[:space:]]+)% physical memory used,/).join()
                    pmf = testa.scan(/,([^[:space:]]+)MB physical memory free/).join()

                    unless vmu.empty?
                    event.set('virtual_memused_per', 'vmu')
                    end
                    unless vmf.empty?
                    event.set('virtual_memfree_mb', 'vmf')
                    end
                    unless ssu.empty?
                    event.set('memory_swapused_per', 'ssu')
                    end
                    unless ssf.empty?
                    event.set('memory_swapfree', 'ssf')
                    end
                    unless pmu.empty?
                    event.set('memory_memused_per', 'pmu')
                    end
                    unless pmf.empty?
                    event.set('memory_memfree', 'pmf')
                    end
                            "
                }

```

But I only get zeros in the created fields, what Im doing wrong?

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [May 24, 2021, 10:37pm UTC](https://discuss.elastic.co/t/ruby-code-works-in-an-online-ide-but-not-in-logstash-pipeline/273874/2 "2021-05-24T22:37:11Z")

</div>

> [@ElasticLiver](#):
>
> `event.set('virtual_memused_per', 'vmu')`

That sets [virtual\_memused\_per] to the literal string `vmu`.

---

<div class="post-metadata">

**Author:** ![ElasticLiver](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/elasticliver/32/64869_2.png) [@ElasticLiver](https://discuss.elastic.co/u/ElasticLiver)\
**Post date:** [May 24, 2021, 10:47pm UTC](https://discuss.elastic.co/t/ruby-code-works-in-an-online-ide-but-not-in-logstash-pipeline/273874/3 "2021-05-24T22:47:41Z")

</div>

🤦‍♂️ thanks Badger!

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 21, 2021, 10:47pm UTC](https://discuss.elastic.co/t/ruby-code-works-in-an-online-ide-but-not-in-logstash-pipeline/273874/4 "2021-06-21T22:47:53Z")

</div>

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