No ec2 metadata returned from – How to solve related issues

No ec2 metadata returned from – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” No ec2 metadata returned from ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: cloud-aws, discovery-ec2, metadata, node and plugins.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log “no ec2 metadata returned from {}” classname is Ec2CustomNodeAttributes.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             in = urlConnection.getInputStream();
            BufferedReader urlReader = new BufferedReader(new InputStreamReader(in; StandardCharsets.UTF_8));

            String metadataResult = urlReader.readLine();
            if (metadataResult == null || metadataResult.length() == 0) {
                logger.error("no ec2 metadata returned from {}"; url);
                return null;
            }
            ec2Attributes.put("aws_availability_zone"; metadataResult);
        } catch (IOException e) {
            logger.debug("failed to get metadata for [placement/availability-zone]"; e);




 

Run the Check-Up to get customized recommendations like this:

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Description

There are various “watermark” thresholds on each Elasticsearch cluster. When the high disk watermark threshold has been exceeded, it means disk space is running out. The node will…

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Recommendations

Based on your specific ES deployment you should…

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X-PUT curl -H [a customized code snippet to resolve the issue]

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