安装Elasticsearch 7失败：依赖冲突问题求助

Hey there, let's work through the problems you ran into while upgrading Elasticsearch from 6 to 7 using RPM packages. I notice two key issues in your output: a GPG signature warning and a dependency conflict error. Here's how to resolve them and complete the upgrade properly.

1. First, Fix the GPG Signature Warning #

That NOKEY warning pops up because your system doesn't recognize Elastic's official signing key. Let's import it first to avoid security warnings and potential issues later:

sudo rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch

2. Resolve the Dependency Conflict Error #

The error elasticsearch < 7.0.0 is obsoleted by elasticsearch-0:7.0.0-1.x86_64 happens because you used rpm --install—this command is for fresh installs, not upgrades. Since you already have Elasticsearch 6 installed, you need to use the upgrade flag instead.

Option 1: Direct Upgrade (Recommended) #

Use the -Uvh flag to upgrade your existing installation. This will replace the old version while preserving your configuration files (though you’ll want to check for breaking changes in ES7 afterward):

sudo rpm -Uvh elasticsearch-7.0.0-x86_64.rpm

Option 2: Uninstall Old Version First (If Upgrade Fails) #

If the direct upgrade hits unexpected snags, you can uninstall the old version first—make sure to back up your data and config files first!:

• Stop the Elasticsearch service:

  sudo systemctl stop elasticsearch
  

• Back up your data directory (default is /var/lib/elasticsearch) and config file (/etc/elasticsearch/elasticsearch.yml):

  sudo cp -r /var/lib/elasticsearch /var/lib/elasticsearch_backup
  sudo cp /etc/elasticsearch/elasticsearch.yml /etc/elasticsearch/elasticsearch.yml.backup
  

• Uninstall the old version:

  sudo rpm -e elasticsearch
  

• Install the new RPM:

  sudo rpm --install elasticsearch-7.0.0-x86_64.rpm
  

3. Post-Upgrade Steps #

After installing ES7:

• Review your elasticsearch.yml file—ES7 has several breaking changes from ES6 (e.g., removed type mappings, adjusted network settings). You’ll need to update any deprecated settings.
• Start the Elasticsearch service and check its status:

  sudo systemctl start elasticsearch
  sudo systemctl status elasticsearch
  

• Verify the upgrade worked by checking the version:

  curl -XGET 'http://localhost:9200/'
  

Quick Recap of Your Original Issue #

Your core problem was using rpm --install instead of rpm -Uvh for an upgrade. The RPM installer saw the existing ES6 package and threw a conflict because ES7 obsoletes all older versions. Adding the upgrade flag tells RPM to replace the old package instead of trying to install alongside it.

内容的提问来源于stack exchange，提问作者Andy Bajka