Skip to main content

ElasticSearch - Exposing your ElasticSearch instance

ElasticSearch is safe out-of-the-box. If you do a new installation, your ElasticSearch instance is only listening to internal traffic. If you want to make the ElasticSearch API’s accessible outside the VM where you installed it, you have to take some extra steps:

  • Go to the ElasticSearch folder that you configured to store your index and configuration data.
  • Open the ElasticSearch.yml file inside the config folder.
  • Set the network.host value to a non-loopback address. I’ll use 0.0.0.0 but a specific IP address is of course better:

network.host: 0.0.0.0

If you know restart your ElasticSearch instance, you’ll notice that we are not there yet. The node fails to start with the following error message:

[2019-07-10T14:34:59,782][INFO ][o.e.d.DiscoveryModule    ] [ESSRV1] using discovery type [zen] and seed hosts providers [settings]

[2019-07-10T14:35:00,436][INFO ][o.e.n.Node               ] [ESSRV1] initialized

[2019-07-10T14:35:00,436][INFO ][o.e.n.Node               ] [ESSRV1] starting ...

[2019-07-10T14:35:00,634][INFO ][o.e.t.TransportService   ] [ESSRV1] publish_address {10.1.100.236:9300}, bound_addresses {[::]:9300}

[2019-07-10T14:35:00,643][INFO ][o.e.b.BootstrapChecks    ] [ESSRV1] bound or publishing to a non-loopback address, enforcing bootstrap checks

[2019-07-10T14:35:00,647][ERROR][o.e.b.Bootstrap          ] [ESSRV1] node validation exception

[1] bootstrap checks failed

[1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured

[2019-07-10T14:35:00,650][INFO ][o.e.n.Node               ] [ESSRV1] stopping ...

[2019-07-10T14:35:00,666][INFO ][o.e.n.Node               ] [ESSRV1] stopped

[2019-07-10T14:35:00,666][INFO ][o.e.n.Node               ] [ESSRV1] closing ...

[2019-07-10T14:35:00,678][INFO ][o.e.n.Node               ] [ESSRV1] closed

The moment you provided a custom setting for network.host, Elasticsearch assumes that you are moving from development mode to production mode, and upgrades a number of system startup checks from warnings to exceptions. So we have to configure one extra setting; the initial_master_nodes:

cluster.initial_master_nodes: node-1

Labels:

Popular posts from this blog

Podman– Command execution failed with exit code 125

After updating WSL on one of the developer machines, Podman failed to work. When we took a look through Podman Desktop, we noticed that Podman had stopped running and returned the following error message: Error: Command execution failed with exit code 125 Here are the steps we tried to fix the issue: We started by running podman info to get some extra details on what could be wrong: >podman info OS: windows/amd64 provider: wsl version: 5.3.1 Cannot connect to Podman. Please verify your connection to the Linux system using `podman system connection list`, or try `podman machine init` and `podman machine start` to manage a new Linux VM Error: unable to connect to Podman socket: failed to connect: dial tcp 127.0.0.1:2655: connectex: No connection could be made because the target machine actively refused it. That makes sense as the podman VM was not running. Let’s check the VM: >podman machine list NAME         ...
Read more

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.
Read more

VS Code Planning mode

After the introduction of Plan mode in Visual Studio , it now also found its way into VS Code. Planning mode, or as I like to call it 'Hannibal mode', extends GitHub Copilot's Agent Mode capabilities to handle larger, multi-step coding tasks with a structured approach. Instead of jumping straight into code generation, Planning mode creates a detailed execution plan. If you want more details, have a look at my previous post . Putting plan mode into action VS Code takes a different approach compared to Visual Studio when using plan mode. Instead of a configuration setting that you can activate but have limited control over, planning is available as a separate chat mode/agent: I like this approach better than how Visual Studio does it as you have explicit control when plan mode is activated. Instead of immediately diving into execution, the plan agent creates a plan and asks some follow up questions: You can further edit the plan by clicking on ‘Open in Editor’: ...
Read more