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

Kubernetes–Limit your environmental impact

Reducing the carbon footprint and CO2 emission of our (cloud) workloads, is a responsibility of all of us. If you are running a Kubernetes cluster, have a look at Kube-Green . kube-green is a simple Kubernetes operator that automatically shuts down (some of) your pods when you don't need them. A single pod produces about 11 Kg CO2eq per year( here the calculation). Reason enough to give it a try! Installing kube-green in your cluster The easiest way to install the operator in your cluster is through kubectl. We first need to install a cert-manager: kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.14.5/cert-manager.yaml Remark: Wait a minute before you continue as it can take some time before the cert-manager is up & running inside your cluster. Now we can install the kube-green operator: kubectl apply -f https://github.com/kube-green/kube-green/releases/latest/download/kube-green.yaml Now in the namespace where we want t...
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

DevToys–A swiss army knife for developers

As a developer there are a lot of small tasks you need to do as part of your coding, debugging and testing activities.  DevToys is an offline windows app that tries to help you with these tasks. Instead of using different websites you get a fully offline experience offering help for a large list of tasks. Many tools are available. Here is the current list: Converters JSON <> YAML Timestamp Number Base Cron Parser Encoders / Decoders HTML URL Base64 Text & Image GZip JWT Decoder Formatters JSON SQL XML Generators Hash (MD5, SHA1, SHA256, SHA512) UUID 1 and 4 Lorem Ipsum Checksum Text Escape / Unescape Inspector & Case Converter Regex Tester Text Comparer XML Validator Markdown Preview Graphic Col...
Read more