[[discovery-azure]] === Azure Discovery Plugin The Azure Discovery plugin uses the Azure API for unicast discovery. [[discovery-azure-install]] [float] ==== Installation This plugin can be installed using the plugin manager: [source,sh] ---------------------------------------------------------------- sudo bin/plugin install discovery-azure ---------------------------------------------------------------- The plugin must be installed on every node in the cluster, and each node must be restarted after installation. [[discovery-azure-remove]] [float] ==== Removal The plugin can be removed with the following command: [source,sh] ---------------------------------------------------------------- sudo bin/plugin remove discovery-azure ---------------------------------------------------------------- The node must be stopped before removing the plugin. [[discovery-azure-usage]] ==== Azure Virtual Machine Discovery Azure VM discovery allows to use the azure APIs to perform automatic discovery (similar to multicast in non hostile multicast environments). Here is a simple sample configuration: [source,yaml] ---- cloud: azure: management: subscription.id: XXX-XXX-XXX-XXX cloud.service.name: es-demo-app keystore: path: /path/to/azurekeystore.pkcs12 password: WHATEVER type: pkcs12 discovery: type: azure ---- [IMPORTANT] .Binding the network host ============================================== It's important to define `network.host` as by default it's bound to `localhost`. You can use {ref}/modules-network.html[core network host settings]. For example `_non_loopback_` or `_en0_`. ============================================== [[discovery-azure-short]] ===== How to start (short story) * Create Azure instances * Install Elasticsearch * Install Azure plugin * Modify `elasticsearch.yml` file * Start Elasticsearch [[discovery-azure-settings]] ===== Azure credential API settings The following are a list of settings that can further control the credential API: [horizontal] `cloud.azure.management.keystore.path`:: /path/to/keystore `cloud.azure.management.keystore.type`:: `pkcs12`, `jceks` or `jks`. Defaults to `pkcs12`. `cloud.azure.management.keystore.password`:: your_password for the keystore `cloud.azure.management.subscription.id`:: your_azure_subscription_id `cloud.azure.management.cloud.service.name`:: your_azure_cloud_service_name [[discovery-azure-settings-advanced]] ===== Advanced settings The following are a list of settings that can further control the discovery: `discovery.azure.host.type`:: Either `public_ip` or `private_ip` (default). Azure discovery will use the one you set to ping other nodes. `discovery.azure.endpoint.name`:: When using `public_ip` this setting is used to identify the endpoint name used to forward requests to elasticsearch (aka transport port name). Defaults to `elasticsearch`. In Azure management console, you could define an endpoint `elasticsearch` forwarding for example requests on public IP on port 8100 to the virtual machine on port 9300. `discovery.azure.deployment.name`:: Deployment name if any. Defaults to the value set with `cloud.azure.management.cloud.service.name`. `discovery.azure.deployment.slot`:: Either `staging` or `production` (default). For example: [source,yaml] ---- discovery: type: azure azure: host: type: private_ip endpoint: name: elasticsearch deployment: name: your_azure_cloud_service_name slot: production ---- [[discovery-azure-long]] ==== Setup process for Azure Discovery We will expose here one strategy which is to hide our Elasticsearch cluster from outside. With this strategy, only VMs behind the same virtual port can talk to each other. That means that with this mode, you can use elasticsearch unicast discovery to build a cluster, using the Azure API to retrieve information about your nodes. [[discovery-azure-long-prerequisites]] ===== Prerequisites Before starting, you need to have: * A http://www.windowsazure.com/[Windows Azure account] * OpenSSL that isn't from MacPorts, specifically `OpenSSL 1.0.1f 6 Jan 2014` doesn't seem to create a valid keypair for ssh. FWIW, `OpenSSL 1.0.1c 10 May 2012` on Ubuntu 12.04 LTS is known to work. * SSH keys and certificate + -- You should follow http://azure.microsoft.com/en-us/documentation/articles/linux-use-ssh-key/[this guide] to learn how to create or use existing SSH keys. If you have already did it, you can skip the following. Here is a description on how to generate SSH keys using `openssl`: [source,sh] ---- # You may want to use another dir than /tmp cd /tmp openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout azure-private.key -out azure-certificate.pem chmod 600 azure-private.key azure-certificate.pem openssl x509 -outform der -in azure-certificate.pem -out azure-certificate.cer ---- Generate a keystore which will be used by the plugin to authenticate with a certificate all Azure API calls. [source,sh] ---- # Generate a keystore (azurekeystore.pkcs12) # Transform private key to PEM format openssl pkcs8 -topk8 -nocrypt -in azure-private.key -inform PEM -out azure-pk.pem -outform PEM # Transform certificate to PEM format openssl x509 -inform der -in azure-certificate.cer -out azure-cert.pem cat azure-cert.pem azure-pk.pem > azure.pem.txt # You MUST enter a password! openssl pkcs12 -export -in azure.pem.txt -out azurekeystore.pkcs12 -name azure -noiter -nomaciter ---- Upload the `azure-certificate.cer` file both in the elasticsearch Cloud Service (under `Manage Certificates`), and under `Settings -> Manage Certificates`. IMPORTANT: When prompted for a password, you need to enter a non empty one. See this http://www.windowsazure.com/en-us/manage/linux/how-to-guides/ssh-into-linux/[guide] for more details about how to create keys for Azure. Once done, you need to upload your certificate in Azure: * Go to the https://account.windowsazure.com/[management console]. * Sign in using your account. * Click on `Portal`. * Go to Settings (bottom of the left list) * On the bottom bar, click on `Upload` and upload your `azure-certificate.cer` file. You may want to use http://www.windowsazure.com/en-us/develop/nodejs/how-to-guides/command-line-tools/[Windows Azure Command-Line Tool]: -- * Install https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manager[NodeJS], for example using homebrew on MacOS X: + [source,sh] ---- brew install node ---- * Install Azure tools + [source,sh] ---- sudo npm install azure-cli -g ---- * Download and import your azure settings: + [source,sh] ---- # This will open a browser and will download a .publishsettings file azure account download # Import this file (we have downloaded it to /tmp) # Note, it will create needed files in ~/.azure. You can remove azure.publishsettings when done. azure account import /tmp/azure.publishsettings ---- [[discovery-azure-long-instance]] ===== Creating your first instance You need to have a storage account available. Check http://www.windowsazure.com/en-us/develop/net/how-to-guides/blob-storage/#create-account[Azure Blob Storage documentation] for more information. You will need to choose the operating system you want to run on. To get a list of official available images, run: [source,sh] ---- azure vm image list ---- Let's say we are going to deploy an Ubuntu image on an extra small instance in West Europe: [horizontal] Azure cluster name:: `azure-elasticsearch-cluster` Image:: `b39f27a8b8c64d52b05eac6a62ebad85__Ubuntu-13_10-amd64-server-20130808-alpha3-en-us-30GB` VM Name:: `myesnode1` VM Size:: `extrasmall` Location:: `West Europe` Login:: `elasticsearch` Password:: `password1234!!` Using command line: [source,sh] ---- azure vm create azure-elasticsearch-cluster \ b39f27a8b8c64d52b05eac6a62ebad85__Ubuntu-13_10-amd64-server-20130808-alpha3-en-us-30GB \ --vm-name myesnode1 \ --location "West Europe" \ --vm-size extrasmall \ --ssh 22 \ --ssh-cert /tmp/azure-certificate.pem \ elasticsearch password1234\!\! ---- You should see something like: [source,text] ---- info: Executing command vm create + Looking up image + Looking up cloud service + Creating cloud service + Retrieving storage accounts + Configuring certificate + Creating VM info: vm create command OK ---- Now, your first instance is started. [TIP] .Working with SSH =============================================== You need to give the private key and username each time you log on your instance: [source,sh] ---- ssh -i ~/.ssh/azure-private.key elasticsearch@myescluster.cloudapp.net ---- But you can also define it once in `~/.ssh/config` file: [source,text] ---- Host *.cloudapp.net User elasticsearch StrictHostKeyChecking no UserKnownHostsFile=/dev/null IdentityFile ~/.ssh/azure-private.key ---- =============================================== Next, you need to install Elasticsearch on your new instance. First, copy your keystore to the instance, then connect to the instance using SSH: [source,sh] ---- scp /tmp/azurekeystore.pkcs12 azure-elasticsearch-cluster.cloudapp.net:/home/elasticsearch ssh azure-elasticsearch-cluster.cloudapp.net ---- Once connected, install Elasticsearch: [source,sh] ---- # Install Latest Java version # Read http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html for details sudo add-apt-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install oracle-java7-installer # If you want to install OpenJDK instead # sudo apt-get update # sudo apt-get install openjdk-7-jre-headless # Download Elasticsearch curl -s https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-2.0.0.deb -o elasticsearch-2.0.0.deb # Prepare Elasticsearch installation sudo dpkg -i elasticsearch-2.0.0.deb ---- Check that elasticsearch is running: [source,sh] ---- curl http://localhost:9200/ ---- This command should give you a JSON result: [source,javascript] ---- { "status" : 200, "name" : "Living Colossus", "version" : { "number" : "2.0.0", "build_hash" : "a46900e9c72c0a623d71b54016357d5f94c8ea32", "build_timestamp" : "2014-02-12T16:18:34Z", "build_snapshot" : false, "lucene_version" : "5.1" }, "tagline" : "You Know, for Search" } ---- [[discovery-azure-long-plugin]] ===== Install elasticsearch cloud azure plugin [source,sh] ---- # Stop elasticsearch sudo service elasticsearch stop # Install the plugin sudo /usr/share/elasticsearch/bin/plugin install discovery-azure # Configure it sudo vi /etc/elasticsearch/elasticsearch.yml ---- And add the following lines: [source,yaml] ---- # If you don't remember your account id, you may get it with `azure account list` cloud: azure: management: subscription.id: your_azure_subscription_id cloud.service.name: your_azure_cloud_service_name keystore: path: /home/elasticsearch/azurekeystore.pkcs12 password: your_password_for_keystore discovery: type: azure # Recommended (warning: non durable disk) # path.data: /mnt/resource/elasticsearch/data ---- Restart elasticsearch: [source,sh] ---- sudo service elasticsearch start ---- If anything goes wrong, check your logs in `/var/log/elasticsearch`. [[discovery-azure-scale]] ==== Scaling Out! You need first to create an image of your previous machine. Disconnect from your machine and run locally the following commands: [source,sh] ---- # Shutdown the instance azure vm shutdown myesnode1 # Create an image from this instance (it could take some minutes) azure vm capture myesnode1 esnode-image --delete # Note that the previous instance has been deleted (mandatory) # So you need to create it again and BTW create other instances. azure vm create azure-elasticsearch-cluster \ esnode-image \ --vm-name myesnode1 \ --location "West Europe" \ --vm-size extrasmall \ --ssh 22 \ --ssh-cert /tmp/azure-certificate.pem \ elasticsearch password1234\!\! ---- [TIP] ========================================= It could happen that azure changes the endpoint public IP address. DNS propagation could take some minutes before you can connect again using name. You can get from azure the IP address if needed, using: [source,sh] ---- # Look at Network `Endpoints 0 Vip` azure vm show myesnode1 ---- ========================================= Let's start more instances! [source,sh] ---- for x in $(seq 2 10) do echo "Launching azure instance #$x..." azure vm create azure-elasticsearch-cluster \ esnode-image \ --vm-name myesnode$x \ --vm-size extrasmall \ --ssh $((21 + $x)) \ --ssh-cert /tmp/azure-certificate.pem \ --connect \ elasticsearch password1234\!\! done ---- If you want to remove your running instances: [source,sh] ---- azure vm delete myesnode1 ----