{"id":7718,"date":"2018-10-07T15:46:00","date_gmt":"2018-10-07T15:46:00","guid":{"rendered":"https:\/\/octopuscs.com\/?p=7718"},"modified":"2024-09-27T15:48:50","modified_gmt":"2024-09-27T15:48:50","slug":"create-multiple-instances-with-a-single-openstack-cli-command","status":"publish","type":"post","link":"https:\/\/octopuscs.com\/?p=7718","title":{"rendered":"Create Multiple Instances with a single Openstack CLI Command"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"7718\" class=\"elementor elementor-7718\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-23187ff elementor-section-boxed elementor-section-height-default elementor-section-height-default rt-parallax-bg-no\" data-id=\"23187ff\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-22e9d77\" data-id=\"22e9d77\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-aa36e14 elementor-widget elementor-widget-text-editor\" data-id=\"aa36e14\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"main\"><main class=\"page-content-alt-2\"><div class=\"grid-row\"><div class=\"grid-col grid-col-12\"><article id=\"blog\" class=\"blog blog-1\"><div class=\"grid\"><div class=\"item blog-item-left\"><div class=\"markdown\"><h3>Multiple instances in\u00a0<a href=\"http:\/\/octopuscs.com\/services\/openstack-deployment\">OpenStack<\/a>\u00a0CLI<\/h3><p>\u00a0<\/p><p>I have been developing Infrastructure as code.\u00a0<a href=\"http:\/\/octopuscs.com\/services\/openstack-deployment\">Openstack<\/a>\u00a0is getting more powerful and popular everyday. You quickly get to a point when you need multiple instances. I am presently installing\u00a0<a href=\"https:\/\/web.archive.org\/web\/20230401144959mp_\/http:\/\/octopuscs.com\/services\/openshift-deployment\">Openshift<\/a>, which rfequires several instances. Here I will show you how to make multiple instances of the same size and flavor using Heat Stacks.<\/p><p>Basically all you need to do is to call your favorite heat stack from another heat stack that uses\u00a0<\/p><pre><code>OS::Heat::ResourceGroup .<\/code><\/pre><h2>Single Openstack Instance<\/h2><p>First, here is a comprehensive stack that creates the single instance.<\/p><p><strong>create-instance.yaml<\/strong><\/p><pre>heat_template_version: ocata\n\ndescription: &gt;\n  HOT template to create one small VM to test the compute deployment\n\nparameters:\n  image:\n    type: string\n    default: 'rhel-server-7.5-update-4-x86_64-kvm.qcow2'\n  flavor:\n    type: string\n    default: 'M5 Large'\n  availability_zone:\n    type: string\n    default: nova\n  net_mng:\n    type: string\n    default: YOUR-NETWORK\n  net_data:\n    type: string\n    default: None\n  key_name:\n    type: string\n    default: YOUR-KEY\n\nconditions:\n  have_data: {not: {equals: [{get_param: net_data}, \"None\"]}}\n\nresources:\n  vm_name:\n    type: OS::Heat::Value\n    properties:\n      type: string\n      value: {get_param: 'OS::stack_name'}\n\n  fw_open_ping_ssh:\n    type: OS::Neutron::SecurityGroup\n    properties:\n      name: fw_open_ping_ssh\n      description: Ping and SSH\n      rules:\n      - protocol: icmp\n      - protocol: tcp\n        port_range_min: 1\n        port_range_max: 65535\n\n  mng_port:\n    type: OS::Neutron::Port\n    properties:\n      network: {get_param: net_mng}\n      name:\n        list_join: ['-', [{get_attr: [vm_name, value]}, 'mng']]\n\n  data_port:\n    type: OS::Neutron::Port\n    condition: have_data\n    properties:\n      network: {get_param: net_data}\n      binding:vnic_type: direct\n      port_security_enabled: false\n      name:\n        list_join: ['-', [{get_attr: [vm_name, value]}, 'data']]\n\n  ports:\n    type: OS::Heat::Value\n    properties:\n      type: comma_delimited_list\n      value:\n        filter:\n          - [\"none\"]\n          -\n            - {get_resource: mng_port}\n            - if:\n                - \"have_data\"\n                - {get_resource: data_port}\n                - \"none\"\n\n  hostname_config:\n    type: OS::Heat::CloudConfig\n    properties:\n      cloud_config:\n        merge_how: 'dict(recurse_array,no_replace)+list(append)'\n        hostname:\n          str_replace:\n            params:\n              <strong>hostname<\/strong>: {get_attr: [vm_name, value]}\n            template: <strong>hostname<\/strong>\n\n  server_init:\n    type: OS::Heat::MultipartMime\n    properties:\n      parts:\n        - config: {get_resource: hostname_config}\n\n  server:\n    type: OS::Nova::Server\n    properties:\n      image: {get_param: image}\n      flavor: {get_param: flavor}\n      availability_zone: {get_param: availability_zone}\n      name: {get_attr: [vm_name, value]}\n      networks:\n        repeat:\n          for_each:\n            &lt;%port%&gt;: {get_attr: [ports, value]}\n          template:\n            port: &lt;%port%&gt;\n          permutations: false\n      config_drive: true\n      key_name: {get_param: key_name}\n      user_data_format: RAW\n      user_data: {get_resource: server_init}\n<\/pre><p>You can launch this with the CLI command:<\/p><pre>\u00a0openstack stack create --template create-instance.yaml STACK-NAME --wait<\/pre><h2>Create Mutiple Instances\u00a0<\/h2><p>When you desire multiple instances run this as a nested stack from another template.<\/p><p>multiple-instances.yaml<\/p><pre>heat_template_version: 2013-05-23\n\nresources:\n  rg:\n    type: OS::Heat::ResourceGroup\n    properties:\n      count: 5\n      resource_def: {type:  create-instance.yaml}\n<\/pre><p><strong>Note that the last line calls the name of your file that launches the single instance.<\/strong><\/p><p>You can replace &#8220;count&#8221; and &#8220;resource_def&#8221; with parameters called from CLI, but here we just fil them in the template.<\/p><p>To launch 5 instances from your cli via ssh.<\/p><pre>openstack stack create --template\u00a0multiple-instances.yaml YOUR-STACKNAME --wait<\/pre><p>Be careful not give too long a stack name since Openstack will add to the a number followed by a random string to each server name.<\/p><\/div><\/div><\/div><\/article><\/div><\/div><\/main><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Multiple instances in\u00a0OpenStack\u00a0CLI \u00a0 I have been developing Infrastructure as code.\u00a0Openstack\u00a0is getting more powerful and popular everyday. You quickly get to a point when you need multiple instances. I am presently installing\u00a0Openshift, which rfequires several instances. Here I will show you how to make multiple instances of the same size and flavor using Heat Stacks. [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":7579,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[128,84,73],"class_list":["post-7718","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","tag-cli","tag-linux","tag-openstack"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Create Multiple Instances with a single Openstack CLI Command - Octopus Computer Solutions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/octopuscs.com\/?p=7718\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Create Multiple Instances with a single Openstack CLI Command - Octopus Computer Solutions\" \/>\n<meta property=\"og:description\" content=\"Multiple instances in\u00a0OpenStack\u00a0CLI \u00a0 I have been developing Infrastructure as code.\u00a0Openstack\u00a0is getting more powerful and popular everyday. You quickly get to a point when you need multiple instances. I am presently installing\u00a0Openshift, which rfequires several instances. Here I will show you how to make multiple instances of the same size and flavor using Heat Stacks. [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/octopuscs.com\/?p=7718\" \/>\n<meta property=\"og:site_name\" content=\"Octopus Computer Solutions\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/octopuscs\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-10-07T15:46:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-09-27T15:48:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/octopuscs.com\/wp-content\/uploads\/2024\/09\/taylor-vick-M5tzZtFCOfs-unsplash-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1437\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Daniel Kallner\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@octopuscs\" \/>\n<meta name=\"twitter:site\" content=\"@octopuscs\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daniel Kallner\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/octopuscs.com\\\/?p=7718#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/octopuscs.com\\\/?p=7718\"},\"author\":{\"name\":\"Daniel Kallner\",\"@id\":\"https:\\\/\\\/octopuscs.com\\\/#\\\/schema\\\/person\\\/b10d071ebda1e3f3d371a8ef9eb1ea73\"},\"headline\":\"Create Multiple Instances with a single Openstack CLI Command\",\"datePublished\":\"2018-10-07T15:46:00+00:00\",\"dateModified\":\"2024-09-27T15:48:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/octopuscs.com\\\/?p=7718\"},\"wordCount\":201,\"publisher\":{\"@id\":\"https:\\\/\\\/octopuscs.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/octopuscs.com\\\/?p=7718#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/octopuscs.com\\\/wp-content\\\/uploads\\\/2024\\\/09\\\/taylor-vick-M5tzZtFCOfs-unsplash-scaled.jpg\",\"keywords\":[\"cli\",\"linux\",\"openstack\"],\"articleSection\":[\"Articles\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/octopuscs.com\\\/?p=7718\",\"url\":\"https:\\\/\\\/octopuscs.com\\\/?p=7718\",\"name\":\"Create Multiple Instances with a single Openstack CLI Command - 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