{"id":348,"date":"2022-08-04T22:25:57","date_gmt":"2022-08-04T22:25:57","guid":{"rendered":"http:\/\/192.168.1.102\/?p=348"},"modified":"2022-10-19T18:31:57","modified_gmt":"2022-10-19T18:31:57","slug":"index-templates","status":"publish","type":"post","link":"https:\/\/192.168.12.139\/blog\/index-templates","title":{"rendered":"Index Templates"},"content":{"rendered":"<h2 cid=\"n17\" mdtype=\"paragraph\">1. Overview<\/h2>\n<p><span data-preserver-spaces=\"true\">Index templates are the configurations of indices to be created. However, the configuration of an index can be altered after it is created individually.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">Whether an index is created manually or automatically while indexing a document, the new index will be created in the light of the template settings.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">A template can be either a\u00a0<\/span><strong><span data-preserver-spaces=\"true\">composable index template<\/span><\/strong><span data-preserver-spaces=\"true\">\u00a0(introduced in\u00a0<\/span><em><span data-preserver-spaces=\"true\">Elasticsearch 7.8<\/span><\/em><span data-preserver-spaces=\"true\">, index template) or a\u00a0<\/span><strong><span data-preserver-spaces=\"true\">component template<\/span><\/strong><span data-preserver-spaces=\"true\">. Component templates are, as their name indicates,\u00a0<\/span><em><span data-preserver-spaces=\"true\">building blocks<\/span><\/em><span data-preserver-spaces=\"true\">\u00a0that can be used again and again to create index templates, and they define\u00a0<\/span><em><span data-preserver-spaces=\"true\">mappings<\/span><\/em><span data-preserver-spaces=\"true\">,\u00a0<\/span><em><span data-preserver-spaces=\"true\">settings<\/span><\/em><span data-preserver-spaces=\"true\">, and\u00a0<\/span><em><span data-preserver-spaces=\"true\">aliases<\/span><\/em><span data-preserver-spaces=\"true\">. Component templates make it easier and faster to create index templates.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">The main purpose behind the component templates, making the templates more\u00a0<\/span><em><span data-preserver-spaces=\"true\">modular<\/span><\/em><span data-preserver-spaces=\"true\">\u00a0and more\u00a0<\/span><em><span data-preserver-spaces=\"true\">viable<\/span><\/em><span data-preserver-spaces=\"true\">\u00a0to apply with less effort.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">Index templates may contain many component templates other than directly specified settings, mappings, and aliases. Just because an index template is composed of component templates, it doesn&#8217;t mean they are directly applied to a set of indices.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">In settings, specifications of an index are defined (<\/span><strong><span data-preserver-spaces=\"true\">e.g.<\/span><\/strong><span data-preserver-spaces=\"true\">,\u00a0<\/span><strong><span data-preserver-spaces=\"true\">number of shards<\/span><\/strong><span data-preserver-spaces=\"true\">,\u00a0<\/span><strong><span data-preserver-spaces=\"true\">number of replicas<\/span><\/strong><span data-preserver-spaces=\"true\">,\u00a0<\/span><strong><span data-preserver-spaces=\"true\">shard<\/span><\/strong><span data-preserver-spaces=\"true\">\u00a0<\/span><strong><span data-preserver-spaces=\"true\">size<\/span><\/strong><span data-preserver-spaces=\"true\">, &#8230;)<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">In mappings, how the documents will be stored in the index is defined.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">To remember an index&#8217;s name easily, aliases are used.<\/span><\/p>\n<p cid=\"n17\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><strong>Basic template behavior:<\/strong><\/p>\n<ul>\n<li><span data-preserver-spaces=\"true\">At the index creation, time index templates will not be merged; the one with the highest priority will be used<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Unless there is a composable index template that matches a particular index, a legacy template is available to be matched and applied<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Templates will be applied to a new index if the index&#8217;s name matches the template&#8217;s wildcard pattern<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Changes that have been applied to an index template won&#8217;t cause any change to the indices that have already been created<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Specified explicit settings weigh heavier when the index that&#8217;s being created matches with an index template. Explicit settings will be taken into account<\/span><\/li>\n<\/ul>\n<p><span md-inline=\"plain\" class=\"md-plain\">For example, if &#8220;number_of_replicas&#8221; is set to 2 for the component index template and it is defined to be 0 at the index creation, then it will be 0 replicas.<\/span><\/p>\n<p cid=\"n31\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"code\" spellcheck=\"false\" class=\"md-pair-s\"><code>logs-*-* and metrics-*-*<\/code><\/span><span md-inline=\"plain\" class=\"md-plain\">are the 2 of the index patterns and their built-in index templates got a priority of 100. <\/span><\/p>\n<p cid=\"n32\" mdtype=\"paragraph\" class=\"md-end-block md-p\">If overriding these templates needs to be prevented, then the new index templates need to have a priority of less than 100.<\/p>\n<h2 cid=\"n33\" mdtype=\"heading\" class=\"md-end-block md-heading\"><span md-inline=\"plain\" class=\"md-plain\">2. Creating a Template<\/span><\/h2>\n<p cid=\"n34\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span data-preserver-spaces=\"true\">There are many ways to create index templates.\u00a0<\/span><strong><span data-preserver-spaces=\"true\">Index template<\/span><\/strong><span data-preserver-spaces=\"true\">\u00a0or\u00a0<\/span><strong><span data-preserver-spaces=\"true\">component template<\/span><\/strong><span data-preserver-spaces=\"true\">\u00a0APIs can be used. If the more interfacial way is preferred,\u00a0<\/span><em><span data-preserver-spaces=\"true\">Stack Management\u00a0<\/span><\/em><span data-preserver-spaces=\"true\">in\u00a0<\/span><strong><span data-preserver-spaces=\"true\">Kibana<\/span><\/strong><span data-preserver-spaces=\"true\">\u00a0<\/span><strong><span data-preserver-spaces=\"true\">UI<\/span><\/strong><span data-preserver-spaces=\"true\">\u00a0can also be used for this purpose.<\/span><\/p>\n<h3 cid=\"n34\" mdtype=\"paragraph\">2.1 Create an Index Template<\/h3>\n<p cid=\"n35\" mdtype=\"paragraph\" class=\"md-end-block md-p\">We defined the wildcard pattern as <strong>*cars<\/strong>. In the future, at the creation time, any index matching this pattern (e.g., used_cars) will inherit the configurations of this template.<br \/>\nThe &#8220;manufacture_date&#8221; field is mapped in a type of date, and the format is <strong>dd-MM-yyyy<\/strong>, and it has a priority of 400, so it has precedence over the built-in index templates.<\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n37\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">_index_template<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">cars_template<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"index_patterns\"<\/span>: [<span class=\"cm-string\">\"*cars\"<\/span>],<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"priority\"<\/span>: <span class=\"cm-number\">400<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"template\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"mappings\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"properties\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"make\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"type\"<\/span>: <span class=\"cm-string\">\"text\"<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  }, \u00a0<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"manufacture_date\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"type\"<\/span>: <span class=\"cm-string\">\"date\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"format\"<\/span>:<span class=\"cm-string\">\"dd-MM-yyyy\"<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0  },<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"settings\"<\/span>:{<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"number_of_shards\"<\/span>:<span class=\"cm-number\">1<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"number_of_replicas\"<\/span>:<span class=\"cm-number\">1<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0  },<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"aliases\"<\/span>:{<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"all_cars\"<\/span>:{}<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">  }<\/span>\r\n<span role=\"presentation\">}\r\n\r\n<\/span><\/pre>\n<p><img loading=\"lazy\" src=\"http:\/\/192.168.12.139\/wp-content\/uploads\/2022\/10\/create-template-logistics.webp\" alt=\"\" class=\"alignnone wp-image-353 size-full\" width=\"1047\" height=\"819\" \/><\/p>\n<p cid=\"n44\" mdtype=\"paragraph\"><a href=\"http:\/\/192.168.12.139\/wp-content\/uploads\/2022\/10\/create-template-mappings.webp\"><img loading=\"lazy\" src=\"http:\/\/192.168.12.139\/wp-content\/uploads\/2022\/10\/create-template-mappings.webp\" alt=\"\" class=\"alignnone wp-image-361 size-full\" width=\"1047\" height=\"819\" \/><\/a><\/p>\n<p cid=\"n44\" mdtype=\"paragraph\"><img loading=\"lazy\" src=\"http:\/\/192.168.12.139\/wp-content\/uploads\/2022\/10\/create-template-mappings.webp\" alt=\"\" class=\"alignnone wp-image-377 size-full\" width=\"1047\" height=\"819\" \/><\/p>\n<p cid=\"n44\" mdtype=\"paragraph\"><img loading=\"lazy\" src=\"http:\/\/192.168.12.139\/wp-content\/uploads\/2022\/10\/create-template-mappings2.webp\" alt=\"\" class=\"alignnone wp-image-380 size-full\" width=\"1341\" height=\"900\" \/><\/p>\n<p cid=\"n44\" mdtype=\"paragraph\"><img loading=\"lazy\" src=\"http:\/\/192.168.12.139\/wp-content\/uploads\/2022\/10\/create-template-aliases.webp\" alt=\"\" class=\"alignnone wp-image-379 size-full\" width=\"1047\" height=\"819\" \/><\/p>\n<p cid=\"n49\" mdtype=\"paragraph\" class=\"md-end-block md-p\">It is easy to create a new index matching the index template&#8217;s pattern now, and the index will acquire the mappings, settings, and aliases without effort. <strong>PUT<\/strong> request will create the index if it doesn&#8217;t exist or update it if it exists.<\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n50\" mdtype=\"fences\" lang=\"\"><span role=\"presentation\">PUT used_cars<\/span><\/pre>\n<p cid=\"n51\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">The &#8220;used_cars&#8221; index will match the pattern of the template (*cars) and inherit all of the configurations.<\/span><\/p>\n<p cid=\"n52\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">The indices that will also inherit the configurations of the template:<\/span><\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n53\" mdtype=\"fences\" lang=\"\"><span role=\"presentation\">PUT european_cars<\/span>\r\n<span role=\"presentation\">PUT japan-cars<\/span>\r\n<span role=\"presentation\">PUT brandnewcars<\/span><\/pre>\n<p cid=\"n54\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">The indices will not match with the pattern of the template so they won&#8217;t be able to inherit the configurations:<\/span><\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n55\" mdtype=\"fences\" lang=\"\"><span role=\"presentation\">PUT classic_car<\/span>\r\n<span role=\"presentation\">PUT europeancars2<\/span>\r\n<span role=\"presentation\">PUT new-cars-2022<\/span><\/pre>\n<p cid=\"n56\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">Let&#8217;s create some documents:<\/span><\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n57\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">used_cars<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">_doc<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-number\">1<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"manufacture_date\"<\/span>: <span class=\"cm-string\">\"04-01-2022\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"make\"<\/span>: <span class=\"cm-string\">\"ford\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"model\"<\/span>: <span class=\"cm-string\">\"mustang\"<\/span><\/span>\r\n<span role=\"presentation\">}<\/span>\r\n<span role=\"presentation\"><span cm-text=\"\" cm-zwsp=\"\">\u200b<\/span><\/span>\r\n<span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">used_cars<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">_doc<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-number\">2<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"manufacture_date\"<\/span>: <span class=\"cm-string\">\"26-03-2022\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"make\"<\/span>: <span class=\"cm-string\">\"kia\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"model\"<\/span>: <span class=\"cm-string\">\"niro\"<\/span><\/span>\r\n<span role=\"presentation\">}<\/span>\r\n<span role=\"presentation\"><span cm-text=\"\" cm-zwsp=\"\">\u200b<\/span><\/span>\r\n<span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">japan<\/span><span class=\"cm-operator\">-<\/span><span class=\"cm-variable\">cars<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">_doc<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-number\">1<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"manufacture_date\"<\/span>: <span class=\"cm-string\">\"14-02-2022\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"make\"<\/span>: <span class=\"cm-string\">\"subaru\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"model\"<\/span>: <span class=\"cm-string\">\"forester\"<\/span><\/span>\r\n<span role=\"presentation\">}<\/span>\r\n<span role=\"presentation\"><span cm-text=\"\" cm-zwsp=\"\">\u200b<\/span><\/span><\/pre>\n<p cid=\"n59\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">Now it&#8217;s time to cast some magic.<\/span><\/p>\n<p cid=\"n60\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">Imagine we have lots of indices and we want to search all of them at once. In this manner we want to search the cars manufactured in the first quarter of 2022:<\/span><\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n61\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">GET<\/span> <span class=\"cm-variable\">european_cars<\/span>,<span class=\"cm-variable\">japan<\/span><span class=\"cm-operator\">-<\/span><span class=\"cm-variable\">cars<\/span>,<span class=\"cm-variable\">brandnewcars<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">_search<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"query\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"range\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"manufacture_date\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"gte\"<\/span>: <span class=\"cm-string\">\"01-01-2022\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"lte\"<\/span>: <span class=\"cm-string\">\"31-03-2022\"<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<p cid=\"n62\" mdtype=\"paragraph\" class=\"md-end-block md-p\">This is not so problematic for three indices, but when we think big, there are lots of indices, and when the index number gets bigger, typos may be made easily.<\/p>\n<p cid=\"n63\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">Aliases become handy here:<\/span><\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n64\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">GET<\/span> <span class=\"cm-variable\">all_cars<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">_search<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"query\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"range\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"manufacture_date\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"gte\"<\/span>: <span class=\"cm-string\">\"01-01-2022\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"lte\"<\/span>: <span class=\"cm-string\">\"31-03-2022\"<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n66\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">GET<\/span> <span class=\"cm-variable\">all_cars<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">_search<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"query\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"match\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"make\"<\/span>: <span class=\"cm-string\">\"subaru\"<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<blockquote cid=\"n68\" mdtype=\"blockquote\">\n<p cid=\"n69\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"strong\" class=\"md-pair-s \"><strong><span md-inline=\"plain\" class=\"md-plain\">Always consider priority value when working with high numbers of indices and index templates!<\/span><\/strong><\/span><\/p>\n<\/blockquote>\n<p cid=\"n70\" mdtype=\"paragraph\" class=\"md-end-block md-p\">When there are more than one index templates affecting the same index patterns, the one with the highest priority calls the shot.<\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n71\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">_index_template<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">food_template<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"index_patterns\"<\/span>: [<span class=\"cm-string\">\"*fruits\"<\/span>],<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"priority\"<\/span>: <span class=\"cm-number\">400<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"template\"<\/span>: { . . . }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n72\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">_index_template<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">food_template_1<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"index_patterns\"<\/span>: [<span class=\"cm-string\">\"*fruits\"<\/span>],<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"priority\"<\/span>: <span class=\"cm-number\">500<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"template\"<\/span>: { . . . }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<h3 cid=\"n44\" mdtype=\"paragraph\">2.2 Create a Component Template<\/h3>\n<p cid=\"n75\" mdtype=\"paragraph\" class=\"md-end-block md-p\">As aforementioned, component templates favor users in every way possible. Instead of creating many index templates for various desires or indices each time we need, it is more convenient to create various component templates and combine them to configure them again and again for new indices on different needs.<\/p>\n<p cid=\"n76\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">Re-usability is the keyword here.<\/span><\/p>\n<p cid=\"n77\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">component template API is used to create new component templates.<\/span><\/p>\n<p cid=\"n78\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">Let&#8217;s create component templates for settings, mappings, and aliases.<\/span><\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n79\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">_component_template<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">my_settings_template<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"template\"<\/span>:{<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"settings\"<\/span>:{<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"number_of_replicas\"<\/span>:<span class=\"cm-number\">2<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"number_of_shards\"<\/span>:<span class=\"cm-number\">1<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n80\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">_component_template<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">my_mappings_template<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"template\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"mappings\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"properties\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"manufacture_date\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"type\"<\/span>: <span class=\"cm-string\">\"date\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"format\"<\/span>:<span class=\"cm-string\">\"dd-MM-yyyy\"<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0  }<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n81\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">_component_template<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">my_aliases_template<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"template\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"aliases\"<\/span>: {<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"all_cars\"<\/span>: {},<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"manufactured_cars\"<\/span>:{}<\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">  }<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<p cid=\"n82\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"strong\" class=\"md-pair-s \"><strong><span md-inline=\"plain\" class=\"md-plain\">index pattern is not needed in component templates.<\/span><\/strong><\/span><span md-inline=\"plain\" class=\"md-plain\"> <\/span><\/p>\n<p cid=\"n83\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">Now we have the building blocks to create a composable index template.<\/span><\/p>\n<p cid=\"n84\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">composed_of parameter will do the magic here:<\/span><\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n85\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">_index_template<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">composed_cars_template<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"index_patterns\"<\/span>: [<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string\">\"*cars\"<\/span><\/span>\r\n<span role=\"presentation\">  ],<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"priority\"<\/span>: <span class=\"cm-number\">500<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"composed_of\"<\/span>: [<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string\">\"my_settings_template\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string\">\"my_mappings_template\"<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string\">\"my_aliases_template\"<\/span><\/span>\r\n<span role=\"presentation\">  ]<\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n<p cid=\"n87\" mdtype=\"paragraph\" class=\"md-end-block md-p\"><span md-inline=\"plain\" class=\"md-plain\">Component templates can be versioned optionally by &#8220;<\/span><span md-inline=\"strong\" class=\"md-pair-s \"><strong><span md-inline=\"plain\" class=\"md-plain\">version<\/span><\/strong><\/span><span md-inline=\"plain\" class=\"md-plain\">&#8221; parameter. <\/span><\/p>\n<pre class=\"md-fences md-end-block ty-contain-cm modeLoaded\" spellcheck=\"false\" cid=\"n88\" mdtype=\"fences\" lang=\"json\"><span role=\"presentation\"><span class=\"cm-variable\">PUT<\/span> <span class=\"cm-variable\">_component_template<\/span><span class=\"cm-operator\">\/<\/span><span class=\"cm-variable\">my_settings_template<\/span><\/span>\r\n<span role=\"presentation\">{<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"template\"<\/span>:{<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0<span class=\"cm-string cm-property\">\"settings\"<\/span>:{<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"number_of_replicas\"<\/span>:<span class=\"cm-number\">2<\/span>,<\/span>\r\n<span role=\"presentation\"> \u00a0 \u00a0 \u00a0<span class=\"cm-string cm-property\">\"number_of_shards\"<\/span>:<span class=\"cm-number\">2<\/span><\/span>\r\n<span role=\"presentation\"> \u00a0  }<\/span>\r\n<span role=\"presentation\">  },<\/span>\r\n<span role=\"presentation\"> \u00a0<span class=\"cm-string cm-property\">\"version\"<\/span>: <span class=\"cm-number\">3<\/span><\/span>\r\n<span role=\"presentation\">}<\/span><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1. Overview Index templates are the configurations of indices to be created. However, the configuration of an index can be altered after it is created individually. Whether an index is created manually or automatically while indexing a document, the new index will be created in the light of the template [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":678,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[19,18,17,20,16],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Index Templates - Absonet<\/title>\n<meta name=\"description\" content=\"Elasticsearch Indices have mappings, settings, and aliases. 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