{"id":19842,"date":"2024-03-15T19:31:33","date_gmt":"2024-03-15T19:31:33","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/"},"modified":"2024-03-21T16:39:57","modified_gmt":"2024-03-21T16:39:57","slug":"how-do-we-dynamically-add-environment-variables-in-k8s","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/","title":{"rendered":"How do we dynamically add environment variables in k8s?"},"content":{"rendered":"<p>In Kubernetes, ConfigMap or Secret can be used to dynamically add environment variables. Here is an example of using ConfigMap and Secret.<\/p>\n<ol>\n<li>Utilize ConfigMap:<\/li>\n<\/ol>\n<p>First, create a ConfigMap definition file that includes environment variables (e.g. configmap.yaml).<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-attr\">apiVersion:<\/span> <span class=\"hljs-string\">v1<\/span>\r\n<span class=\"hljs-attr\">kind:<\/span> <span class=\"hljs-string\">ConfigMap<\/span>\r\n<span class=\"hljs-attr\">metadata:<\/span>\r\n  <span class=\"hljs-attr\">name:<\/span> <span class=\"hljs-string\">my-configmap<\/span>\r\n<span class=\"hljs-attr\">data:<\/span>\r\n  <span class=\"hljs-attr\">MY_ENV_VARIABLE:<\/span> <span class=\"hljs-string\">my_value<\/span>\r\n<\/code><\/pre>\n<p>Next, reference this ConfigMap in the Pod&#8217;s spec and add the environment variables to the container.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-attr\">apiVersion:<\/span> <span class=\"hljs-string\">v1<\/span>\r\n<span class=\"hljs-attr\">kind:<\/span> <span class=\"hljs-string\">Pod<\/span>\r\n<span class=\"hljs-attr\">metadata:<\/span>\r\n  <span class=\"hljs-attr\">name:<\/span> <span class=\"hljs-string\">my-pod<\/span>\r\n<span class=\"hljs-attr\">spec:<\/span>\r\n  <span class=\"hljs-attr\">containers:<\/span>\r\n    <span class=\"hljs-bullet\">-<\/span> <span class=\"hljs-attr\">name:<\/span> <span class=\"hljs-string\">my-container<\/span>\r\n      <span class=\"hljs-attr\">image:<\/span> <span class=\"hljs-string\">my_image<\/span>\r\n      <span class=\"hljs-attr\">envFrom:<\/span>\r\n        <span class=\"hljs-bullet\">-<\/span> <span class=\"hljs-attr\">configMapRef:<\/span>\r\n            <span class=\"hljs-attr\">name:<\/span> <span class=\"hljs-string\">my-configmap<\/span>\r\n<\/code><\/pre>\n<p>In this way, the my-container container in the Pod will dynamically add an environment variable named MY_ENV_VARIABLE with a value of my_value.<\/p>\n<ol>\n<li>Use Secret:<\/li>\n<\/ol>\n<p>Firstly, create a Secret definition file containing environment variables (e.g. secret.yaml).<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-attr\">apiVersion:<\/span> <span class=\"hljs-string\">v1<\/span>\r\n<span class=\"hljs-attr\">kind:<\/span> <span class=\"hljs-string\">Secret<\/span>\r\n<span class=\"hljs-attr\">metadata:<\/span>\r\n  <span class=\"hljs-attr\">name:<\/span> <span class=\"hljs-string\">my-secret<\/span>\r\n<span class=\"hljs-attr\">stringData:<\/span>\r\n  <span class=\"hljs-attr\">MY_ENV_VARIABLE:<\/span> <span class=\"hljs-string\">my_value<\/span>\r\n<\/code><\/pre>\n<p>Then, reference this Secret in the spec of the Pod and add the environment variables to the container.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-attr\">apiVersion:<\/span> <span class=\"hljs-string\">v1<\/span>\r\n<span class=\"hljs-attr\">kind:<\/span> <span class=\"hljs-string\">Pod<\/span>\r\n<span class=\"hljs-attr\">metadata:<\/span>\r\n  <span class=\"hljs-attr\">name:<\/span> <span class=\"hljs-string\">my-pod<\/span>\r\n<span class=\"hljs-attr\">spec:<\/span>\r\n  <span class=\"hljs-attr\">containers:<\/span>\r\n    <span class=\"hljs-bullet\">-<\/span> <span class=\"hljs-attr\">name:<\/span> <span class=\"hljs-string\">my-container<\/span>\r\n      <span class=\"hljs-attr\">image:<\/span> <span class=\"hljs-string\">my_image<\/span>\r\n      <span class=\"hljs-attr\">envFrom:<\/span>\r\n        <span class=\"hljs-bullet\">-<\/span> <span class=\"hljs-attr\">secretRef:<\/span>\r\n            <span class=\"hljs-attr\">name:<\/span> <span class=\"hljs-string\">my-secret<\/span>\r\n<\/code><\/pre>\n<p>In this way, the container &#8220;my-container&#8221; in the Pod will dynamically add an environment variable named MY_ENV_VARIABLE with a value of my_value.<\/p>\n<p>Note that the environment variable names and values in ConfigMap and Secret must be of string type.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Kubernetes, ConfigMap or Secret can be used to dynamically add environment variables. Here is an example of using ConfigMap and Secret. Utilize ConfigMap: First, create a ConfigMap definition file that includes environment variables (e.g. configmap.yaml). apiVersion: v1 kind: ConfigMap metadata: name: my-configmap data: MY_ENV_VARIABLE: my_value Next, reference this ConfigMap in the Pod&#8217;s spec and [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-19842","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How do we dynamically add environment variables in k8s? - Blog - Silicon Cloud<\/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:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How do we dynamically add environment variables in k8s?\" \/>\n<meta property=\"og:description\" content=\"In Kubernetes, ConfigMap or Secret can be used to dynamically add environment variables. Here is an example of using ConfigMap and Secret. Utilize ConfigMap: First, create a ConfigMap definition file that includes environment variables (e.g. configmap.yaml). apiVersion: v1 kind: ConfigMap metadata: name: my-configmap data: MY_ENV_VARIABLE: my_value Next, reference this ConfigMap in the Pod&#8217;s spec and [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T19:31:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-21T16:39:57+00:00\" \/>\n<meta name=\"author\" content=\"Ava Mitchell\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ava Mitchell\" \/>\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:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/\"},\"author\":{\"name\":\"Ava Mitchell\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/a3e2658c2cb9fb2be95ae0a8861f4a64\"},\"headline\":\"How do we dynamically add environment variables in k8s?\",\"datePublished\":\"2024-03-15T19:31:33+00:00\",\"dateModified\":\"2024-03-21T16:39:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/\"},\"wordCount\":165,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-do-we-dynamically-add-environment-variables-in-k8s\/\",\"name\":\"How do we dynamically add environment variables in k8s? 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