{"id":6615,"date":"2021-07-07T17:09:43","date_gmt":"2021-07-07T11:39:43","guid":{"rendered":"https:\/\/www.skynats.com\/?p=6615"},"modified":"2021-09-21T16:46:33","modified_gmt":"2021-09-21T11:16:33","slug":"how-to-fix-the-docker-error-x509","status":"publish","type":"post","link":"https:\/\/www.skynats.com\/blog\/how-to-fix-the-docker-error-x509\/","title":{"rendered":"How To Fix The Docker Error x509?"},"content":{"rendered":"\n<p>This is a common docker error when trying to log into their docker registry and the error looks like &#8220;x509: certificate signed by unknown authority&#8221;.<\/p>\n\n\n\n<p>Our Technical team are available to fix all the issues related to Docker and Docker Management.<\/p>\n\n\n\n<p><strong>Cause of this Issue :<\/strong><\/p>\n\n\n\n<p>This error happens when you are using a self-signed certificate for your docker registry instead of the certificate issued by the trusted certificate authority (CA). Then the docker daemon will not trust your self-signed certificate and it will lead to the x509 error.<\/p>\n\n\n\n<p><strong>Diagnose the Issue :<\/strong><\/p>\n\n\n\n<p>You can recreate the issue by trying to log into the docker using the below command ;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker login &lt;docker_registry_host&gt;:&lt;docker_registry_port&gt; -u user -p password \n\nEg :\n\ndocker login skynats.com:5666 -u admin -p pass@123<\/code><\/pre>\n\n\n\n<p>In case of this certificate issue you will get the below error ;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Error response from daemon : Get https:\/\/skynats.com:5666\/v2\/: x509 certificate signed by unknown authority<\/code><\/pre>\n\n\n\n<p><strong>To Resolve the Issue :<\/strong><\/p>\n\n\n\n<p>We can make the docker trust the self-signed certificate by copying the self-signed certificate to the &#8220;\/etc\/docker\/certs.d\/&lt;docker_registry_hostname&gt;:&lt;docker_registry_host_port&gt;\/ca.crt&#8221; on the machine where you are trying to run the docker login command.<\/p>\n\n\n\n<p>You can follow the below steps to solve this issue ;<\/p>\n\n\n\n<p>1. Create the following directory on the server from which you are trying to run the docker login command. <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mkdir -p \/etc\/docker\/certs.d\/&lt;dcoker_registry_host&gt;:&lt;docker_registry_host_port&gt;<\/code><\/pre>\n\n\n\n<p>2. Copy your Docker registry certificate file from your docker registry host to the cluster where you are running docker login.<\/p>\n\n\n\n<p>You should rename your registry certificate file to &#8220;\/etc\/docker\/certs.d\/&lt;docker_registry_host&gt;:&lt;docker_registry_host_port&gt;\/ca.crt&#8221;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>scp &lt;your_registry_hostname&gt;:\/opt\/registry\/certs\/domain.crt \/etc\/docker\/certs.d\/&lt;docker_registry_host&gt;:&lt;docker_registry_host_port&gt;\/ca.crt<\/code><\/pre>\n\n\n\n<p>For example ;<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mkdir -p \/etc\/docker\/certs.d\/skynats.com:5666\n\nscp skynats.com:\/opt\/registry\/certs\/domain.crt \/etc\/docker\/certs.d\/skynats.com:5666\/ca.crt<\/code><\/pre>\n\n\n\n<p>3. Then you can try to login into your docker registry again.<\/p>\n\n\n\n<p>If you need any further assistance related to Docker our <a href=\"https:\/\/www.skynats.com\/contact-us\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span style=\"color:#04789f\" class=\"has-inline-color\">technical team <\/span><\/a>will help you at any time. Contact Us right now<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is a common docker error when trying to log into their docker registry and the error looks like &#8220;x509: certificate signed by unknown authority&#8221;. Our Technical team are available to fix all the issues related to Docker and Docker Management. Cause of this Issue : This error happens when you are using a self-signed [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,127],"tags":[84,427,88],"class_list":["post-6615","post","type-post","status-publish","format-standard","hentry","category-blog","category-docker","tag-apache-docker-images","tag-docker-issues","tag-docker-support"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How To Fix The Docker Error x509? | Docker Support | Skynats<\/title>\n<meta name=\"description\" content=\"This is a common docker error when trying to log into their docker registry and the error looks like &quot;x509: certificate signed by unknown authority&quot;.\" \/>\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.skynats.com\/blog\/how-to-fix-the-docker-error-x509\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How To Fix The Docker Error x509?\" \/>\n<meta property=\"og:description\" content=\"This is a common docker error when trying to log into their docker registry and the error looks like &quot;x509: certificate signed by unknown authority&quot;.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.skynats.com\/blog\/how-to-fix-the-docker-error-x509\/\" \/>\n<meta property=\"og:site_name\" content=\"Server Management Services | Cloud Management | Skynats\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/skynats\" \/>\n<meta property=\"article:published_time\" content=\"2021-07-07T11:39:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-09-21T11:16:33+00:00\" \/>\n<meta name=\"author\" content=\"Tony\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@skynatstech\" \/>\n<meta name=\"twitter:site\" content=\"@skynatstech\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Tony\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.skynats.com\\\/blog\\\/how-to-fix-the-docker-error-x509\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.skynats.com\\\/blog\\\/how-to-fix-the-docker-error-x509\\\/\"},\"author\":{\"name\":\"Tony\",\"@id\":\"https:\\\/\\\/www.skynats.com\\\/blog\\\/#\\\/schema\\\/person\\\/1398d4641035daa52ed8b827e0aafdeb\"},\"headline\":\"How To Fix The Docker Error x509?\",\"datePublished\":\"2021-07-07T11:39:43+00:00\",\"dateModified\":\"2021-09-21T11:16:33+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.skynats.com\\\/blog\\\/how-to-fix-the-docker-error-x509\\\/\"},\"wordCount\":284,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.skynats.com\\\/blog\\\/#organization\"},\"keywords\":[\"apache docker images\",\"docker issues\",\"docker support\"],\"articleSection\":[\"Blog\",\"docker\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.skynats.com\\\/blog\\\/how-to-fix-the-docker-error-x509\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.skynats.com\\\/blog\\\/how-to-fix-the-docker-error-x509\\\/\",\"url\":\"https:\\\/\\\/www.skynats.com\\\/blog\\\/how-to-fix-the-docker-error-x509\\\/\",\"name\":\"How To Fix The Docker Error x509? 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