{"id":43757,"date":"2023-07-24T19:06:36","date_gmt":"2023-05-03T00:28:05","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/kubernetes-crashloopbackoff-%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e4%bb%a5%e5%8f%8a%e5%a6%82%e4%bd%95%e4%bf%ae%e5%a4%8d%ef%bc%9f\/"},"modified":"2024-04-30T15:09:44","modified_gmt":"2024-04-30T07:09:44","slug":"kubernetes-crashloopbackoff-%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e4%bb%a5%e5%8f%8a%e5%a6%82%e4%bd%95%e4%bf%ae%e5%a4%8d%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/kubernetes-crashloopbackoff-%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e4%bb%a5%e5%8f%8a%e5%a6%82%e4%bd%95%e4%bf%ae%e5%a4%8d%ef%bc%9f\/","title":{"rendered":"Kubernetes CrashLoopBackOff \u662f\u4ec0\u4e48\uff1f\u4ee5\u53ca\u5982\u4f55\u4fee\u590d\uff1f"},"content":{"rendered":"<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d548b37434c4406cd341c\/0-1.png\" alt=\"Kubernetes Crashloopbackoff, an illustrated representation. A Pod is in a loop. It tries to run, but it fails, so it goes to a Failed state. If waits a bit to help you debug, then it tries to run again. If the issue is not fixed, we are in a loop. It fails again.\" \/><\/div>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>CrashLoopBackOff\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u68c0\u6d4bCrashLoopBackOff\u95ee\u9898\u7684\u65b9\u6cd5<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5bfc\u81f4CrashLoopBackOff\u7684\u5e38\u89c1\u539f\u56e0<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7528\u4e8e\u8c03\u8bd5CrashLoopBackOff\u7684Kubernetes\u5de5\u5177<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u4f7f\u7528Prometheus\u68c0\u6d4bCrashLoopBackOff\u7684\u65b9\u6cd5<\/ol>\n<p>&nbsp;<\/p>\n<h2>\u8981\u68c0\u6d4b\u96c6\u7fa4\u4e2d\u7684CrashLoopBackOff\u600e\u4e48\u505a\uff1f<\/h2>\n<p><code>\u83b7\u53d6 Kubernetes pods \u7684\u4fe1\u606f<\/code><\/p>\n<pre class=\"post-pre\"><code>$ kubectl get pods\r\nNAME                     READY     STATUS             RESTARTS   AGE\r\nflask-7996469c47-d7zl2   1\/1       Running            1          77d\r\nflask-7996469c47-tdr2n   1\/1       Running            0          77d\r\nnginx-5796d5bc7c-2jdr5   0\/1       CrashLoopBackOff   2          1m\r\nnginx-5796d5bc7c-xsl6p   0\/1       CrashLoopBackOff   2          1m<\/code><\/pre>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u00a0READY \u72b6\u614b\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u00a0(0\/1)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u305d\u308c\u3089\u306estatus\u306f\u00a0CrashLoopBackOff\u3092\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u00a0RESTARTS\u00a0\u5217\u306b\u306f\u30011\u3064\u4ee5\u4e0a\u306e\u518d\u8d77\u52d5\u306e\u8868\u793a\u304c\u3042\u308a\u307e\u3059\u3002<\/ul>\n<p><code>\u5d29\u6e83\u5faa\u73af\u4e2d\u65ad<\/code><\/p>\n<p><code>\u8dd1\u6b65<\/code><code>\u5931\u8d25\u4e86  le)<\/code><\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d548b37434c4406cd341c\/19-0.png\" alt=\"A timeline of a CrashloopBackoff. Everytime it fails, the BackoffTime and the Restart Count are increased\" \/><\/div>\n<p><em>CrashloopBackoff\u7684\u65f6\u95f4\u7ebf\u3002\u6bcf\u6b21\u5931\u8d25\uff0cBackoffTime\u548cRestart Count\u90fd\u4f1a\u589e\u52a0\u3002<\/em><\/p>\n<h2>\u4e00\u822c\u800c\u8a00\uff0c\u51fa\u73b0CrashLoopBackOff\u9519\u8bef\u7684\u5e38\u89c1\u539f\u56e0\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p><code>\u72b6\u51b5<\/code><\/p>\n<p>\u8a2d\u5b9a\u30df\u30b9\uff1a\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u30bf\u30a4\u30d7\u30df\u30b9\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u30ea\u30bd\u30fc\u30b9\u304c\u5229\u7528\u3067\u304d\u306a\u3044\uff1a\u30de\u30a6\u30f3\u30c8\u3055\u308c\u3066\u3044\u306a\u3044PersistedVolume\u306e\u3088\u3046\u306a\u3082\u306e\u3002<\/p>\n<p>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u5f15\u6570\u304c\u9593\u9055\u3063\u3066\u3044\u308b\uff1a\u898b\u3064\u304b\u3089\u306a\u3044\u304b\u3001\u6b63\u3057\u304f\u306a\u3044\u3082\u306e\u3002<\/p>\n<p>\u30d0\u30b0\u3068\u4f8b\u5916\uff1a\u3053\u308c\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u7279\u6709\u306e\u3082\u306e\u3067\u3001\u4f55\u3067\u3082\u3042\u308a\u3067\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u65e2\u5b58\u306e\u30dd\u30fc\u30c8\u3092\u30d0\u30a4\u30f3\u30c9\u3057\u3088\u3046\u3068\u3057\u305f\u3002<br \/>\n\u30e1\u30e2\u30ea\u5236\u9650\u304c\u4f4e\u3059\u304e\u308b\u305f\u3081\u3001\u30b3\u30f3\u30c6\u30ca\u306f Out Of Memory \u3067\u5f37\u5236\u7d42\u4e86\u3057\u305f\u3002<\/p>\n<p>liveness probes\u306e\u30a8\u30e9\u30fc\u306f\u3001Pod\u304c\u6e96\u5099\u5b8c\u4e86\u3067\u3042\u308b\u3053\u3068\u3092\u30ec\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u3002<\/p>\n<p>\u8aad\u307f\u53d6\u308a\u5c02\u7528\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3001\u307e\u305f\u306f\u4e00\u822c\u7684\u306a\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u304c\u4e0d\u8db3\u3057\u3066\u3044\u308b\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>CrashLoopBackOff\u72b6\u6001\u7684\u8c03\u8bd5\u3001\u6545\u969c\u6392\u9664\u548c\u4fee\u590d\u65b9\u6cd5<\/h2>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u68c0\u67e5Pod\u63cf\u8ff0\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>\u68c0\u67e5Pod\u65e5\u5fd7\u3002<\/p>\n<p>\u68c0\u67e5\u4e8b\u4ef6\u3002<\/p>\n<p>\u68c0\u67e5\u90e8\u7f72\u60c5\u51b5\u3002<\/p>\n<h4>\u67e5\u770bPod\u63cf\u8ff0 &#8211; kubectl describe pod<\/h4>\n<p><code>\u67e5\u770bkubectl\u63cf\u8ff0\u7684pod<\/code><\/p>\n<pre class=\"post-pre\"><code>$ kubectl describe pod the-pod-name\r\nName:         the-pod-name\r\nNamespace:    default\r\nPriority:     0\r\n\u2026\r\nState:          Waiting\r\nReason:       CrashLoopBackOff\r\nLast State:     Terminated\r\nReason:       Error\r\n\u2026\r\nWarning  BackOff                1m (x5 over 1m)   kubelet, ip-10-0-9-132.us-east-2.compute.internal  Back-off restarting failed container\r\n\u2026<\/code><\/pre>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u73fe\u5728\u306ePod\u306e\u00a0State\u00a0\u306f\u00a0Waiting\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Waiting\u72b6\u614b\u306e\u7406\u7531\u306f &#8220;CrashLoopBackOff &#8220;\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6700\u5f8c\u306e\uff08\u307e\u305f\u306f\u524d\u306e\uff09\u72b6\u614b\u306f &#8220;Terminated &#8220;\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u6700\u5f8c\u306e\u7d42\u4e86\u306e\u7406\u7531\u306f &#8220;Error&#8221;\u3002<\/ul>\n<p><code>kubectl\u63cf\u8ff0pod<\/code><\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Pod\u306e\u5b9a\u7fa9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b3\u30f3\u30c6\u30ca<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b3\u30f3\u30c6\u30ca\u7528\u306b\u5f15\u304d\u51fa\u3055\u308c\u305f\u30a4\u30e1\u30fc\u30b8<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b3\u30f3\u30c6\u30ca\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30ea\u30bd\u30fc\u30b9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5f15\u6570\u306e\u8aa4\u308a\u3084\u6b20\u843d<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">&#8230;<\/ul>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code>\u2026\r\nWarning  BackOff                1m (x5 over 1m)   kubelet, ip-10-0-9-132.us-east-2.compute.internal  Back-off restarting failed container\r\n\u2026<\/code><\/pre>\n<p><code>\u91cd\u65b0\u542f\u52a8\u5931\u8d25\u7684\u5bb9\u5668\u65f6\u8bf7\u7a0d\u540e\u518d\u8bd5<\/code><\/p>\n<h4>\u67e5\u770b\u65e5\u5fd7 &#8211; kubectl logs<\/h4>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code>kubectl logs mypod<\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code>kubectl logs mypod -c mycontainer<\/code><\/pre>\n<p>&nbsp;<\/p>\n<h4>\u67e5\u770b\u4e8b\u4ef6- kubectl\u83b7\u53d6\u4e8b\u4ef6\u4fe1\u606f<\/h4>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code>kubectl get events<\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code>kubectl get events --field-selector involvedObject.name=mypod<\/code><\/pre>\n<p><code>\u63cf\u8ff0Pod<\/code><\/p>\n<p>\u63cf\u8ff0Pod<br \/>\nPod\u7684\u63cf\u8ff0<\/p>\n<h4>\u786e\u8ba4\u90e8\u7f72 &#8211; kubectl\u63cf\u8ff0\u90e8\u7f72<\/h4>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code>kubectl describe deployment mydeployment<\/code><\/pre>\n<p>&nbsp;<\/p>\n<h4>\u628a\u4e00\u5207\u6574\u5408\u8d77\u6765<\/h4>\n<p>&nbsp;<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d548b37434c4406cd341c\/97-0.png\" alt=\"Debugging a Crashloopbackoff. It shows three terminals with the relationship between several debug commands.\" \/><\/div>\n<p><em>\u8c03\u8bd5CrashloopBackoff\u3002\u8fd9\u8868\u793a\u6709\u4e09\u4e2a\u7ec8\u7aef\u4e0e\u4e00\u4e9b\u8c03\u8bd5\u547d\u4ee4\u76f8\u5173\u3002<\/em><\/p>\n<h2>\u5728Prometheus\u4e2d\u68c0\u6d4bCrashLoopBackOff\u7684\u65b9\u6cd5<\/h2>\n<p><a>\u7528\u65bc\u96f2\u7aef\u76e3\u63a7\u7684Prometheus\u3002<\/a><\/p>\n<p><code>\u72b6\u6001<\/code><a>Kube\u72b6\u6001\u6307\u6807<\/a><\/p>\n<pre class=\"post-pre\"><code>kube_pod_container_status_waiting_reason{reason=\"CrashLoopBackOff\"} == 1<\/code><\/pre>\n<p>&nbsp;<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d548b37434c4406cd341c\/111-0.png\" alt=\"PromQL example of CrashLoopBackOff detection based on pod status waiting.\" \/><\/div>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code>rate(kube_pod_container_status_restarts_total[5m]) &gt; 0<\/code><\/pre>\n<p>&nbsp;<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d548b37434c4406cd341c\/117-0.png\" alt=\"PromQL example of CrashLoopBackOff detection based on restart rate\" \/><\/div>\n<p><strong>\u8bf7\u6ce8\u610f\uff1a<\/strong><\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d548b37434c4406cd341c\/123-0.png\" alt=\"Correlation between restarts and crashloopbackoff. Not all restarts are caused by a crashloopbackoff.\" \/><\/div>\n<p><em>\u5e94\u8be5\u5728\u6bcf\u6b21CrashLoopBackOff\u5468\u671f\u7ed3\u675f\u65f6\u91cd\u65b0\u542f\u52a8\uff081\uff09\uff0c\u4f46\u4e5f\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e0eCrashLoopBackOff\u65e0\u5173\u7684\u91cd\u65b0\u542f\u52a8\uff082\uff09\u3002<\/em><\/p>\n<pre class=\"post-pre\"><code>- alert: CrashLoopBackOffAlert\r\nexpr: rate(kube_pod_container_status_restarts_total[5m]) &gt; 0\r\nfor: 10m\r\nlabels:\r\nseverity: warning\r\nannotations:\r\nsummary: Pod is in CrashLoopBackOff state\r\ndescription: Pod {{ $labels.pod }} in {{ $labels.namespace }} has a container {{ $labels.container }} which is causing a CrashLoopBackOff<\/code><\/pre>\n<p>&nbsp;<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p><code>kubectl\u7684\u7ffb\u8bd1<\/code><\/p>\n<hr \/>\n<h3>\u4f7f\u7528Sysdig Monitor\u52a0\u5febCrashLoopBackOff\u7684\u8c03\u8bd5\u901f\u5ea6\u3002<\/h3>\n<p>&nbsp;<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d548b37434c4406cd341c\/148-0.gif\" alt=\"How to debug a crashloopbackoff with Sysdig Monitor Advisor\" \/><\/div>\n<p><em>\u4f7f\u7528Sysdig Monitor Advisor\u8c03\u8bd5\u5d29\u6e83\u5faa\u73af\u56de\u9000\u7684\u65b9\u6cd5<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>CrashLoopBackOff\u662f\u4ec0\u4e48\uff1f &nbsp; \u68c0\u6d4bCrashLoopBackOff\u95ee\u9898\u7684\u65b9\u6cd5 &#038;nb [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-43757","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>Kubernetes CrashLoopBackOff \u662f\u4ec0\u4e48\uff1f\u4ee5\u53ca\u5982\u4f55\u4fee\u590d\uff1f - 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\/zh\/blog\/kubernetes-crashloopbackoff-\u662f\u4ec0\u4e48\uff1f\u4ee5\u53ca\u5982\u4f55\u4fee\u590d\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kubernetes CrashLoopBackOff \u662f\u4ec0\u4e48\uff1f\u4ee5\u53ca\u5982\u4f55\u4fee\u590d\uff1f\" \/>\n<meta property=\"og:description\" content=\"CrashLoopBackOff\u662f\u4ec0\u4e48\uff1f &nbsp; 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