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Change 502 error page to automatically refresh if backend status changes

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This commit is contained in:
Alexy Mikhailichenko
2019-07-01 14:14:34 -04:00
parent b904895a61
commit b35235f1e9
2 changed files with 71 additions and 1 deletions
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64
plugins/nginx-vhosts/templates/502-error.html Normal file
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@@ -0,0 +1,64 @@
<!DOCTYPE html>
<html>
<head>
<title>We're sorry, but something went wrong (500)</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<style>
body {
background-color: #6CABF7;
color: #fff;
text-align: center;
font-family: arial, sans-serif;
margin: 0;
}
div {
position:absolute;
top: 50%;
left: 50%;
transform: translateX(-50%) translateY(-50%);
}
p {
color: #eee;
}
</style>
<script>
/* Attempt to automatically reload, assuming there's a temporary gateway issue */
var retry_current = 2; // First refresh at 2 seconds
var retry_limit = 4096; // Maximum backoff time, ~68 minutes
check_gateway = function () {
var request = new XMLHttpRequest();
request.open('HEAD', window.location.href, true);
request.onload = function () {
console.dir(window.location.href, 'returned', request.status);
if (request.status >= 200 && request.status < 400) {
window.location.reload(true);
} else {
if (retry_current < retry_limit) {
retry_current *= 2;
}
console.dir('Trying', window.location.href, 'in', retry_current, 'seconds...');
setTimeout(check_gateway, retry_current * 1000);
}
};
request.send();
};
setTimeout(check_gateway, retry_current * 1000);
</script>
</head>
<body>
<div>
<h1>We're sorry, but something went wrong.</h1>
<p>If you are the application owner check the logs for more information.</p>
</div>
</body>
</html>

8
plugins/nginx-vhosts/templates/nginx.conf.sigil
View File

@@ -105,11 +105,17 @@ server {
internal;
}
error_page 500 501 502 503 504 505 506 507 508 509 510 511 /500-error.html;
error_page 500 501 503 504 505 506 507 508 509 510 511 /500-error.html;
location /500-error.html {
root {{ $.DOKKU_LIB_ROOT }}/data/nginx-vhosts/dokku-errors;
internal;
}
error_page 502 /502-error.html;
location /502-error.html {
root {{ $.DOKKU_LIB_ROOT }}/data/nginx-vhosts/dokku-errors;
internal;
}
}
{{ end }}{{ end }}