*:first-child {
margin-top: 0 !important;
}

.markdown-body>*:last-child {
margin-bottom: 0 !important;
}

.markdown-body a:not([href]) {
color: inherit;
text-decoration: none;
}

.markdown-body .anchor {
float: left;
padding-right: 4px;
margin-left: -20px;
line-height: 1;
}

.markdown-body .anchor:focus {
outline: none;
}

.markdown-body p,
.markdown-body blockquote,
.markdown-body ul,
.markdown-body ol,
.markdown-body dl,
.markdown-body table,
.markdown-body pre {
margin-top: 0;
margin-bottom: 16px;
}

.markdown-body hr {
height: 0.25em;
padding: 0;
margin: 24px 0;
background-color: #e1e4e8;
border: 0;
}

.markdown-body blockquote {
padding: 0 1em;
color: #6a737d;
border-left: 0.25em solid #dfe2e5;
}

.markdown-body blockquote>:first-child {
margin-top: 0;
}

.markdown-body blockquote>:last-child {
margin-bottom: 0;
}

.markdown-body kbd {
display: inline-block;
padding: 3px 5px;
font-size: 11px;
line-height: 10px;
color: #444d56;
vertical-align: middle;
background-color: #fafbfc;
border: solid 1px #c6cbd1;
border-bottom-color: #959da5;
border-radius: 3px;
box-shadow: inset 0 -1px 0 #959da5;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
margin-top: 24px;
margin-bottom: 16px;
font-weight: 600;
line-height: 1.25;
}

.markdown-body h1 .octicon-link,
.markdown-body h2 .octicon-link,
.markdown-body h3 .octicon-link,
.markdown-body h4 .octicon-link,
.markdown-body h5 .octicon-link,
.markdown-body h6 .octicon-link {
color: #1b1f23;
vertical-align: middle;
visibility: hidden;
}

.markdown-body h1:hover .anchor,
.markdown-body h2:hover .anchor,
.markdown-body h3:hover .anchor,
.markdown-body h4:hover .anchor,
.markdown-body h5:hover .anchor,
.markdown-body h6:hover .anchor {
text-decoration: none;
}

.markdown-body h1:hover .anchor .octicon-link,
.markdown-body h2:hover .anchor .octicon-link,
.markdown-body h3:hover .anchor .octicon-link,
.markdown-body h4:hover .anchor .octicon-link,
.markdown-body h5:hover .anchor .octicon-link,
.markdown-body h6:hover .anchor .octicon-link {
visibility: visible;
}

.markdown-body h1 {
padding-bottom: 0.3em;
font-size: 2em;
border-bottom: 1px solid #eaecef;
}

.markdown-body h2 {
padding-bottom: 0.3em;
font-size: 1.5em;
border-bottom: 1px solid #eaecef;
}

.markdown-body h3 {
font-size: 1.25em;
}

.markdown-body h4 {
font-size: 1em;
}

.markdown-body h5 {
font-size: 0.875em;
}

.markdown-body h6 {
font-size: 0.85em;
color: #6a737d;
}

.markdown-body ul,
.markdown-body ol {
padding-left: 2em;
}

.markdown-body ul ul,
.markdown-body ul ol,
.markdown-body ol ol,
.markdown-body ol ul {
margin-top: 0;
margin-bottom: 0;
}

.markdown-body li {
word-wrap: break-all;
}

.markdown-body li>p {
margin-top: 16px;
}

.markdown-body li+li {
margin-top: 0.25em;
}

.markdown-body dl {
padding: 0;
}

.markdown-body dl dt {
padding: 0;
margin-top: 16px;
font-size: 1em;
font-style: italic;
font-weight: 600;
}

.markdown-body dl dd {
padding: 0 16px;
margin-bottom: 16px;
}

.markdown-body table {
display: block;
width: 100%;
overflow: auto;
}

.markdown-body table th {
font-weight: 600;
}

.markdown-body table th,
.markdown-body table td {
padding: 6px 13px;
border: 1px solid #dfe2e5;
}

.markdown-body table tr {
background-color: #fff;
border-top: 1px solid #c6cbd1;
}

.markdown-body table tr:nth-child(2n) {
background-color: #f6f8fa;
}

.markdown-body img {
max-width: 100%;
box-sizing: content-box;
background-color: #fff;
}

.markdown-body img[align=right] {
padding-left: 20px;
}

.markdown-body img[align=left] {
padding-right: 20px;
}

.markdown-body code {
padding: 0.2em 0.4em;
margin: 0;
font-size: 85%;
background-color: rgba(27,31,35,0.05);
border-radius: 3px;
}

.markdown-body pre {
word-wrap: normal;
}

.markdown-body pre>code {
padding: 0;
margin: 0;
font-size: 100%;
word-break: normal;
white-space: pre;
background: transparent;
border: 0;
}

.markdown-body .highlight {
margin-bottom: 16px;
}

.markdown-body .highlight pre {
margin-bottom: 0;
word-break: normal;
}

.markdown-body .highlight pre,
.markdown-body pre {
padding: 16px;
overflow: auto;
font-size: 85%;
line-height: 1.45;
background-color: #f6f8fa;
border-radius: 3px;
}

.markdown-body pre code {
display: inline;
max-width: auto;
padding: 0;
margin: 0;
overflow: visible;
line-height: inherit;
word-wrap: normal;
background-color: transparent;
border: 0;
}

.markdown-body .full-commit .btn-outline:not(:disabled):hover {
color: #005cc5;
border-color: #005cc5;
}

.markdown-body kbd {
display: inline-block;
padding: 3px 5px;
font: 11px "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
line-height: 10px;
color: #444d56;
vertical-align: middle;
background-color: #fafbfc;
border: solid 1px #d1d5da;
border-bottom-color: #c6cbd1;
border-radius: 3px;
box-shadow: inset 0 -1px 0 #c6cbd1;
}

.markdown-body :checked+.radio-label {
position: relative;
z-index: 1;
border-color: #0366d6;
}

.markdown-body .task-list-item {
list-style-type: none;
}

.markdown-body .task-list-item+.task-list-item {
margin-top: 3px;
}

.markdown-body .task-list-item input {
margin: 0 0.2em 0.25em -1.6em;
vertical-align: middle;
}

.markdown-body hr {
border-bottom-color: #eee;
}

/*

github.com style (c) Vasily Polovnyov

*/

.hljs {
display: block;
overflow-x: auto;
padding: 0.5em;
color: #333;
background: #f8f8f8;
}

.hljs-comment,
.hljs-quote {
color: #998;
font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
color: #333;
font-weight: bold;
}

.hljs-number,
.hljs-literal,
.hljs-variable,
.hljs-template-variable,
.hljs-tag .hljs-attr {
color: #008080;
}

.hljs-string,
.hljs-doctag {
color: #d14;
}

.hljs-title,
.hljs-section,
.hljs-selector-id {
color: #900;
font-weight: bold;
}

.hljs-subst {
font-weight: normal;
}

.hljs-type,
.hljs-class .hljs-title {
color: #458;
font-weight: bold;
}

.hljs-tag,
.hljs-name,
.hljs-attribute {
color: #000080;
font-weight: normal;
}

.hljs-regexp,
.hljs-link {
color: #009926;
}

.hljs-symbol,
.hljs-bullet {
color: #990073;
}

.hljs-built_in,
.hljs-builtin-name {
color: #0086b3;
}

.hljs-meta {
color: #999;
font-weight: bold;
}

.hljs-deletion {
background: #fdd;
}

.hljs-addition {
background: #dfd;
}

.hljs-emphasis {
font-style: italic;
}

.hljs-strong {
font-weight: bold;
}

/* Flowchart variables */
/* Sequence Diagram variables */
/* Gantt chart variables */
.mermaid .label {
color: #333;
}
.node rect,
.node circle,
.node ellipse,
.node polygon {
fill: #ECECFF;
stroke: #CCCCFF;
stroke-width: 1px;
}
.edgePath .path {
stroke: #333333;
}
.edgeLabel {
background-color: #e8e8e8;
}
.cluster rect {
fill: #ffffde !important;
rx: 4 !important;
stroke: #aaaa33 !important;
stroke-width: 1px !important;
}
.cluster text {
fill: #333;
}
.actor {
stroke: #CCCCFF;
fill: #ECECFF;
}
text.actor {
fill: black;
stroke: none;
}
.actor-line {
stroke: grey;
}
.messageLine0 {
stroke-width: 1.5;
stroke-dasharray: "2 2";
marker-end: "url(#arrowhead)";
stroke: #333;
}
.messageLine1 {
stroke-width: 1.5;
stroke-dasharray: "2 2";
stroke: #333;
}
#arrowhead {
fill: #333;
}
#crosshead path {
fill: #333 !important;
stroke: #333 !important;
}
.messageText {
fill: #333;
stroke: none;
}
.labelBox {
stroke: #CCCCFF;
fill: #ECECFF;
}
.labelText {
fill: black;
stroke: none;
}
.loopText {
fill: black;
stroke: none;
}
.loopLine {
stroke-width: 2;
stroke-dasharray: "2 2";
marker-end: "url(#arrowhead)";
stroke: #CCCCFF;
}
.note {
stroke: #aaaa33;
fill: #fff5ad;
}
.noteText {
fill: black;
stroke: none;
font-family: 'trebuchet ms', verdana, arial;
font-size: 14px;
}
/** Section styling */
.section {
stroke: none;
opacity: 0.2;
}
.section0 {
fill: rgba(102, 102, 255, 0.49);
}
.section2 {
fill: #fff400;
}
.section1,
.section3 {
fill: white;
opacity: 0.2;
}
.sectionTitle0 {
fill: #333;
}
.sectionTitle1 {
fill: #333;
}
.sectionTitle2 {
fill: #333;
}
.sectionTitle3 {
fill: #333;
}
.sectionTitle {
text-anchor: start;
font-size: 11px;
text-height: 14px;
}
/* Grid and axis */
.grid .tick {
stroke: lightgrey;
opacity: 0.3;
shape-rendering: crispEdges;
}
.grid path {
stroke-width: 0;
}
/* Today line */
.today {
fill: none;
stroke: red;
stroke-width: 2px;
}
/* Task styling */
/* Default task */
.task {
stroke-width: 2;
}
.taskText {
text-anchor: middle;
font-size: 11px;
}
.taskTextOutsideRight {
fill: black;
text-anchor: start;
font-size: 11px;
}
.taskTextOutsideLeft {
fill: black;
text-anchor: end;
font-size: 11px;
}
/* Specific task settings for the sections*/
.taskText0,
.taskText1,
.taskText2,
.taskText3 {
fill: white;
}
.task0,
.task1,
.task2,
.task3 {
fill: #8a90dd;
stroke: #534fbc;
}
.taskTextOutside0,
.taskTextOutside2 {
fill: black;
}
.taskTextOutside1,
.taskTextOutside3 {
fill: black;
}
/* Active task */
.active0,
.active1,
.active2,
.active3 {
fill: #bfc7ff;
stroke: #534fbc;
}
.activeText0,
.activeText1,
.activeText2,
.activeText3 {
fill: black !important;
}
/* Completed task */
.done0,
.done1,
.done2,
.done3 {
stroke: grey;
fill: lightgrey;
stroke-width: 2;
}
.doneText0,
.doneText1,
.doneText2,
.doneText3 {
fill: black !important;
}
/* Tasks on the critical line */
.crit0,
.crit1,
.crit2,
.crit3 {
stroke: #ff8888;
fill: red;
stroke-width: 2;
}
.activeCrit0,
.activeCrit1,
.activeCrit2,
.activeCrit3 {
stroke: #ff8888;
fill: #bfc7ff;
stroke-width: 2;
}
.doneCrit0,
.doneCrit1,
.doneCrit2,
.doneCrit3 {
stroke: #ff8888;
fill: lightgrey;
stroke-width: 2;
cursor: pointer;
shape-rendering: crispEdges;
}
.doneCritText0,
.doneCritText1,
.doneCritText2,
.doneCritText3 {
fill: black !important;
}
.activeCritText0,
.activeCritText1,
.activeCritText2,
.activeCritText3 {
fill: black !important;
}
.titleText {
text-anchor: middle;
font-size: 18px;
fill: black;
}
/*

*/
.node text {
font-family: 'trebuchet ms', verdana, arial;
font-size: 14px;
}
div.mermaidTooltip {
position: absolute;
text-align: center;
max-width: 200px;
padding: 2px;
font-family: 'trebuchet ms', verdana, arial;
font-size: 12px;
background: #ffffde;
border: 1px solid #aaaa33;
border-radius: 2px;
pointer-events: none;
z-index: 100;
}

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format("woff"),url(fonts/KaTeX_Fraktur-Bold-ad26cc83.ttf) format("truetype")}@font-face{font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Fraktur-Regular-ae2b6f43.woff2) format("woff2"),url(fonts/KaTeX_Fraktur-Regular-f980ca72.woff) format("woff"),url(fonts/KaTeX_Fraktur-Regular-d459632e.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(fonts/KaTeX_Main-Bold-83f8b326.woff2) format("woff2"),url(fonts/KaTeX_Main-Bold-d8a629d2.woff) format("woff"),url(fonts/KaTeX_Main-Bold-e69b9513.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(fonts/KaTeX_Main-BoldItalic-0719833c.woff2) format("woff2"),url(fonts/KaTeX_Main-BoldItalic-5aeca883.woff) format("woff"),url(fonts/KaTeX_Main-BoldItalic-bdbadb27.ttf) format("truetype")}@font-face{font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(fonts/KaTeX_Main-Italic-07510ed0.woff2) 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format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:normal;font-weight:700;src:url(fonts/KaTeX_SansSerif-Bold-94911c5b.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Bold-bfe58d70.woff) format("woff"),url(fonts/KaTeX_SansSerif-Bold-f5f6a30d.ttf) format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:italic;font-weight:400;src:url(fonts/KaTeX_SansSerif-Italic-6a5b5cc9.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Italic-dabdeee1.woff) format("woff"),url(fonts/KaTeX_SansSerif-Italic-5110f85c.ttf) format("truetype")}@font-face{font-family:"KaTeX_SansSerif";font-style:normal;font-weight:400;src:url(fonts/KaTeX_SansSerif-Regular-7d5fa3e2.woff2) format("woff2"),url(fonts/KaTeX_SansSerif-Regular-48c7df6f.woff) format("woff"),url(fonts/KaTeX_SansSerif-Regular-8075d14a.ttf) format("truetype")}@font-face{font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Script-Regular-c472b570.woff2) format("woff2"),url(fonts/KaTeX_Script-Regular-5acb381b.woff) format("woff"),url(fonts/KaTeX_Script-Regular-abb12fc2.ttf) format("truetype")}@font-face{font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Size1-Regular-feed6c70.woff2) format("woff2"),url(fonts/KaTeX_Size1-Regular-bdd0d5e0.woff) format("woff"),url(fonts/KaTeX_Size1-Regular-8cc60fd5.ttf) format("truetype")}@font-face{font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Size2-Regular-8a86a0af.woff2) format("woff2"),url(fonts/KaTeX_Size2-Regular-fd67fb35.woff) format("woff"),url(fonts/KaTeX_Size2-Regular-5976fffd.ttf) format("truetype")}@font-face{font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(fonts/KaTeX_Size3-Regular-2c1ea030.woff2) format("woff2"),url(fonts/KaTeX_Size3-Regular-943c94f8.woff) format("woff"),url(fonts/KaTeX_Size3-Regular-e929f5d9.ttf) 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color: #8a6d3b;
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border-color: #faebcc;
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color: #a94442;
background-color: #f2dede;
border-color: #ebccd1;
}
abbr[title] {
cursor: help;
border-bottom: 1px dotted #777;
}
ul.table-of-contents {
list-style-type: none;
}
ul.table-of-contents li {
margin: 4px 0;
}
.markdown-body table {
width: auto;
display: table;
}
.markdown-body table td,
.markdown-body table th {
word-break: break-all;
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.markdown-body.ace_search .highlight pre,
.markdown-body.ace_search pre {
overflow: visible !important;
width: -webkit-fit-content !important;
width: fit-content !important;
}
-->

问题描述：

服务器内存不够了 需要加8G内存，加内存需要重启服务器，但是重启后Docker容器启动成功，端口也映射了，就是外网访问不了。

看了下容器是正常运行的端口也是映射成功的：

给阿里云提工单

给阿里云提工单了，人家也不知道什么原因，建议我自己抓包排查！！哎。。。

还是自己研究吧

google搜索了一下 关键字：docker 重启 端口映射失效

挑选了如下2篇文章看了下：

https://www.cnblogs.com/zl1991/p/10531726.html

摘要：

https://py3.io/Docker/

摘要：

总结一下 上面2篇文章，关键字就是 iptables 服务 和 Docker的端口映射存在关联

  1. 第一步我检查下服务器的iptables服务

可以看出 iptables服务存在问题 居然关不了

  1. 这里我猜测：可能是因为重启服务器导致iptables发生问题，iptables 挂了 会影响Docker的端口映射
  2. 如何救活iptables服务

参考：https://stackoverflow.com/questions/24756240/how-can-i-use-iptables-on-centos-7

  1. OK照着做救活了iptables服务

  2. 开启iptables服务试了下 没有问题

  3. 在iptables开启的状态下 尝试下访问 依然失败

  4. 重新把iptables关闭，尝试下访问 成功！！！！

总结：

如果之前Docker容器暴露的端口可以访问，当你重启服务器后，访问不了了。

检查下是否iptables服务正常，

如果出现类似： Failed to restart iptables.service: Unit not found. 的错误，那么就把iptables服务重装后再试试。我就是这么尝试成功了！！！

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