部署后博客一直正常运行，最近忙于加班没访问，昨晚元旦准备补几篇文章，发现博客无法访问，报502错误。
博客地址：blog.ziyong.site
发现报错后，排除CDN问题，无论是使用 IP:端口还是DNS域名直接指向服务器，都无法访问
近期没有做手动升级等动作，未做任何操作，感觉是莫名崩掉。
尝试应用商店内升级到2.11——失败
尝试docker内升级到2.11——升级成功，但是无法启动，一直在重启状态
通过应用商店内重建，恢复到2.8——docker启动日志有报错如下
尝试使用8月份的halo备份，在应用商店内恢复——恢复后还是报502，docker启动有报错
根据论坛经验，尝试重新打开外网访问端口后重建——无效
根据论坛经验，尝试添加以下参数 PANEL_DB_TYPE="mysql"——无效
求助：
1.如何修复该问题？博客内有大量原创文章且无完整备份，实在不愿损失掉。
2.如果无法修复启动，必须重装，那么如何保留这些数据？
3.查看Mysql数据库内只有一张表，看到json字段有存文章，不知如何使用其恢复？
在此先谢过帮顶和帮解决的各位同学
docker报错如下
> 	at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:636) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:629) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:118) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1105) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:1044) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:432) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsResolveContext.onResponse(DnsResolveContext.java:662) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsResolveContext.access$500(DnsResolveContext.java:66) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsResolveContext$2.operationComplete(DnsResolveContext.java:489) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:590) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:583) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:559) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:492) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:636) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:625) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:105) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsQueryContext.trySuccess(DnsQueryContext.java:317) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsQueryContext.finishSuccess(DnsQueryContext.java:309) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.resolver.dns.DnsNameResolver$DnsResponseHandler.channelRead(DnsNameResolver.java:1390) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.epoll.EpollDatagramChannel.processPacket(EpollDatagramChannel.java:662) ~[netty-transport-classes-epoll-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.epoll.EpollDatagramChannel.recvmsg(EpollDatagramChannel.java:697) ~[netty-transport-classes-epoll-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.epoll.EpollDatagramChannel.access$300(EpollDatagramChannel.java:56) ~[netty-transport-classes-epoll-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:536) ~[netty-transport-classes-epoll-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:499) ~[netty-transport-classes-epoll-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:397) ~[netty-transport-classes-epoll-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.94.Final.jar:4.1.94.Final]
	at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]
	Suppressed: java.lang.Exception: #block terminated with an error
		at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:103) ~[reactor-core-3.5.8.jar:3.5.8]
		at reactor.core.publisher.Mono.block(Mono.java:1712) ~[reactor-core-3.5.8.jar:3.5.8]
		at org.springframework.boot.r2dbc.init.R2dbcScriptDatabaseInitializer.runScripts(R2dbcScriptDatabaseInitializer.java:68) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.runScripts(AbstractScriptDatabaseInitializer.java:146) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.applyScripts(AbstractScriptDatabaseInitializer.java:108) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.applySchemaScripts(AbstractScriptDatabaseInitializer.java:98) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.initializeDatabase(AbstractScriptDatabaseInitializer.java:76) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.afterPropertiesSet(AbstractScriptDatabaseInitializer.java:66) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1817) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1766) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:598) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:973) ~[spring-beans-6.0.11.jar:6.0.11]
		at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:942) ~[spring-context-6.0.11.jar:6.0.11]
		at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:608) ~[spring-context-6.0.11.jar:6.0.11]
		at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:66) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:436) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) ~[spring-boot-3.1.2.jar:3.1.2]
		at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:150) ~[spring-boot-3.1.2.jar:3.1.2]
		at run.halo.app.Application.main(Application.java:28) ~[classes/:2.8.0]
		at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
		at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:na]
		at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:na]
		at java.base/java.lang.reflect.Method.invoke(Unknown Source) ~[na:na]
		at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49) ~[application/:na]
		at org.springframework.boot.loader.Launcher.launch(Launcher.java:95) ~[application/:na]
		at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) ~[application/:na]
		at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:65) ~[application/:na]
Caused by: org.springframework.dao.DataAccessResourceFailureException: Failed to obtain R2DBC Connection
	at org.springframework.r2dbc.connection.ConnectionFactoryUtils.lambda$getConnection$0(ConnectionFactoryUtils.java:90) ~[spring-r2dbc-6.0.11.jar:6.0.11]
	at reactor.core.publisher.Mono.lambda$onErrorMap$28(Mono.java:3783) ~[reactor-core-3.5.8.jar:3.5.8]
	at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:94) ~[reactor-core-3.5.8.jar:3.5.8]
	... 71 common frames omitted
Caused by: java.net.UnknownHostException: Failed to resolve 'mysql' [A(1)] after 2 queries 
	at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1097) ~[netty-resolver-dns-4.1.94.Final.jar:4.1.94.Final]
	... 36 common frames omitted


    __  __      __
   / / / /___ _/ /___
  / /_/ / __ `/ / __ \
 / __  / /_/ / / /_/ /
/_/ /_/\__,_/_/\____/

Version: 2.8.0
2023-12-30T07:38:14.321+08:00  INFO 7 --- [           main] run.halo.app.Application                 : Starting Application v2.8.0 using Java 17.0.8 with PID 7 (/application/BOOT-INF/classes started by root in /application)
2023-12-30T07:38:14.343+08:00  INFO 7 --- [           main] run.halo.app.Application                 : No active profile set, falling back to 1 default profile: "default"
2023-12-30T07:38:16.459+08:00  INFO 7 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode
2023-12-30T07:38:16.462+08:00  INFO 7 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data R2DBC repositories in DEFAULT mode.
2023-12-30T07:38:16.736+08:00  INFO 7 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 261 ms. Found 1 R2DBC repository interfaces.
2023-12-30T07:38:19.981+08:00  INFO 7 --- [           main] org.pf4j.DefaultPluginStatusProvider     : Enabled plugins: []
2023-12-30T07:38:19.983+08:00  INFO 7 --- [           main] org.pf4j.DefaultPluginStatusProvider     : Disabled plugins: []
2023-12-30T07:38:19.986+08:00  INFO 7 --- [           main] org.pf4j.DefaultPluginManager            : PF4J version 3.9.0 in 'deployment' mode
2023-12-30T07:38:22.233+08:00  INFO 7 --- [           main] o.s.b.a.e.web.EndpointLinksResolver      : Exposing 6 endpoint(s) beneath base path '/actuator'