一、Docker启动异常表现:
1.状态反复restaring,用命令查看
$docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 21c09be88c11 docker.xxxx.cn:5000/xxx-tes/xxx_tes:1.0.6 "/usr/local/tomcat..." 9 days ago Restarting (1) Less than a second ago xxx10
2.Docker日志有明显问题:
$docker logs [容器名/容器ID]
二、Docker启动异常的可能原因:
2.1.内存不够
Docker 启动至少需要2G内存,首先执行free -mh命令查看剩余内存是否足够
直接查看内存
$free -mh total used free shared buff/cache available Mem: 15G 14G 627M 195M 636M 726M Swap: 0B 0B 0B
分析日志
有时候一瞬间内存过载溢出,导致部分进程被杀死,看起来内存也是够用的,事实上docker还是会反复重启,就需要通过docker日志和系统日志信的息来进一步分析:
分析docker日志
查看docker日志看到内存溢出的信息,要仔细翻阅才能找到信息,并不是在最下面
$docker logs [容器名/容器ID]|less Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000769990000, 1449590784, 0) failed; error='Cannot allocate memory' (errno=12) # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (malloc) failed to allocate 1449590784 bytes for committing reserved memory. # An error report file with more information is saved as: # //hs_err_pid1.log Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000769990000, 1449590784, 0) failed; error='Cannot allocate memory' (errno=12) # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (malloc) failed to allocate 1449590784 bytes for committing reserved memory. # An error report file with more information is saved as: # /tmp/hs_err_pid1.log Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000769990000, 1449590784, 0) failed; error='Cannot allocate memory' (errno=12) # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (malloc) failed to allocate 1449590784 bytes for committing reserved memory. # Can not save log file, dump to screen.. # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (malloc) failed to allocate 1449590784 bytes for committing reserved memory. # Possible reasons: # The system is out of physical RAM or swap space # In 32 bit mode, the process size limit was hit # Possible solutions: # Reduce memory load on the system # Increase physical memory or swap space # Check if swap backing store is full # Use 64 bit Java on a 64 bit OS # Decrease Java heap size (-Xmx/-Xms) # Decrease number of Java threads # Decrease Java thread stack sizes (-Xss) # Set larger code cache with -XX:ReservedCodeCacheSize= # This output file may be truncated or incomplete. # # Out of Memory Error (os_linux.cpp:2756), pid=1, tid=140325689620224 # # JRE version: (7.0_79-b15) (build ) # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.79-b02 mixed mode linux-amd64 compressed oops) # Core dump written. Default location: //core or core.1 #
分析系统日志
查看系统日志,发现有大量由于内存溢出,进程被杀死的记录
$grep -i 'Out of Memory' /var/log/messages Apr 7 10:04:02 centos106 kernel: Out of memory: Kill process 1192 (java) score 54 or sacrifice child Apr 7 10:08:00 centos106 kernel: Out of memory: Kill process 2301 (java) score 54 or sacrifice child Apr 7 10:09:59 centos106 kernel: Out of memory: Kill process 28145 (java) score 52 or sacrifice child Apr 7 10:20:40 centos106 kernel: Out of memory: Kill process 2976 (java) score 54 or sacrifice child Apr 7 10:21:08 centos106 kernel: Out of memory: Kill process 3577 (java) score 47 or sacrifice child Apr 7 10:21:08 centos106 kernel: Out of memory: Kill process 3631 (java) score 47 or sacrifice child Apr 7 10:21:08 centos106 kernel: Out of memory: Kill process 3634 (java) score 47 or sacrifice child Apr 7 10:21:08 centos106 kernel: Out of memory: Kill process 3640 (java) score 47 or sacrifice child Apr 7 10:21:08 centos106 kernel: Out of memory: Kill process 3654 (java) score 47 or sacrifice child Apr 7 10:27:27 centos106 kernel: Out of memory: Kill process 6998 (java) score 51 or sacrifice child Apr 7 10:27:28 centos106 kernel: Out of memory: Kill process 7027 (java) score 52 or sacrifice child Apr 7 10:28:10 centos106 kernel: Out of memory: Kill process 7571 (java) score 42 or sacrifice child Apr 7 10:28:10 centos106 kernel: Out of memory: Kill process 7586 (java) score 42 or sacrifice child
2.2.端口冲突
该docker监听端口已经被其他进程占用,一般此种问题容易出现在新部署的服务,或在原有机器上部署新的后台服务,所以在部署之前应该执行命令检查端口是否已经被占用,如果上线后发现占有则应改为可用端口再重启之。
检查命令: $netstat -nltp|grep [规划的端口号]
三、对策
3.1.内存不够的对策:
对策1:
3.1.1 saltstack的minion在运行过久之后,可能占用大量内存,需要将其重启。重启命令可能有时并不起作用。主要检查运行状态,如果未成功停止,则重新重启;
对策2:
3.2.2 ELK日志收集程序或者其他java进程占用过高,用top和ps命令排查,谨慎确定进程的作用,在确保不影响业务的情况下,停止相关进程;
对策3:
释放被占用的内存(buff/cache):
$sync #将内存数据写入磁盘
$echo 3 > /proc/sys/vm/drop_caches #释放被占用的内存
对策4:
有时候并不是buff/cache过高导致内存不够用,确实是被很多必要的进程消耗掉了内存,那就需要从机器资源分配使用的层面去考虑和解决了。
3.2 端口冲突的对策
对策1:
一般此种问题容易出现在新部署的服务,或在原有机器上部署新的后台服务,所以在部署之前应该执行命令检查端口是否已经被占用,如果上线后发现占有则应改为可用端口再重启之。
检查命令: $netstat -nltp|grep [规划的端口号]
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
Docker无法正常启动
RTX 5090要首发 性能要翻倍!三星展示GDDR7显存
三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。
首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。
据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。
更新动态
- 雨林唱片《赏》新曲+精选集SACD版[ISO][2.3G]
- 罗大佑与OK男女合唱团.1995-再会吧!素兰【音乐工厂】【WAV+CUE】
- 草蜢.1993-宝贝对不起(国)【宝丽金】【WAV+CUE】
- 杨培安.2009-抒·情(EP)【擎天娱乐】【WAV+CUE】
- 周慧敏《EndlessDream》[WAV+CUE]
- 彭芳《纯色角3》2007[WAV+CUE]
- 江志丰2008-今生为你[豪记][WAV+CUE]
- 罗大佑1994《恋曲2000》音乐工厂[WAV+CUE][1G]
- 群星《一首歌一个故事》赵英俊某些作品重唱企划[FLAC分轨][1G]
- 群星《网易云英文歌曲播放量TOP100》[MP3][1G]
- 方大同.2024-梦想家TheDreamer【赋音乐】【FLAC分轨】
- 李慧珍.2007-爱死了【华谊兄弟】【WAV+CUE】
- 王大文.2019-国际太空站【环球】【FLAC分轨】
- 群星《2022超好听的十倍音质网络歌曲(163)》U盘音乐[WAV分轨][1.1G]
- 童丽《啼笑姻缘》头版限量编号24K金碟[低速原抓WAV+CUE][1.1G]