一、问题
在docker上跑Selenium+ChromeDriver+Chrome无头模式报错：
UnknownError: unknown error: session deleted because of page crash
from tab crashed
(Session info: chrome=43.0.2357.81)
(Driver info: chromedriver=2.15.322448 (52179c1b310fec1797c81ea9a20326839860b7d3),platform=Linux 3.13.0-32-generic x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 53 milliseconds
Build info: version: '2.45.0', revision: '5017cb8', time: '2015-02-26 23:59:50'
System info: host: 'zelenium', ip: '127.0.1.1', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-32-generic', java.version: '1.7.0_80'
Session ID: b12eb3c43351dad58746798c40078ef9
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{platform=LINUX, acceptSslCerts=true, javascriptEnabled=true, browserName=chrome, chrome={userDataDir=/tmp/.com.google.Chrome.11yHIh}, rotatable=false, locationContextEnabled=true, mobileEmulationEnabled=false, version=43.0.2357.81, takesHeapSnapshot=true, cssSelectorsEnabled=true, databaseEnabled=false, handlesAlerts=true, browserConnectionEnabled=false, webStorageEnabled=true, nativeEvents=true, applicationCacheEnabled=false, takesScreenshot=true}]二、分析
/dev/shm太小了，要扩容
三、解决方案
3.1 如果环境是Kubernetes(k8s)请参考：Kubernetes(k8s) docker 修改 /dev/shm大小
3.2 如何修改/dev/shm大小?
/dev/shm在/etc/fstab中挂载，对应tmpfs，实际使用的是内存的空间。默认情况下，/dev/shm为物理内存大小的一半。因而，调整/dev/shm大小有两种方式：
加大Linux的物理内存
在/etc/fstab中明确指定/dev/shm的挂载sizes大小参数
[root@centos-fuwenchao mntsda3]# df -h /dev/shm
Filesystem Size Used Avail Use% Mounted on
tmpfs 935M 228K 935M 1% /dev/shm[root@centos-fuwenchao mntsda3]# vi /etc/fstab
2 #
3 # /etc/fstab
4 # Created by anaconda on Fri Nov 1 21:18:42 2013
5 #
6 # Accessible filesystems, by reference, are maintained under '/dev/disk'
7 # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
8 #
9 UUID=8e319772-a274-4031-a53f-1178b3ab4de6 / ext4 defaults 1 1
10 UUID=ad4de750-9575-4040-a403-08c0642f0f2c swap swap defaults 0 0
11 tmpfs /dev/shm tmpfs defaults 0 0
12 devpts /dev/pts devpts gid=5,mode=620 0 0
13 sysfs /sys sysfs defaults 0 0
14 proc /proc proc defaults 0 0[root@centos-fuwenchao mntsda3]# cp /etc/fstab /etc/fstab.20140218
[root@centos-fuwenchao mntsda3]# vi /etc/fstab
1
2 #
3 # /etc/fstab
4 # Created by anaconda on Fri Nov 1 21:18:42 2013
5 #
6 # Accessible filesystems, by reference, are maintained under '/dev/disk'
7 # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
8 #
9 UUID=8e319772-a274-4031-a53f-1178b3ab4de6 / ext4 defaults 1 1
10 UUID=ad4de750-9575-4040-a403-08c0642f0f2c swap swap defaults 0 0
11 tmpfs /dev/shm tmpfs defaults,size=1024M 0 0
12 devpts /dev/pts devpts gid=5,mode=620 0 0
13 sysfs /sys sysfs defaults 0 0
14 proc /proc proc defaults 0 0重新挂载
[root@centos-fuwenchao mntsda3]# mount -o remount /dev/shm
[root@centos-fuwenchao mntsda3]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 9.7G 4.6G 4.7G 50% /
tmpfs 1.0G 228K 1.0G 1% /dev/shm
/dev/sr0 4.1G 4.1G 0 100% /media/CentOS_6.4_Final
/dev/sda3 38G 176M 36G 1% /mnt/mntsda3参考：
- 修改/dev/shm大小
- stackoverflow
- docker 中运行无头浏览器报错