CentOS Stream 9、Rocky Linux 9 等 rhel 9 系统。在 Docker 容器的 CentOS7 镜像执行 yum 操作 特别慢。 是因为 open files 太大了。
先查看之前的 ulimit
docker run -it --tty --network host --name centos7 centos:centos7.9.2009 /bin/bash
ulimit -a
输出
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 30537
max locked memory (kbytes, -l) 8192
max memory size (kbytes, -m) unlimited
open files (-n) 1073741816
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) unlimited
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
替换源
for f in /etc/yum.repos.d/*.repo
do
mv -f "$f" "${f}.backup"
done
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.huaweicloud.com/artifactory/os-conf/centos/centos-7.repo
yum makecache -y
yum update -y
直接卡死在 Updating : glibc-2.17-326.el7_9.3.x86_64
现在我们重新加上 ulimit
docker run -it --tty --network host --name centos7 --ulimit "nofile=1024:1048576" centos:centos7.9.2009 /bin/bash
ulimit -a
输出
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 30537
max locked memory (kbytes, -l) 8192
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) unlimited
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
执行上面的步骤，就不会卡死了。