Openshift生产环境部署配置事项
容器会在物联网中大放异彩
1. 磁盘目录挂载
master
磁盘格式:xfs
/var/log
/var/lib/docker
/var/lib/etcd [ssd]node
磁盘格式:xfs
/var/log
/var/lib/docker
2. 关闭swap
swapoff -a cat /etc/fstab ## 注释掉swap
3. 打开seLinux enabled
touch /.autorelabel sed -i 's/SELINUX=disabled/SELINUX=permissive/' /etc/selinux/config
4. 关闭系统ipv6
$ cat /etc/sysctl.conf # 禁用整个系统所有接口的IPv6net.ipv6.conf.all.disable_ipv6 = 1$ sysctl -p /etc/sysctl.conf
5. 更改resolve.conf
$ cat /etc/resolv.conf search cluster.local nameserver 192.168.0.2
6. 时间同步
$ ansible all -m package -a 'name=chrony state=present'## chronyd服务端配置$ cat /etc/chrony.conf server 55.15.226.193 iburst allow 55.15.226.0/24local stratum 10
强制同步时间
## chrony客户端配置systemctl sources -v systemctl stop chronyd chronyd -q 'pool 55.15.226.193 iburst'
7.创建docker 用户组
groupadd docker
8. docker-storage设置
/etc/sysconfig/docker-storage
DOCKER_STORAGE_OPTIONS="--storage-driver overlay2 "
9. 网卡配置
NetworkManager, 是一个提供网络检测和配置网络的工具,在Node节点需要使用它来自动配置节点的dnsmasq作为默认的网络入口。
网络设备的配置中/etc/sysconfig/network-scripts/ifcfg-eth*默认
NM_CONTROLLED
是被设置为yes
,如果它被设置为no
,那么NetworkManager应用将不会去自动创建dnsmasq相关的配置,所以此时需要手动配置dnsmasq。
添加文件
$ cat /etc/dnsmasq.d/origin-upstream-dns.conf server=192.168.0.2$ cat /etc/origin/node/resolv.conf nameserver 192.168.0.2
参考 install-config-network-using-firewalld
10. 双网卡
一张网卡配置为访问业务流量
另一张网卡配置为访问存储NAS流量
11.外部节点相关组件
时间同步服务(chronyd)
DNS(dnsmasq)
镜像仓库(docker-distribution)
负载均衡器(Haproxy)
12. 外部镜像仓库授权
将私有镜像仓库的CA文件拷贝到镜像仓库所在服务器的/etc/pki/ca-trust/source/anchors/目录下
$ ansible all -m copy -a 'src=registry.crt dest=/etc/pki/ca-trust/source/anchors/registry.crt'
13. 内核优化(openshift安装会自动配置)
$ ansible all -m package -a 'name=tuned state=present'$ ansible all -m service -a 'name=tuned state=started enabled=true'$ ansible all -m shell -a 'tuned-adm profile throughput-performance'
14. ansible设置reserved
[OSEv3:vars] openshift_node_kubelet_args={'pods-per-core': ['10'], 'max-pods': ['250'], 'image-gc-high-threshold': ['90'], 'image-gc-low-threshold': ['80'], 'system-reserved':['cpu=200m', 'memory=1G'], 'kube-reserved':['cpu=200m','memory=1G']}
15. ansible中设置Docker存储type及Docker与etcd额外磁盘
[OSEv3:vars]# Docker setup for extra disks on nodescontainer_runtime_docker_storage_setup_device=/dev/vdbcontainer_runtime_docker_storage_type=overlay2 openshift_node_local_quota_per_fsgroup=512Mi [masters:vars] container_runtime_extra_storage=[{'device': '/dev/vdc', 'path': '/var/lib/origin/openshift.local.volumes', 'options': 'gquota', 'filesystem': 'xfs', 'format': 'True'}, {'device': '/dev/vdd', 'path': '/var/lib/etcd', 'hosts': 'masters', 'filesystem': 'xfs', 'format': 'True'}] [nodes:vars] container_runtime_extra_storage=[{'device': '/dev/vdc', 'path': '/var/lib/origin/openshift.local.volumes', 'options': 'gquota', 'filesystem': 'xfs', 'format': 'True'}]
16. 设置日志自动归档
journal日志归档
设置/etc/systemd/journald.conf
$ cat /etc/systemd/journald.conf [Journal] Storage=persistent Compress=yes#Seal=yes#SplitMode=uidSyncIntervalSec=1s RateLimitInterval=1s RateLimitBurst=10000SystemMaxUse=1G SystemKeepFree=20% SystemMaxFileSize=10M#RuntimeMaxUse=#RuntimeKeepFree=#RuntimeMaxFileSize=MaxRetentionSec=3days MaxFileSec=1day ForwardToSyslog=False#ForwardToKMsg=no#ForwardToConsole=noForwardToWall=False#TTYPath=/dev/console#MaxLevelStore=debug#MaxLevelSyslog=debug#MaxLevelKMsg=notice#MaxLevelConsole=info#MaxLevelWall=emerg$ systemctl restart systemd-journald
或者部署时更新以下文件内容(openshift 3.9以上)roles/openshift_node/defaults/main.yml
...journald_vars_to_replace:- { var: Storage, val: persistent }- { var: Compress, val: yes }- { var: SyncIntervalSec, val: 1s }- { var: RateLimitInterval, val: 1s }- { var: RateLimitBurst, val: 10000 }- { var: SystemMaxUse, val: 1G }- { var: SystemKeepFree, val: 20% }- { var: SystemMaxFileSize, val: 10M }- { var: MaxRetentionSec, val: 3days }- { var: MaxFileSec, val: 1day }- { var: ForwardToSyslog, val: no }- { var: ForwardToWall, val: no } ...
message日志归档
只收集warning以上的日志/etc/rsyslog.conf
$ cat /etc/rsyslog.conf *.warning;mail.none;authpriv.none;cron.none /var/log/messages
将message日志只保留最近三天的日志
$ cat /etc/logrotate.d/syslog /var/log/cron /var/log/messages { daily rotate 3 sharedscripts postrotate /bin/kill -HUP `cat /var/run/syslogd.pid 2> /dev/null` 2> /dev/null || true endscript }
作者:潘晓华Michael
链接:https://www.jianshu.com/p/66855cd8bc3e
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