centos7.7 openshift 3.9 All_in_one 安装体验

1- 环境说明

os	ip	vcpu	ram	disk	kernel
centos7.7 mini	192.168.116.129	2	8G	120G	4.13

2- 安装

• 升级内核

wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-lt-4.4.244-1.el7.elrepo.x86_64.rpm
wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-lt-doc-4.4.244-1.el7.elrepo.noarch.rpm

yum localinstall -y kernel-lt-*
sed -i 'ssavedg' /etc/default/grub
grub2-mkconfig -o /boot/grub2/grub.cfg

• 内核参数优化

systemctl enable rc-local
chmod a+x /etc/rc.d/rc.local
systemctl restart rc-local

cat >> /etc/rc.local  << EOF
modprobe ip_vs_rr
modprobe br_netfilter
EOF

cat > /etc/modules-load.d/ipvs.conf << EOF
ip_vs_rr
br_netfilter
EOF

systemctl enable --now systemd-modules-load.service

cat >/etc/sysctl.d/kubernetes.conf <<EOF
net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-ip6tables=1
net.ipv4.ip_forward=1
net.ipv4.tcp_tw_recycle=0
vm.swappiness=0
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_instances=8192
fs.inotify.max_user_watches=1048576
fs.file-max=52706963
fs.nr_open=52706963
net.ipv6.conf.all.disable_ipv6=1
net.netfilter.nf_conntrack_max=2310720
EOF

sysctl -p /etc/sysctl.d/kubernetes.conf

reboot

• 安装docker-ce

yum remove docker docker-common docker-selinux docker-engine -y  #如果你之前安装过 docker，请先删掉
yum install -y yum-utils device-mapper-persistent-data lvm2 #安装一些依赖
curl -o /etc/yum.repos.d/docker-ce.repo https://files-cdn.cnblogs.com/files/lemanlai/docker-ce.repo.sh
yum clean all
yum makecache fast

yum -y install docker-ce
systemctl enable docker
mkdir -p /etc/docker
cat << EOF > /etc/docker/daemon.json
{"registry-mirrors": ["http://f1361db2.m.daocloud.io"],
"insecure-registries":["172.30.0.0/16"]}
EOF

systemctl daemon-reload
systemctl restart docker

• 启动openshift

## 下载客户端命令
wget https://github.com/openshift/origin/releases/download/v3.9.0/openshift-origin-client-tools-v3.9.0-191fece-linux-64bit.tar.gz

tar -zxvf openshift-origin-client-tools-v3.9.0-191fece-linux-64bit.tar.gz

mv openshift-origin-client-tools-v3.9.0-191fece-linux-64bit/oc /usr/local/bin/

# 查看版本
[root@ocp3 ~]# oc version
oc v3.9.0+191fece
kubernetes v1.9.1+a0ce1bc657
features: Basic-Auth GSSAPI Kerberos SPNEGO

# 启动参数
[root@ocp3 ~]# oc cluster up --help
Starts an OpenShift cluster using Docker containers, provisioning a registry, router, initial
templates, and a default project.

This command will attempt to use an existing connection to a Docker daemon. Before running the
command, ensure that you can execute docker commands successfully (i.e. 'docker ps').

Optionally, the command can create a new Docker machine for OpenShift using the VirtualBox driver
when the --create-machine argument is specified. The machine will be named 'openshift' by default.
To name the machine differently, use the --docker-machine=NAME argument. If the
--docker-machine=NAME argument is specified, but --create-machine is not, the command will attempt
to find an existing docker machine with that name and start it if it's not running.

By default, the OpenShift cluster will be setup to use a routing suffix that ends in nip.io. This is
to allow dynamic host names to be created for routes. An alternate routing suffix can be specified
using the --routing-suffix flag.

A public hostname can also be specified for the server with the --public-hostname flag.

Usage:
  oc cluster up [options]

Examples:
  # Start OpenShift on a new docker machine named 'openshift'
  oc cluster up --create-machine

  # Start OpenShift using a specific public host name
  oc cluster up --public-hostname=my.address.example.com

  # Start OpenShift and preserve data and config between restarts
  oc cluster up --host-data-dir=/mydata --use-existing-config

  # Use a different set of images
  oc cluster up --image="registry.example.com/origin" --version="v1.1"

  # Specify which set of image streams to use
  oc cluster up --image-streams=centos7

Options:
      --create-machine=false: Create a Docker machine if one doesn't exist
      --docker-machine='': Specify the Docker machine to use
  -e, --env=[]: Specify a key-value pair for an environment variable to set on OpenShift container
      --forward-ports=false: Use Docker port-forwarding to communicate with origin container.
Requires 'socat' locally.
      --host-config-dir='/var/lib/origin/openshift.local.config': Directory on Docker host for
OpenShift configuration
      --host-data-dir='': Directory on Docker host for OpenShift data. If not specified, etcd data
will not be persisted on the host.
      --host-pv-dir='/var/lib/origin/openshift.local.pv': Directory on host for OpenShift persistent
volumes
      --host-volumes-dir='/var/lib/origin/openshift.local.volumes': Directory on Docker host for
OpenShift volumes
      --http-proxy='': HTTP proxy to use for master and builds
      --https-proxy='': HTTPS proxy to use for master and builds
      --image='openshift/origin': Specify the images to use for OpenShift
      --image-streams='centos7': Specify which image streams to use, centos7|rhel7
      --logging=false: Install logging (experimental)
      --metrics=false: Install metrics (experimental)
      --no-proxy=[]: List of hosts or subnets for which a proxy should not be used
      --public-hostname='': Public hostname for OpenShift cluster
      --routing-suffix='': Default suffix for server routes
      --server-loglevel=0: Log level for OpenShift server
      --service-catalog=false: Install service catalog (experimental).
      --skip-registry-check=false: Skip Docker daemon registry check
      --use-existing-config=false: Use existing configuration if present
      --version='': Specify the tag for OpenShift images

Use "oc options" for a list of global command-line options (applies to all commands).

# 启动
oc cluster up --host-data-dir="/opt" --public-hostname='192.168.116.129'

# 启动
mkdir -p /opt/ocp3.9/data    # openshift 数据

oc cluster up  --public-hostname='192.168.116.129' --logging=true  --metrics=true --server-loglevel=0  --image-streams='centos7' --host-data-dir='/opt/ocp3.9/data'

启动过程：

[root@ocp3 ~]#  oc cluster up  --public-hostname='192.168.116.129' --logging=true  --metrics=true --server-loglevel=0  --image-streams='centos7' --host-data-dir='/opt/ocp3.9/data'

Pulling image openshift/origin:v3.9.0
Pulled 1/4 layers, 26% complete
Pulled 1/4 layers, 32% complete
Pulled 1/4 layers, 38% complete
Pulled 1/4 layers, 45% complete
Pulled 1/4 layers, 51% complete
Pulled 2/4 layers, 61% complete
Pulled 2/4 layers, 66% complete
Pulled 2/4 layers, 71% complete
Pulled 3/4 layers, 81% complete
Pulled 3/4 layers, 85% complete
Pulled 3/4 layers, 89% complete
Pulled 3/4 layers, 93% complete
Pulled 3/4 layers, 97% complete
Pulled 4/4 layers, 100% complete
Extracting
Image pull complete
Using nsenter mounter for OpenShift volumes
Using public hostname IP 192.168.116.129 as the host IP
Using 192.168.116.129 as the server IP
Starting OpenShift using openshift/origin:v3.9.0 ...
OpenShift server started.

The server is accessible via web console at:
    https://192.168.116.129:8443

The metrics service is available at:
    https://hawkular-metrics-openshift-infra.192.168.116.129.nip.io/hawkular/metrics

The kibana logging UI is available at:
    https://kibana-logging.192.168.116.129.nip.io

You are logged in as:
    User:     developer
    Password: <any value>

To login as administrator:
    oc login -u system:admin

web登录用用户名和密码:

• admin admin
• developer developer