OpenShift 离线安装

离线安装 openshift 需要将安装过程中用的 rpm 包、docker image 以及 openshift-ansible 代码 在一台联网的机器上提前下载好。

本安装文档， 不包含 s2i 相关镜像和监控组件的离线安装。
本安装文档基于 RHEL 7.3，与 openshift 兼容的 docker rpm 包版本为 v1.9.1， 由于版本较老， api 与最新版本有出入，例如：不支持 digist 最为 tag。
如果使用 CentOS 则可安装最新版 docker。

联网设备下载所需软件

本节操作，需要在一台能联网的 RHEL7.3 系统（与安装 openshift 的目标机保持一致即可）上进行。

准备 RPM 包

搭建本地 YUM 源(假设 iso 挂载在 /mnt 目录)

cat > /etc/yum.repos.d/local.repo <<'eof'
[iso-repo]
name=Local iso repo
baseurl=file:///mnt/
enable=1
gpgcheck=0
eof

添加 openshift 相关 YUM 源

cat > /etc/yum.repos.d/openshift-ansible-centos-paas-sig.repo <<'eof'
[centos-openshift-origin]
name=CentOS OpenShift Origin
baseurl=http://mirror.centos.org/centos/7/paas/x86_64/openshift-origin/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/openshift-ansible-CentOS-SIG-PaaS

[centos-openshift-origin-testing]
name=CentOS OpenShift Origin Testing
baseurl=http://buildlogs.centos.org/centos/7/paas/x86_64/openshift-origin/
enabled=0
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/openshift-ansible-CentOS-SIG-PaaS

[centos-openshift-origin-debuginfo]
name=CentOS OpenShift Origin DebugInfo
baseurl=http://debuginfo.centos.org/centos/7/paas/x86_64/
enabled=0
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/openshift-ansible-CentOS-SIG-PaaS

[centos-openshift-origin-source]
name=CentOS OpenShift Origin Source
baseurl=http://vault.centos.org/centos/7/paas/Source/openshift-origin/
enabled=0
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/openshift-ansible-CentOS-SIG-PaaS
eof

添加 etcd 相关 YUM 源

cat > /etc/yum.repos.d/CentOS-Base.repo.repo <<'eof'
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
baseurl=http://mirror.centos.org/centos/7.3.1611/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
eof

通过 yum 命令安装相关软件包时，可以选择 “d”（只下载、不安装），或者使用 --downloadonly 参数来获取相关的 rpm 及其全部依赖。

master 节点涉及的包

  • origin-master-1.5.1-1.el7.x86_64
  • origin-1.5.1-1.el7.x86_64
  • origin-node-1.5.1-1.el7.x86_64
  • origin-sdn-ovs-1.5.1-1.el7.x86_64
  • origin-clients-1.5.1-1.el7.x86_64
  • tuned-profiles-origin-node-1.5.1-1.el7.x86_64

node 节点涉及的包

  • origin-clients-1.5.1-1.el7.x86_64
  • origin-1.5.1-1.el7.x86_64
  • origin-node-1.5.1-1.el7.x86_64
  • origin-sdn-ovs-1.5.1-1.el7.x86_64
  • tuned-profiles-origin-node-1.5.1-1.el7.x86_64

etcd 涉及的包

  • etcd-3.1.9-1.el7

其他

  • docker
  • iproute
  • python-dbus
  • python-six
  • PyYAML
  • yum-utils
  • ansible

下载 rpm 包

yum install --downloadonly PyYAML ansible docker etcd-3.1.9-1.el7 iproute origin-1.5.1-1.el7.x86_64 origin-1.5.1-1.el7.x86_64 origin-clients-1.5.1-1.el7.x86_64 origin-clients-1.5.1-1.el7.x86_64 origin-master-1.5.1-1.el7.x86_64 origin-node-1.5.1-1.el7.x86_64 origin-node-1.5.1-1.el7.x86_64 origin-sdn-ovs-1.5.1-1.el7.x86_64 origin-sdn-ovs-1.5.1-1.el7.x86_64 python-dbus python-six tuned-profiles-origin-node-1.5.1-1.el7.x86_64 tuned-profiles-origin-node-1.5.1-1.el7.x86_64 yum-utils

下载的 rpm 位于/var/cache/yum/，可以使用如下命令，将 rpm 拷出备用：

mkdir rpms
find /var/cache/yum/ -iname '*.rpm' -exec cp {} rpms/ \;

位于本地 YUM 源中的 rpm 不会被下载，所以在安装 openshift 的目标机器上也需要搭建本地 YUM 源。

准备 docker images

安装 docker

yum install -y docker

安装过程涉及的 docker 镜像

  • docker.io/busybox:latest
  • docker.io/openshift/origin-haproxy-router:v1.5.1
  • docker.io/openshift/origin-deployer:v1.5.1
  • docker.io/openshift/origin-sti-builder:v1.5.1
  • docker.io/openshift/origin-pod:v1.5.1
  • docker.io/openshift/origin-docker-registry:v1.5.1
  • docker.io/cockpit/kubernetes:latest
  • docker.io/openshift/origin-metrics-cassandra:latest
  • docker.io/openshift/origin-metrics-hawkular-metrics:latest
  • docker.io/openshift/origin-metrics-heapster:latest

拉取镜像

 docker pull docker.io/busybox:latest docker.io/openshift/origin-haproxy-router:v1.5.1 docker.io/openshift/origin-deployer:v1.5.1 docker.io/openshift/origin-sti-builder:v1.5.1 docker.io/openshift/origin-pod:v1.5.1 docker.io/openshift/origin-docker-registry:v1.5.1 docker.io/cockpit/kubernetes:latest docker.io/openshift/origin-metrics-cassandra:latest docker.io/openshift/origin-metrics-hawkular-metrics:latest docker.io/openshift/origin-metrics-heapster:latest

将镜像导出为 tar 包

docker save -o oso1.5.1-images.tar docker.io/busybox:latest docker.io/openshift/origin-haproxy-router:v1.5.1 docker.io/openshift/origin-deployer:v1.5.1 docker.io/openshift/origin-sti-builder:v1.5.1 docker.io/openshift/origin-pod:v1.5.1 docker.io/openshift/origin-docker-registry:v1.5.1 docker.io/cockpit/kubernetes:latest docker.io/openshift/origin-metrics-cassandra:latest docker.io/openshift/origin-metrics-hawkular-metrics:latest docker.io/openshift/origin-metrics-heapster:latest

拉取 playbook 代码

git clone https://github.com/openshift/openshift-ansible

离线设备安装

将准备好的 rpm 包、镜像导出的 tar 包、playbook 代码 拷贝到所有目标机器。
本节相关操作，在需要安装 openshift 的设备上执行（离线环境）
本文档，以两节点 openshift 安装为示例。

安装 rpm

使用操作系统镜像，搭建本地 YUM 源

mount /dev/sr0 /mnt/

cat > /etc/yum.repos.d/local.repo <<'eof'
[iso-repo]
name=Local iso repo
baseurl=file:///mnt/
enable=1
gpgcheck=0
eof

安装 rpm 包

cd rpms
yum install ./*.rpm

删除 rpm 安装后生成的配置文件

 rm -rf /etc/origin/*

导入 docker 镜像

docker load -i ose3-images.tar

准备 playbook 代码

OpenShift-ansible 需要切换至于安装的 OpenShift 对应的版本，OpenShift v1.5.1 对应 OpenShift-ansible v3.5.1

cd openshift-ansible
git checkout openshift-ansible-3.5.1-1

注释掉< openshift-ansible home >/roles/openshift_repos/tasks/main.yaml 文件中的 “Configure origin yum repositories RHEL/CentOS” task，禁止生成 openshift yum repo 文件

[root@master openshift-ansible]# cat roles/openshift_repos/tasks/main.yaml
---
# TODO: Add flag for enabling EPEL repo, default to false

# TODO: Add subscription-management config, with parameters
#       for username, password, poolid(name), and official repos to
#       enable/disable. Might need to make a module that extends the
#       subscription management module to take a poolid and enable/disable the
#       proper repos correctly.

- assert:
    that: openshift_deployment_type in known_openshift_deployment_types
  when: not openshift.common.is_containerized | bool

- name: Ensure libselinux-python is installed
  package: name=libselinux-python state=present
  when: not openshift.common.is_containerized | bool

- name: Create any additional repos that are defined
  template:
    src: yum_repo.j2
    dest: /etc/yum.repos.d/openshift_additional.repo
  when: openshift_additional_repos | length > 0 and not openshift.common.is_containerized | bool
  notify: refresh cache

- name: Remove the additional repos if no longer defined
  file:
    dest: /etc/yum.repos.d/openshift_additional.repo
    state: absent
  when: openshift_additional_repos | length == 0 and not openshift.common.is_containerized | bool
  notify: refresh cache

- name: Configure origin gpg keys if needed
  copy:
    src: origin/gpg_keys/openshift-ansible-CentOS-SIG-PaaS
    dest: /etc/pki/rpm-gpg/
  notify: refresh cache
  when: ansible_os_family == "RedHat" and ansible_distribution != "Fedora"
        and openshift_deployment_type == 'origin'
        and not openshift.common.is_containerized | bool
        and openshift_enable_origin_repo | default(true) | bool

#- name: Configure origin yum repositories RHEL/CentOS
#  copy:
#    src: origin/repos/openshift-ansible-centos-paas-sig.repo
#    dest: /etc/yum.repos.d/
#  notify: refresh cache
#  when: ansible_os_family == "RedHat" and ansible_distribution != "Fedora"
#        and openshift_deployment_type == 'origin'
#        and not openshift.common.is_containerized | bool
#        and openshift_enable_origin_repo | default(true) | bool

其他配置

在 /etc/hosts 中添加相关机器的域名解析

192.168.12.170 master.openshift.blabla.local
192.168.12.171 node.openshift.blabla.local

配置 ssh 无密码登录

ssh-keygen
ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.12.170
ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.12.171

安装 openshift

本小结操作，在 master 节点进行

在 /etc/ansible/hosts 中配置节点信息

# Create an OSEv3 group that contains the masters, nodes, and etcd groups
[OSEv3:children]
masters
nodes
etcd
 
# Set variables common for all OSEv3 hosts
[OSEv3:vars]
ansible_ssh_user=root
deployment_type=origin

[masters]
master.openshift.blabla.local
 
# host group for etcd
[etcd]
node.openshift.blabla.local
 
# host group for nodes, includes region info
[nodes]
master.openshift.blabla.local openshift_node_labels="{'region': 'infra', 'zone': 'default'}"
node.openshift.blabla.local openshift_node_labels="{'region': 'primary', 'zone': 'west'}"

ansible ping测试：

[root@master ~]#  ansible all -m ping
master.openshift.blabla.local | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}
node02.openshift.blabla.local | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}

安装

ansible-playbook playbooks/byo/config.yml

执行 ansible-playbook 之前，务必确认各节点主机名是否正确

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