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Openshift 4.4 静态 IP 离线安装系列：准备离线资源

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08/12
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本系列文章描述了离线环境下以 UPI (User Provisioned Infrastructure) 模式安装 Openshift Container Platform (OCP) 4.4.5 的步骤，我的环境是 VMware ESXI 虚拟化，也适用于其他方式提供的虚拟机或物理主机。离线资源包括安装镜像、所有样例 Image Stream 和 OperatorHub 中的所有 RedHat Operators。

本系列采用静态 IP 的方式安装 OCP 集群，如果你可以随意分配网络，建议采用 DHCP 的方式。

1. 离线环境

单独准备一台节点用来执行安装任务和离线资源准备，这台节点最好具备魔法上网的能力，以便可以同时访问内外网，我们称这台节点为基础节点。

除此之外还需要部署一个私有镜像仓库，以供 OCP 安装和运行时使用，要求支持 version 2 schema 2 (manifest list)，我这里选择的是 Quay 3.3。镜像仓库需要部署在另外一台节点，因为需要用到 443 端口，与后面的负载均衡端口冲突。

很多人误以为必须联系 Red Hat 销售，签单之后才能使用 OCP4，其实不然，注册一个开发者账号后就可以获得 quay.io 和 registry.redhat.io 的拉取密钥了。

2. 准备离线安装介质

获取版本信息

目前最新的 OCP 版本是 4.4.5，可以从这里下载客户端：

  • https://mirror.openshift.com/pub/openshift-v4/clients/ocp/latest-4.4/

解压出来的二进制文件放到基础节点的 $PATH 下，看下版本信息：

→ oc adm release info quay.io/openshift-release-dev/ocp-release:4.4.5-x86_64Name: 4.4.5
Digest: sha256:4a461dc23a9d323c8bd7a8631bed078a9e5eec690ce073f78b645c83fb4cdf74
Created: 2020-05-21T16:03:01Z
OS/Arch: linux/amd64
Manifests: 412Pull From: quay.io/openshift-release-dev/ocp-release@sha256:4a461dc23a9d323c8bd7a8631bed078a9e5eec690ce073f78b645c83fb4cdf74Release Metadata:
Version: 4.4.5
Upgrades: 4.3.18, 4.3.19, 4.3.21, 4.3.22, 4.4.2, 4.4.3, 4.4.4
Metadata:
description:
Metadata:
url: https://access.redhat.com/errata/RHBA-2020:2180Component Versions:
kubernetes 1.17.1
machine-os 44.81.202005180831-0 Red Hat Enterprise Linux CoreOSImages:
NAME DIGEST
aws-machine-controllers sha256:7817d9e707bb51bc1e5110ef66bb67947df42dcf3c9b782a8f12f60b8f229dca
azure-machine-controllers sha256:5e2320f92b7308a4f1ec4aca151c752f69265e8c5b705d78e2f2ee70d717711a
baremetal-installer sha256:4c8c6d2895e065711cfcbffe7e8679d9890480a4975cad683b643d8502375fe3
baremetal-machine-controllers sha256:5f1b312ac47b7f9e91950463e9a4ce5af7094a3a8b0bc064c9b4dcfc9c725ad5
baremetal-operator sha256:a77ff02f349d96567da8e06018ad0dfbfb5fef6600a9a216ade15fadc574f4b4
baremetal-runtimecfg sha256:715bc48eda04afc06827189883451958d8940ed8ab6dd491f602611fe98a6fba
cli sha256:43159f5486cc113d64d5ba04d781c16a084d18745a911a5ae7200bb895778a72
cli-artifacts sha256:ce7130db82f5a3bb2c806d7080f356e4c68c0405bf3956d3e290bc2078a8bf32
cloud-credential-operator sha256:244ab9d0fcf7315eb5c399bd3fa7c2e662cf23f87f625757b13f415d484621c3
cluster-authentication-operator sha256:3145e4fbd62dde385fd0e33d220c42ec3d00ac1dab72288e584cc502b4b8b6db
cluster-autoscaler sha256:66e47de69f685f2dd063fbce9f4e5a00264a5572140d255f2db4c367cb00bad9
cluster-autoscaler-operator sha256:6a32eafdbea3d12c0681a1a1660c7a424f7082a1c42e22d1b301ab0ab6da191b
cluster-bootstrap sha256:fbde2b1a3df7172ce5dbc5e8818bfe631718399eda8058b301a1ef059f549e95
cluster-config-operator sha256:5437794d2309ebe65ca08d1bdeb9fcd665732207b3287df8a7c56e5a2813eccb
cluster-csi-snapshot-controller-operator sha256:bc4d8ad97b473316518dbd8906dd900feba383425671eb7d4d73ed1d705c105e
cluster-dns-operator sha256:1a7469258e351d2d56a98a5ef4a3dfa0326b4677fdc1dd11279b6a193ccdbad1
cluster-etcd-operator sha256:9f7a02df3a5d91326d95e444e2e249f8205632ae986d6dccc7f007ec65c8af77
cluster-image-registry-operator sha256:0aaa817389487d266faf89cecbfd3197405d87172ee2dcda169dfa90e2e9ca18
cluster-ingress-operator sha256:4887544363e052e656aa1fd44d2844226ee2e4617e08b88ba0211a93bb3101fa
cluster-kube-apiserver-operator sha256:718ca346d5499cccb4de98c1f858c9a9a13bbf429624226f466c3ee2c14ebf40
cluster-kube-controller-manager-operator sha256:0aa16b4ff32fbb9bc7b32aa1bf6441a19a1deb775fb203f21bb8792ff1a26c2e
cluster-kube-scheduler-operator sha256:887eda5ce495f1a33c5adbba8772064d3a8b78192162e4c75bd84763c5a1fb01
cluster-kube-storage-version-migrator-operator sha256:0fd3e25304a6e23e9699172a84dc134b9b5b81dd89496322a9f46f4cd82ecf71
cluster-machine-approver sha256:c35b382d426ff03cfe07719f19e871ec3bd4189fa27452b3e2eb2fb4ab085afc
cluster-monitoring-operator sha256:d7d5f3b6094c88cb1aa9d5bf1b29c574f13db7142e0a9fba03c6681fe4b592a5
cluster-network-operator sha256:563018341e5b37e5cf370ee0a112aa85dd5e17a658b303714252cc59ddfadea5
cluster-node-tuned sha256:0d1a3f66cd7cfc889ddf17cbdb4cb2e4b9188c341b165de1c9c1df578fb53212
cluster-node-tuning-operator sha256:8e00331fd6b725b1d44687bafa2186920e2864fd4d04869ad4e9f5ba56d663ca
cluster-openshift-apiserver-operator sha256:087dd3801b15ca614be0998615a0d827383e9c9ab39e64107324074bddccfff8
cluster-openshift-controller-manager-operator sha256:a25afbcb148f3535372784e82c66a6cc2843fe9e7119b9198a39422edb95c2ae
cluster-policy-controller sha256:6294d4af2061d23f52a2a439d20272280aa6e5fcff7a5559b4797fb8e6536790
cluster-samples-operator sha256:7040633af70ceb19147687d948a389d392945cb57236165409e66e5101c0d0c0
cluster-storage-operator sha256:bcfeab624513563c9e26629be2914770436c49318c321bd99028a7d1ffab30cf
cluster-svcat-apiserver-operator sha256:21a562f26c967ad6d83e1f4219fad858154c3df9854f1462331b244906c6ca9c
cluster-svcat-controller-manager-operator sha256:b635529e5843996a51ace6a2aea4854e46256669ef1773c7371e4f0407dbf843
cluster-update-keys sha256:828e11d8132caf5533e18b8e5d292d56ccf52b08e4fe4c53d7825404b05b2844
cluster-version-operator sha256:7a2a210bc07fead80b3f4276cf14692c39a70640a124326ee919d415f0dc5b2c
configmap-reloader sha256:07d46699cb9810e3f629b5142a571db83106aa1190d5177a9944272080cd053d
console sha256:69f14151fe8681e5fa48912f8f4df753a0dcc3d616ad7991c463402517d1eab4
console-operator sha256:85c9a48c9b1896f36cf061bd4890e7f85e0dc383148f2a1dc498e668dee961df
container-networking-plugins sha256:1a2ecb28b80800c327ad79fb4c8fb6cc9f0b434fc42a4de5b663b907852ee9fb
coredns sha256:b25b8b2219e8c247c088af93e833c9ac390bc63459955e131d89b77c485d144d
csi-snapshot-controller sha256:33f89dbd081d119aac8d7c56abcb060906b23d31bc801091b789dea14190493f
deployer sha256:b24cd515360ae4eba89d4d92afe2689a84043106f7defe34df28acf252cd45b4
docker-builder sha256:d3cf4e3ad3c3ce4bef52d9543c87a1c555861b726ac9cae0cc57486be1095f8a
docker-registry sha256:8b6ab4a0c14118020fa56b70cab440883045003a8d9304c96691a0401ad7117c
etcd sha256:aba3c59eb6d088d61b268f83b034230b3396ce67da4f6f6d49201e55efebc6b2
gcp-machine-controllers sha256:1c67b5186bbbdc6f424d611eeff83f11e1985847f4a98f82642dcd0938757b0e
grafana sha256:aa5c9d3d828b04418d17a4bc3a37043413bdd7c036a75c41cd5f57d8db8aa25a
haproxy-router sha256:7064737dd9d0a43de7a87a094487ab4d7b9e666675c53cf4806d1c9279bd6c2e
hyperkube sha256:187b9d29fea1bde9f1785584b4a7bbf9a0b9f93e1323d92d138e61c861b6286c
insights-operator sha256:51dc869dc1a105165543d12eeee8229916fc15387210edc6702dbc944f7cedd7
installer sha256:a0f23a3292a23257a16189bdae75f7b5413364799e67a480dfad086737e248e0
installer-artifacts sha256:afe926af218d506a7f64ef3df0d949aa6653a311a320bc833398512d1f000645
ironic sha256:80087bd97c28c69fc08cd291f6115b0e12698abf2e87a3d2bbe0e64f600bae93
ironic-hardware-inventory-recorder sha256:2336af8eb4949ec283dc22865637e3fec80a4f6b1d3b78178d58ea05afbd49c2
ironic-inspector sha256:1f48cc344aab15c107e2fb381f9825613f586e116c218cdaf18d1e67b13e2252
ironic-ipa-downloader sha256:a417b910e06ad030b480988d6864367c604027d6476e02e0c3d5dcd6f6ab4ccb
ironic-machine-os-downloader sha256:10b751d8e4ba2975dabc256c7ac4dcf94f4de99be35242505bf8db922e968403
ironic-static-ip-manager sha256:0c122317e3a6407a56a16067d518c18ce08f883883745b2e11a5a39ff695d3d0
jenkins sha256:d4ab77a119479a95a33beac0d94980a7a0a87cf792f5850b30dff4f1f90a9c4d
jenkins-agent-maven sha256:10559ec206191a9931b1044260007fe8dcedacb8b171be737dfb1ccca9bbf0f5
jenkins-agent-nodejs sha256:ad9e83ea1ea3f338af4dbc9461f8b243bd817df722909293fde33b4f9cbab2bc
k8s-prometheus-adapter sha256:be548d31a65e56234e4b98d6541a14936bc0135875ec61e068578f7014aac31e
keepalived-ipfailover sha256:a882a11b55b2fc41b538b59bf5db8e4cfc47c537890e4906fe6bf22f9da75575
kube-client-agent sha256:8eb481214103d8e0b5fe982ffd682f838b969c8ff7d4f3ed4f83d4a444fb841b
kube-etcd-signer-server sha256:8468b1c575906ed41aa7c3ac3b0a440bf3bc254d2975ecc5e23f84aa54395c81
kube-proxy sha256:886ae5bd5777773c7ef2fc76f1100cc8f592653ce46f73b816de80a20a113769
kube-rbac-proxy sha256:f6351c3aa750fea93050673f66c5ddaaf9e1db241c7ebe31f555e011b20d8c30
kube-state-metrics sha256:ca47160369e67e1d502e93175f6360645ae02933cceddadedabe53cd874f0f89
kube-storage-version-migrator sha256:319e88c22ea618e7b013166eace41c52eb70c8ad950868205f52385f09e96023
kuryr-cni sha256:3eecf00fdfca50e90ba2d659bd765eb04b5c446579e121656badcfd41da87663
kuryr-controller sha256:7d70c92699a69a589a3c2e1045a16855ba02af39ce09d6a6df9b1dbabacff4f5
libvirt-machine-controllers sha256:cc3c7778de8d9e8e4ed543655392f942d871317f4b3b7ed31208312b4cc2e61f
local-storage-static-provisioner sha256:a7ff3ec289d426c7aaee35a459ef8c862b744d709099dedcd98a4579136f7d47
machine-api-operator sha256:4ca2f1b93ad00364c053592aea0992bbb3cb4b2ea2f7d1d1af286c26659c11d3
machine-config-operator sha256:31dfdca3584982ed5a82d3017322b7d65a491ab25080c427f3f07d9ce93c52e2
machine-os-content sha256:b397960b7cc14c2e2603111b7385c6e8e4b0f683f9873cd9252a789175e5c4e1
mdns-publisher sha256:dea1fcb456eae4aabdf5d2d5c537a968a2dafc3da52fe20e8d99a176fccaabce
multus-admission-controller sha256:377ed5566c062bd2a677ddc0c962924c81796f8d45346b2eefedf5350d7de6b3
multus-cni sha256:bc58468a736e75083e0771d88095229bdd6c1e58db8aa33ef60b326e0bfaf271
multus-route-override-cni sha256:e078599fde3b974832c06312973fae7ed93334ea30247b11b9f1861e2b0da7d6
multus-whereabouts-ipam-cni sha256:89c386f5c3940d88d9bc2520f422a2983514f928585a51ae376c43f19e5a6cad
must-gather sha256:a295d2568410a45f1ab403173ee84d7012bb3ec010c24aa0a17925d08d726e20
oauth-proxy sha256:619bdb128e410b52451dbf79c9efb089e138127812da19a1f69907117480827f
oauth-server sha256:58545567c899686cae51d2de4e53a5d49323183a7a3065c0b96ad674686acbe8
openshift-apiserver sha256:8fd79797e6e0e9337fc9689863c3817540a003685a6dfc2a55ecb77059967cef
openshift-controller-manager sha256:4485d6eb7625becf581473690858a01ab83244ecb03bb0319bf849068e98a86a
openshift-state-metrics sha256:6de02ce03089b715e9f767142de33f006809226f037fe21544e1f79755ade920
openstack-machine-controllers sha256:d61e611416196650c81174967e5f11cbdc051d696e38ba341de169375d985709
operator-lifecycle-manager sha256:6e1bca545c35fb7ae4d0f57006acce9a9fabce792c4026944da68d7ddfdec244
operator-marketplace sha256:f0750960873a7cc96f7106e20ea260dd41c09b8a30ce714092d3dcd8a7ec396d
operator-registry sha256:7914f42c9274d263c6ba8623db8e6af4940753dcb4160deb291a9cbc61487414
ovirt-machine-controllers sha256:44f9e65ccd39858bf3d7aa2929f5feac634407e36f912ca88585b445d161506c
ovn-kubernetes sha256:d80899ed1a6a9f99eb8c64856cd4e576f6534b7390777f3180afb8a634743d62
pod sha256:d7862a735f492a18cb127742b5c2252281aa8f3bd92189176dd46ae9620ee68a
prom-label-proxy sha256:1cf614e8acbe3bcca3978a07489cd47627f3a3bd132a5c2fe0072d9e3e797210
prometheus sha256:5eea86e59ffb32fca37cacff22ad00838ea6b947272138f8a56062f68ec40c28
prometheus-alertmanager sha256:bb710e91873ad50ac10c2821b2a28c29e5b89b5da7740a920235ecc33fb063f5
prometheus-config-reloader sha256:7cadb408d7c78440ddacf2770028ee0389b6840651c753f4b24032548f56b7aa
prometheus-node-exporter sha256:7d4e76fea0786f4025e37b5ad0fb30498db5586183fc560554626e91066f60f3
prometheus-operator sha256:6e599a9a8691cce0b40bf1ac5373ddb8009113a2115b5617b2d3a3996174c8f7
sdn sha256:08c256b7b07c57f195faa33ea4273694dd3504d4a85a10dbf7616b91eaa8e661
service-ca-operator sha256:8c9a3071040f956cce15d1e6da70f6f47dc55b609e4f19fe469ce581cd42bfe5
service-catalog sha256:d9a5fbf60e3bbf1c9811e1707ce9bd04e8263552ba3a6bea8f8c7b604808fdf9
telemeter sha256:19cfc3e37e12d9dd4e4dd9307781368bbeb07929b6ab788e99aa5543badee3c9
tests sha256:fc56c9805e2e4a8416c1c5433d7974148f0bad88be4a62feeedcd5d9db4b6ad6
thanos sha256:a4ea116aec2f972991f5a22f39aa1dbc567dddc3429ddca873601714d003a51c

创建内部镜像仓库

内部镜像仓库用于存放部署 OCP 集群所需的镜像，仓库本身使用 Quay 部署。Quay 包含了几个核心组件：

  • 数据库 : 主要存放镜像仓库的元数据（非镜像存储)
  • Redis : 存放构建日志和Quay的向导
  • Quay : 作为镜像仓库
  • Clair : 提供镜像扫描功能

首先修改镜像仓库节点的主机名：

$ hostnamectl set-hostname registry.openshift4.example.com

所有节点主机名都要采用三级域名格式，如 master1.aa.bb.com。

接着安装 podman：

$ yum install -y podman

先创建一个 Pod，用来共享 Network Namespace：

→ podman pod create --name quay -p 443:8443

安装 Mysql 数据库：

$ mkdir -p /data/quay/lib/mysql
$ chmod 777 /data/quay/lib/mysql
$ export MYSQL_CONTAINER_NAME=quay-mysql
$ export MYSQL_DATABASE=enterpriseregistrydb
$ export MYSQL_PASSWORD=<PASSWD>
$ export MYSQL_USER=quayuser
$ export MYSQL_ROOT_PASSWORD=<PASSWD>
$ podman run \
--detach \
--restart=always \
--env MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD} \
--env MYSQL_USER=${MYSQL_USER} \
--env MYSQL_PASSWORD=${MYSQL_PASSWORD} \
--env MYSQL_DATABASE=${MYSQL_DATABASE} \
--name ${MYSQL_CONTAINER_NAME} \
--privileged=true \
--pod quay \
-v /data/quay/lib/mysql:/var/lib/mysql/data:Z \
registry.access.redhat.com/rhscl/mysql-57-rhel7

安装 Redis：

$ mkdir -p /data/quay/lib/redis
$ chmod 777 /data/quay/lib/redis
$ podman run -d --restart=always \
--pod quay \
--privileged=true \
--name quay-redis \
-v /data/quay/lib/redis:/var/lib/redis/data:Z \
registry.access.redhat.com/rhscl/redis-32-rhel7

获取 Red Hat Quay v3 镜像的访问权：

$ podman login -u="redhat+quay" -p="O81WSHRSJR14UAZBK54GQHJS0P1V4CLWAJV1X2C4SD7KO59CQ9N3RE12612XU1HR" quay.io

参考：https://access.redhat.com/solutions/3533201

配置 Quay：

$ podman run --privileged=true \
--name quay-config \
--pod quay \
--add-host mysql:127.0.0.1 \
--add-host redis:127.0.0.1 \
--add-host clair:127.0.0.1 \
-d quay.io/redhat/quay:v3.3.0 config fuckcloudnative.io

这一步会启动一个配置 Quay 的进程，打开浏览器访问：https://registry.openshift4.example.com，用户名/密码为：quayconfig/fuckcloudnative.io：

选择新建配置，然后设置数据库：

设置超级管理员：

下一个界面要设置两个地方，一个是 Server configuration 的 Server Hostname，另一个是 Redis Hostname，SSL 不用设置，后面直接通过命令行配置：

配置检查通过后，就可以保存下载下来：

最后会导出一个 quay-config.tar.gz，将其上传到 Quay 所在的服务器，解压到配置文件目录：

$ mkdir -p /data/quay/config
$ mkdir -p /data/quay/storage
$ cp quay-config.tar.gz /data/quay/config/
$ cd /data/quay/config/
$ tar zxvf quay-config.tar.gz

生成自签名证书：

# 生成私钥
$ openssl genrsa -out ssl.key 1024

根据私钥生成证书申请文件 csr：

$ openssl req -new -key ssl.key -out ssl.csr

这里根据命令行向导来进行信息输入：

Common Name 可以输入：*.yourdomain.com，这种方式可以生成通配符域名证书。

使用私钥对证书申请进行签名从而生成证书：

$ openssl x509 -req -in ssl.csr -out ssl.cert -signkey ssl.key -days 3650

这样就生成了有效期为 10 年的证书文件，对于自己内网服务使用足够。

或者你也可以一步到位：

$ openssl req \
-newkey rsa:2048 -nodes -keyout ssl.key \
-x509 -days 3650 -out ssl.cert -subj \
"/C=CN/ST=Shanghai/L=Shanghai/O=IBM/OU=IBM/CN=*.openshift4.example.com"

证书搞定了之后，还需要修改 config.yaml，将协议修改为 https：

PREFERRED_URL_SCHEME: https

然后停止 quay-config：

$ podman stop quay-config

最后一步才是部署 Quay：

$ podman run --restart=always \
--sysctl net.core.somaxconn=4096 \
--privileged=true \
--name quay-master \
--pod quay \
--add-host mysql:127.0.0.1 \
--add-host redis:127.0.0.1 \
--add-host clair:127.0.0.1 \
-v /data/quay/config:/conf/stack:Z \
-v /data/quay/storage:/datastorage:Z \
-d quay.io/redhat/quay:v3.3.0

安装成功后，将自签名的证书复制到默认信任证书路径：

$ cp ssl.cert /etc/pki/ca-trust/source/anchors/ssl.crt
$ update-ca-trust extract

现在可以通过 podman login 命令来测试仓库的连通性，看到如下字样即表示安装成功（也可以通过浏览器访问 Web UI）：

→ podman login registry.openshift4.example.com
Username: admin
Password: ********Login Succeeded

如果使用 Docker 登录，需要将证书复制到 docker 的信任证书路径：

$ mkdir -p /etc/docker/certs.d/registry.openshift4.example.com
$ cp ssl.cert /etc/docker/certs.d/registry.openshift4.example.com/ssl.crt
$ systemctl restart docker

下载镜像文件

准备拉取镜像权限认证文件。 从 Red Hat OpenShift Cluster Manager 站点的 Pull Secret 页面下载 registry.redhat.io 的 pull secret。

# 把下载的 txt 文件转出 json 格式，如果没有 jq 命令，通过 epel 源安装
$ cat ./pull-secret.txt | jq . > pull-secret.json$ yum install epel-release
$ yum install jq

JSON 内容如下：

{
"auths": {
"cloud.openshift.com": {
"auth": "b3BlbnNo...",
"email": "you@example.com"
},
"quay.io": {
"auth": "b3BlbnNo...",
"email": "you@example.com"
},
"registry.connect.redhat.com": {
"auth": "NTE3Njg5Nj...",
"email": "you@example.com"
},
"registry.redhat.io": {
"auth": "NTE3Njg5Nj...",
"email": "you@example.com"
}
}
}

把本地仓库的用户密码转换成 base64 编码：

$ echo -n 'admin:password' | base64 -w0
cm9vdDpwYXNzd29yZA==

然后在 pull-secret.json 里面加一段本地仓库的权限。第一行仓库域名和端口，第二行是上面的 base64，第三行随便填个邮箱：

"auths": {
...
"registry.openshift4.example.com": {
"auth": "cm9vdDpwYXNzd29yZA==",
"email": "you@example.com"
},
...

设置环境变量：

$ export OCP_RELEASE="4.4.5-x86_64"
$ export LOCAL_REGISTRY='registry.openshift4.example.com'
$ export LOCAL_REPOSITORY='ocp4/openshift4'
$ export PRODUCT_REPO='openshift-release-dev'
$ export LOCAL_SECRET_JSON='/root/pull-secret.json'
$ export RELEASE_NAME="ocp-release"

  • OCP_RELEASE : OCP 版本，可以在这个页面查看。如果版本不对，下面执行 oc adm 时会提示 image does not exist。
  • LOCAL_REGISTRY : 本地仓库的域名和端口。
  • LOCAL_REPOSITORY : 镜像存储库名称，使用 ocp4/openshift4。
  • PRODUCT_REPO 和 RELEASE_NAME 都不需要改，这些都是一些版本特征，保持不变即可。
  • LOCAL_SECRET_JSON : 密钥路径，就是上面 pull-secret.json 的存放路径。

在 Quay 中创建一个组织（Organization）ocp4 用来存放同步过来的镜像。

最后一步就是同步镜像，这一步的动作就是把 quay 官方仓库中的镜像同步到本地仓库，如果失败了可以重新执行命令，整体内容大概 5G。

$ oc adm -a ${LOCAL_SECRET_JSON} release mirror \
--from=quay.io/${PRODUCT_REPO}/${RELEASE_NAME}:${OCP_RELEASE} \
--to=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY} \
--to-release-image=${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}

oc adm release mirror 命令执行完成后会输出下面类似的信息，保存下来，将来会用在 install-config.yaml 文件中：

imageContentSources:
- mirrors:
- registry.openshift4.example.com/ocp4/openshift4
source: quay.io/openshift-release-dev/ocp-release
- mirrors:
- registry.openshift4.example.com/ocp4/openshift4
source: quay.io/openshift-release-dev/ocp-v4.0-art-dev

本地镜像仓库缓存好镜像之后，通过 tag/list 接口查看所有 tag，如果能列出来一堆就说明是正常的：

$ curl -s -X GET -H "Authorization: Bearer <token>" https://registry.openshift4.example.com/api/v1/repository/ocp4/openshift4/tag/|jq .{
"has_additional": true,
"page": 1,
"tags": [
{
"name": "4.4.5-cluster-kube-scheduler-operator",
"reversion": false,
"start_ts": 1590821178,
"image_id": "a778898a93d4fc5413abea38aa604d14d7efbd99ee1ea75d2d1bea3c27a05859",
"last_modified": "Sat, 30 May 2020 06:46:18 -0000",
"manifest_digest": "sha256:887eda5ce495f1a33c5adbba8772064d3a8b78192162e4c75bd84763c5a1fb01",
"docker_image_id": "a778898a93d4fc5413abea38aa604d14d7efbd99ee1ea75d2d1bea3c27a05859",
"is_manifest_list": false,
"size": 103582366
},
{
"name": "4.4.5-kube-rbac-proxy",
"reversion": false,
"start_ts": 1590821178,
"image_id": "f1714cda6028bd7998fbba1eb79348f33b9ed9ccb0a69388da2eb0aefc222f85",
"last_modified": "Sat, 30 May 2020 06:46:18 -0000",
"manifest_digest": "sha256:f6351c3aa750fea93050673f66c5ddaaf9e1db241c7ebe31f555e011b20d8c30",
"docker_image_id": "f1714cda6028bd7998fbba1eb79348f33b9ed9ccb0a69388da2eb0aefc222f85",
"is_manifest_list": false,
"size": 102366055
},
{
"name": "4.4.5-cluster-kube-controller-manager-operator",
"reversion": false,
"start_ts": 1590821178,
"image_id": "bc7e19d35ec08c1a93058db1705998da2f8bbe5cdbb7f3f5974e6176e2f79eb6",
"last_modified": "Sat, 30 May 2020 06:46:18 -0000",
"manifest_digest": "sha256:0aa16b4ff32fbb9bc7b32aa1bf6441a19a1deb775fb203f21bb8792ff1a26c2e",
"docker_image_id": "bc7e19d35ec08c1a93058db1705998da2f8bbe5cdbb7f3f5974e6176e2f79eb6",
"is_manifest_list": false,
"size": 104264263
},
{
"name": "4.4.5-baremetal-operator",
"reversion": false,
"start_ts": 1590821178,
"image_id": "6ec90c0fb53125801d41b37f8f28c4679e49ce19427f7848803a2bc397e4c23b",
"last_modified": "Sat, 30 May 2020 06:46:18 -0000",
"manifest_digest": "sha256:a77ff02f349d96567da8e06018ad0dfbfb5fef6600a9a216ade15fadc574f4b4",
"docker_image_id": "6ec90c0fb53125801d41b37f8f28c4679e49ce19427f7848803a2bc397e4c23b",
"is_manifest_list": false,
"size": 110117444
},
{
"name": "4.4.5-cluster-etcd-operator",
"reversion": false,
"start_ts": 1590821178,
"image_id": "d0cf3539496e075954e53fce5ed56445ae87f9f32cfb41e9352a23af4aa04d69",
"last_modified": "Sat, 30 May 2020 06:46:18 -0000",
"manifest_digest": "sha256:9f7a02df3a5d91326d95e444e2e249f8205632ae986d6dccc7f007ec65c8af77",
"docker_image_id": "d0cf3539496e075954e53fce5ed56445ae87f9f32cfb41e9352a23af4aa04d69",
"is_manifest_list": false,
"size": 103890103
},
{
"name": "4.4.5-openshift-apiserver",
"reversion": false,
"start_ts": 1590821177,
"image_id": "eba5a051dcbab534228728c7295d31edc0323c7930fa44b40059cf8d22948363",
"last_modified": "Sat, 30 May 2020 06:46:17 -0000",
"manifest_digest": "sha256:8fd79797e6e0e9337fc9689863c3817540a003685a6dfc2a55ecb77059967cef",
"docker_image_id": "eba5a051dcbab534228728c7295d31edc0323c7930fa44b40059cf8d22948363",
"is_manifest_list": false,
"size": 109243025
},
{
"name": "4.4.5-kube-client-agent",
"reversion": false,
"start_ts": 1590821177,
"image_id": "fc1fdfb96e9cd250024094b15efa79344c955c7d0c93253df312ffdae02b5524",
"last_modified": "Sat, 30 May 2020 06:46:17 -0000",
"manifest_digest": "sha256:8eb481214103d8e0b5fe982ffd682f838b969c8ff7d4f3ed4f83d4a444fb841b",
"docker_image_id": "fc1fdfb96e9cd250024094b15efa79344c955c7d0c93253df312ffdae02b5524",
"is_manifest_list": false,
"size": 99721802
},
{
"name": "4.4.5-kube-proxy",
"reversion": false,
"start_ts": 1590821177,
"image_id": "d2577f4816cb81444ef3b441bf9769904c602cd6626982c2fd8ebba162fd0c08",
"last_modified": "Sat, 30 May 2020 06:46:17 -0000",
"manifest_digest": "sha256:886ae5bd5777773c7ef2fc76f1100cc8f592653ce46f73b816de80a20a113769",
"docker_image_id": "d2577f4816cb81444ef3b441bf9769904c602cd6626982c2fd8ebba162fd0c08",
"is_manifest_list": false,
"size": 103473573
},
...
}

这里需要创建一个 OAuth access token 来访问 Quay 的 API，创建过程如下：

  1. 浏览器登录 Red Hat Quay，选择一个组织（Organization），例如 ocp4。
  2. 在左侧导航中选择 Applications 图标。
  3. 选择 Create New Application，输入 Application 的名字然后回车。
  4. 选择你新创建的 Application，在左侧导航栏中选择 Generate Token。
  5. 选择相应的权限，然后点击 Generate Access Token。
  6. 再次确认你设置的权限，然后点击 Authorize Application。
  7. 保管好生成的 token。

Quay 的 API 文档可以参考这里：Appendix A: Red Hat Quay Application Programming Interface (API)。

Quay 中也能看到所有的镜像：

提取 openshift-install 命令

为了保证安装版本一致性，需要从镜像库中提取 openshift-install 二进制文件，不能直接从 https://mirror.openshift.com/pub/openshift-v4/clients/ocp/4.4.5 下载，不然后面会有 sha256 匹配不上的问题。

# 这一步需要用到上面的 export 变量
$ oc adm release extract \
-a ${LOCAL_SECRET_JSON} \
--command=openshift-install \
"${LOCAL_REGISTRY}/${LOCAL_REPOSITORY}:${OCP_RELEASE}"

如果提示 error: image dose not exist，说明拉取的镜像不全，或者版本不对。

把文件移动到 $PATH 并确认版本：

$ chmod +x openshift-install
$ mv openshift-install /usr/local/bin/$ openshift-install version
openshift-install 4.4.5
built from commit 15eac3785998a5bc250c9f72101a4a9cb767e494
release image registry.openshift4.example.com/ocp4/openshift4@sha256:4a461dc23a9d323c8bd7a8631bed078a9e5eec690ce073f78b645c83fb4cdf74

3. 准备 Image Stream 样例镜像

准备一个镜像列表，然后使用 oc image mirror 将镜像同步到私有仓库中：

cat sample-images.txt | while read line; do
target=$(echo $line | sed 's/registry.redhat.io/registry.openshift4.example.com/')
oc image mirror -a ${LOCAL_SECRET_JSON} $line $target
done

如果之前装过 OCP 4.4.5，把 openshift-cluster-samples-operator 项目下 cluster-samples-operator Pod 的 /opt/openshift 目录同步出来，简单 grep 一下就都有了完整的镜像列表。

完整列表参考这里。

同步过程中如果遇到报错，可根据报错信息到 Quay 中创建相应的 Organization，不用中断任务。这里给出一个参考，需要创建以下的 Organization：

rhscl
jboss-datavirt-6
3scale-amp21
3scale-amp22
3scale-amp23
3scale-amp24
3scale-amp25
3scale-amp26
jboss-eap-6
devtools
openshift3
rhpam-7
rhdm-7
jboss-amq-6
jboss-datagrid-7
jboss-datagrid-6
jboss-webserver-3
amq-broker-7
jboss-webserver-5
redhat-sso-7
openjdk
redhat-openjdk-18
fuse7
dotnet

4. 准备 OperatorHub 离线资源

首先在 Quay 中创建一个 devinfra 项目，然后构建 RedHat Operators 的 catalog image, 保存为 registry.openshift4.example.com/devinfra/redhat-operators:v1。

$ oc adm catalog build \
-a ${LOCAL_SECRET_JSON} \
--appregistry-endpoint https://quay.io/cnr \
--from=registry.redhat.io/openshift4/ose-operator-registry:v4.4 \
--appregistry-org redhat-operators \
--to=registry.openshift4.example.com/devinfra/redhat-operators:v1

这个 catalog image 相当于 RedHat Operators 的一个目录，通过 catalog image 可以找到 RedHat Operators 的所有镜像。而且 catalog image 使用 sha256 digest 来引用镜像，能够确保应用有稳定可重复的部署。

然后使用 catalog image 同步 RedHat Operators 的所有镜像到私有仓库：

$ oc adm catalog mirror \
-a ${LOCAL_SECRET_JSON} \
registry.openshift4.example.com/devinfra/redhat-operators:v1 \
registry.openshift4.example.com

如果执行过程中遇到 project not found 之类的错误，可根据报错信息到 Quay 中创建相应的项目，不用中断任务。

这里还会遇到一个 bug，执行到最后会有如下的报错信息：

...
I0409 08:04:48.342110 11331 mirror.go:231] wrote database to /tmp/db-225652515/bundles.db
W0409 08:04:48.347417 11331 mirror.go:258] errors during mirroring. the full contents of the catalog may not have been mirrored: couldn't parse image for mirroring (), skipping mirror: invalid reference format
I0409 08:04:48.385816 11331 mirror.go:329] wrote mirroring manifests to redhat-operators-manifests

先来看看有哪些 Operators：

$ sqlite3 /tmp/db-225652515/bundles.db 'select * from related_image'|grep '^|'

随便挑一个 Operator，查看其 ClusterServiceVersion 的 spec.relatedImages 字段内容：

$ cat /tmp/cache-943388495/manifests-698804708/3scale-operator/3scale-operator-9re7jpyl/0.5.0/3scale-operator.v0.5.0.clusterserviceversion.yaml...
spec:
replaces: 3scale-operator.v0.4.2
relatedImages:
- name: apicast-gateway-rhel8
image: registry.redhat.io/3scale-amp2/apicast-gateway-rhel8@sha256:21be62a6557846337dc0cf764be63442718fab03b95c198a301363886a9e74f9
- name: backend-rhel7
image: registry.redhat.io/3scale-amp2/backend-rhel7@sha256:ea8a31345d3c2a56b02998b019db2e17f61eeaa26790a07962d5e3b66032d8e5
- name: system-rhel7
image: registry.redhat.io/3scale-amp2/system-rhel7@sha256:93819c324831353bb8f7cb6e9910694b88609c3a20d4c1b9a22d9c2bbfbad16f
- name: zync-rhel7
image: registry.redhat.io/3scale-amp2/zync-rhel7@sha256:f4d5c1fdebe306f4e891ddfc4d3045a622d2f01db21ecfc9397cab25c9baa91a
- name: memcached-rhel7
image: registry.redhat.io/3scale-amp2/memcached-rhel7@sha256:ff5f3d2d131631d5db8985a5855ff4607e91f0aa86d07dafdcec4f7da13c9e05
- name: redis-32-rhel7
value: registry.redhat.io/rhscl/redis-32-rhel7@sha256:a9bdf52384a222635efc0284db47d12fbde8c3d0fcb66517ba8eefad1d4e9dc9
- name: mysql-57-rhel7
value: registry.redhat.io/rhscl/mysql-57-rhel7@sha256:9a781abe7581cc141e14a7e404ec34125b3e89c008b14f4e7b41e094fd3049fe
- name: postgresql-10-rhel7
value: registry.redhat.io/rhscl/postgresql-10-rhel7@sha256:de3ab628b403dc5eed986a7f392c34687bddafee7bdfccfd65cecf137ade3dfd
...

可以看到 relatedImages 列表中有些条目的键是 value 而不是 image，这就是问题所在！ 那些没有 image 的条目在反序列化时会将 image 的值当成空字符串 ""：

$ sqlite3 /tmp/db-225652515/bundles.db 'select * from related_image where operatorbundle_name="3scale-operator.v0.5.0"'registry.redhat.io/3scale-amp2/zync-rhel7@sha256:f4d5c1fdebe306f4e891ddfc4d3045a622d2f01db21ecfc9397cab25c9baa91a|3scale-operator.v0.5.0
registry.redhat.io/3scale-amp2/memcached-rhel7@sha256:ff5f3d2d131631d5db8985a5855ff4607e91f0aa86d07dafdcec4f7da13c9e05|3scale-operator.v0.5.0
|3scale-operator.v0.5.0
registry.redhat.io/3scale-amp2/apicast-gateway-rhel8@sha256:21be62a6557846337dc0cf764be63442718fab03b95c198a301363886a9e74f9|3scale-operator.v0.5.0
registry.redhat.io/3scale-amp2/backend-rhel7@sha256:ea8a31345d3c2a56b02998b019db2e17f61eeaa26790a07962d5e3b66032d8e5|3scale-operator.v0.5.0
registry.redhat.io/3scale-amp2/3scale-rhel7-operator@sha256:2ba16314ee046b3c3814fe4e356b728da6853743bd72f8651e1a338e8bbf4f81|3scale-operator.v0.5.0
registry.redhat.io/3scale-amp2/system-rhel7@sha256:93819c324831353bb8f7cb6e9910694b88609c3a20d4c1b9a22d9c2bbfbad16f|3scale-operator.v0.5.0

从上面的输出可以看到键为 value 的那几个条目都反序列化失败了，具体的讨论参考：bundle validate should validate that there are no empty relatedImages。

这里给出一个临时解决方案，先打开另外一个窗口，然后回到原来的窗口执行命令：

$ oc adm catalog mirror \
-a ${LOCAL_SECRET_JSON} \
registry.openshift4.example.com/devinfra/redhat-operators:v1 \
registry.openshift4.example.com

然后迅速切到下一个窗口，查找最新的 manifest 缓存目录：

$ ls -l /tmp/cache-*/

根据日期判断最新的缓存目录，假设是 /tmp/cache-320634009，然后将所有的 value 替换为 image：

$ sed -i "s/value: registry/image: registry/g" $(egrep -rl "value: registry" /tmp/cache-320634009/)

同步完成后会产生 redhat-operators-manifests 目录，下面有两个文件:

  • imageContentSourcePolicy.yaml : 定义了一个 ImageContentSourcePolicy 对象，该对象可以配置节点将其对官方 Operator manifests 中镜像的引用改为对本地镜像仓库中镜像的引用。
  • mapping.txt : 包含了所有的源镜像在本地镜像仓库中的映射位置。oc image mirror 命令可以引用该文件进一步修改镜像配置。

然而目前这么做还是有问题 1800674: 同步出来的镜像 manifest digest 不对，导致后面离线安装 Operator 时会报镜像无法获取的错误。

暂时可以使用上面 bugzilla 链接里给出的临时解决方案，先安装 skopeo：

$ yum install -y golang gpgme-devel libassuan-devel btrfs-progs-devel device-mapper-devel
$ git clone https://github.com/containers/skopeo
$ cd skopeo
$ make binary-local
$ mv skopeo /usr/local/bin/

从 pull-secret.json 中解码 quay.io、registry.redhat.io 和 registry.access.redhat.com 的用户名密码，然后通过下面的命令认证：

$ skopeo login -u <quay.io_user> -p <quay.io_psw> quay.io
$ skopeo login -u <registry.redhat.io_user> -p <registry.redhat.io_psw> registry.redhat.io
$ skopeo login -u <registry.access.redhat.com_user> -p <registry.access.redhat.com_psw> registry.access.redhat.com

最后同步镜像的 manifest digest：

cat redhat-operators-manifests/mapping.txt | while read line; do
origin=$(echo $line | cut -d= -f1)
target=$(echo $line | cut -d= -f2)
if [[ "$origin" =~ "sha256" ]]; then
tag=$(echo $origin | cut -d: -f2 | cut -c -8)
skopeo copy --all docker://$origin docker://$target:$tag
else
skopeo copy --all docker://$origin docker://$target
fi
done

不得不说，OCP 的安装真是个浩大的工程，这洋洋洒洒的一大篇也只是准备了离线资源，这只是安装的一小步，还有很长的步骤要写，心理素质不过关的同学切勿随意模仿。

5. 参考资料

  • 离线部署 Openshift Container Platform 4.3 - 1: 准备离线资源
  • Chapter 9. Using Operator Lifecycle Manager on restricted networks

Kubernetes 1.18.2 1.17.5 1.16.9 1.15.12离线安装包发布地址http://store.lameleg.com ，欢迎体验。 使用了最新的sealos v3.3.6版本。 作了主机名解析配置优化，lvscare 挂载/lib/module解决开机启动ipvs加载问题， 修复lvscare社区netlink与3.10内核不兼容问题,sealos生成百年证书等特性。更多特性 https://github.com/fanux/sealos 。欢迎扫描下方的二维码加入钉钉群 ，钉钉群已经集成sealos的机器人实时可以看到sealos的动态。