# 使用 oc-mirror v2 為離線環境下載 ocp image 至私有鏡倉庫 日期: 2025/12//24 ~ 2025/12/25 模擬情境: 企業環境有一台 Harbor server 可以透過 proxy 連到 redhat 相關 registry。想要把 ocp imgae 放到這個私有 Harbor 做離線環境的 ocp 安裝。 參考資料: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/disconnected_environments/about-installing-oc-mirror-v2 ## 1. 下載 pull secret (需登入 redhat 帳號) https://console.redhat.com/openshift/install/metal/user-provisioned ![image](https://hackmd.io/_uploads/Bye2FDsQbl.png) ## 2. 下載 oc-mirror plugin，並上傳至 server (bastion、harbor本身都可以，反正那台機器可以連到你的私有鏡像倉庫) https://console.redhat.com/openshift/downloads ![image](https://hackmd.io/_uploads/Hkl15voQ-x.png) ```bash= tar xvzf oc-mirror.tar.gz chmod +x oc-mirror sudo mv oc-mirror /usr/local/bin/. #驗證 oc mirror --v2 --help mkdir -p /nfs/peter-ocp-mirror-test/ocp418 cd /nfs/peter-ocp-mirror-test/ocp418 ``` ## 3. pull secret 匯入主機 把第1步驟下載的pull secret 貼進來，並且加上 私有 rigistry 的驗證。 ```bash= #如果有先備份 cp /root/.docker/config.json /root/.docker/config.json.bak cat pull-secret.txt | jq > /root/.docker/config.json podman login har.lab.com cat /root/.docker/config.json ``` 應該會有以下資訊: :::info /root/.dockerconfig.json ```json= { "auths": { "cloud.openshift.com": { "auth":"xxxxxxxxxx", "email":"xxxxxxxxxx@email.com" }, "quay.io": { "auth":"xxxxxxxxxx", "email":"xxxxxxxxxx@email.com" }, "registry.connect.redhat.com": { "auth":"xxxxxxxxxx", "email":"xxxxxxxxxx@email.com" }, "registry.redhat.io": { "auth":"xxxxxxxxxx", "email":"xxxxxxxxxx@email.com" } } } ``` ::: ## 4. 宣告 ImageSetConfiguration ```bash= vim ImageSetConfiguration.yaml ``` :::info ImageSetConfiguration.yaml ```yaml kind: ImageSetConfiguration apiVersion: mirror.openshift.io/v2alpha1 mirror: platform: channels: - name: stable-4.18 minVersion: 4.18.27 maxVersion: 4.18.27 ``` ::: ## 5. 執行 mirror ```bash= cd /nfs/peter-ocp-mirror-test/ocp418 oc-mirror --v2 --cache-dir . -c ImageSetConfiguration.yaml file:///nfs/peter-ocp-mirror-test/ocp418/ ``` :::danger - `-cache-dir`: 很重要! 如果不指定 `cahce` 存放位置會預設會快取到 `${HOME}/.ocmirror/cahace/` 可能會把你的家目錄撐爆，造成 mirror 失敗。 ::: :::spoiler mirror log ```bash= 2025/12/24 17:52:07 [INFO] : 👋 Hello, welcome to oc-mirror 2025/12/24 17:52:07 [INFO] : ⚙️ setting up the environment for you... 2025/12/24 17:52:07 [INFO] : ⚙️ environment version: 4.18.0-202510210939.p2.g0c70491.assembly.stream.el9-0c70491 2025/12/24 17:52:07 [INFO] : 🔀 workflow mode: mirrorToDisk 2025/12/24 17:52:07 [INFO] : 🕵 going to discover the necessary images... 2025/12/24 17:52:07 [INFO] : 🔍 collecting release images... 2025/12/24 17:52:21 [INFO] : 🔍 collecting operator images... 2025/12/24 17:52:21 [INFO] : 🔍 collecting additional images... 2025/12/24 17:52:21 [INFO] : 🔍 collecting helm images... 2025/12/24 17:52:21 [INFO] : 🔂 rebuilding catalogs 2025/12/24 17:52:21 [INFO] : 🚀 Start copying the images... 2025/12/24 17:52:21 [INFO] : 📌 images to copy 189 ✓ (10s) ocp-v4.0-art-dev@sha256:070c4c457c311a9bd4b04b1015d0d1ce289d7854921dee1266e27b06003e5951 ➡️ cache ✓ (10s) 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2025/12/24 17:59:18 [INFO] : === Results === 2025/12/24 17:59:18 [INFO] : ✓ 189 / 189 release images mirrored successfully 2025/12/24 17:59:18 [INFO] : 📦 Preparing the tarball archive... 2025/12/24 18:03:21 [INFO] : mirror time : 11m13.94604859s 2025/12/24 18:03:21 [INFO] : 👋 Goodbye, thank you for using oc-mirror ``` ::: ## 6 建立 harbor project 項目 > 新建項目 > 輸入項目名稱 > 確定 ![image](https://hackmd.io/_uploads/r1qhxot7Wx.png) ## 7.將 image tar 檔 mirror 至私有鏡像倉庫 ```bash= podman login har.lab.com oc-mirror --v2 \ --cache-dir . \ -c ./ImageSetConfiguration.yaml \ --from file:///nfs/peter-ocp-mirror-test/ocp418/ \ docker://har.lab.com/peter-ocp-mirror-test ``` - `--from`: v2 版的只能指定目錄，該目錄底下的 `.tar` 檔都會被推送至私有鏡像倉庫。 :::spoiler mirror log ```bash= oc-mirror --v2 --cache-dir . -c ./ImageSetConfiguration.yaml --from file:///nfs/peter-ocp-mirror-test/ocp418/ docker://har.lab.com/peter-ocp-mirror-test 2025/12/25 01:00:40 [INFO] : 👋 Hello, welcome to oc-mirror 2025/12/25 01:00:40 [INFO] : ⚙️ setting up the environment for you... 2025/12/25 01:00:40 [INFO] : ⚙️ environment version: 4.18.0-202510210939.p2.g0c70491.assembly.stream.el9-0c70491 2025/12/25 01:00:40 [INFO] : 🔀 workflow mode: diskToMirror 2025/12/25 01:00:40 [INFO] : 📦 Extracting mirror archive(s)... /nfs/peter-ocp-mirror-test/ocp418/mirror_000001.tar (20.0 GiB / 20.0 GiB) [=================================================================] 4m37s 2025/12/25 01:05:17 [INFO] : 🕵 going to discover the necessary images... 2025/12/25 01:05:17 [INFO] : 🔍 collecting release images... 2025/12/25 01:05:17 [INFO] : 🔍 collecting operator images... 2025/12/25 01:05:17 [INFO] : 🔍 collecting additional images... 2025/12/25 01:05:17 [INFO] : 🔍 collecting helm images... 2025/12/25 01:05:17 [INFO] : 🚀 Start copying the images... 2025/12/25 01:05:17 [INFO] : 📌 images to copy 189 (0s) ocp-v4.0-art-dev@sha256:0331005b926321624a48f4e38548eb2b83dd9eee3847cc8305f47278b18a77f3 ➡️ har.lab.com/peter-ocp-mirror-test/opee… (0s) ocp-v4.0-art-dev@sha256:03c9565adbc95e1742cd22cd7ced4406dbaa377775e7a935b7ca891bb5232654 ➡️ har.lab.com/peter-ocp-mirror-test/opee… (0s) ocp-v4.0-art-dev@sha256:0331005b926321624a48f4e38548eb2b83dd9eee3847cc8305f47278b18a77f3 ➡️ har.lab.com/peter-ocp-mirror-test/ope… (0s) ocp-v4.0-art-dev@sha256:03c9565adbc95e1742cd22cd7ced4406dbaa377775e7a935b7ca891bb5232654 ➡️ har.lab.com/peter-ocp-mirror-test/ope… ... ... (省略) ... ... ✓ (0s) ocp-v4.0-art-dev@sha256:f870aa3c7bcd039c7905b2c7a9e9c0776d76ed4cf34ccbef872ae7ad8cf2157f ➡️ har.lab.com/peter-ocp-mir… ✓ (0s) ocp-v4.0-art-dev@sha256:faba2837dc58c837289c79cd2c2e9e4c6185f7273f88c0b44cc6b30b17957bb6 ➡️ har.lab.com/peter-ocp-mir… 189 / 189 (23s) [===========================================================================================================================] 100 % ✓ (0s) ocp-release:4.18.27-x86_64 ➡️ har.lab.com/peter-ocp-mirror-test/openshift/ ✓ (0s) ocp-v4.0-art-dev@sha256:ff94e909d3b037c815e8ae67989a7616936e67195b758abac6b5d3f0d59562c8 ➡️ har.lab.com/peter-ocp-mir… ✓ (0s) ocp-v4.0-art-dev@sha256:ff8a5f36a6ed22d1d37e936d78c742dfafebe2910bdd3ab44c5ba0148d3199c4 ➡️ har.lab.com/peter-ocp-mir… 2025/12/25 01:05:41 [INFO] : === Results === 2025/12/25 01:05:41 [INFO] : ✓ 189 / 189 release images mirrored successfully 2025/12/25 01:05:41 [INFO] : 📄 Generating IDMS file... 2025/12/25 01:05:41 [INFO] : /nfs/peter-ocp-mirror-test/ocp418/working-dir/cluster-resources/idms-oc-mirror.yaml file created 2025/12/25 01:05:41 [INFO] : 📄 Generating ITMS file... 2025/12/25 01:05:41 [INFO] : /nfs/peter-ocp-mirror-test/ocp418/working-dir/cluster-resources/itms-oc-mirror.yaml file created 2025/12/25 01:05:41 [INFO] : 📄 No catalogs mirrored. Skipping CatalogSource file generation. 2025/12/25 01:05:41 [INFO] : 📄 No catalogs mirrored. Skipping ClusterCatalog file generation. 2025/12/25 01:05:41 [INFO] : 📄 Generating Signature Configmap... 2025/12/25 01:05:41 [INFO] : /nfs/peter-ocp-mirror-test/ocp418/working-dir/cluster-resources/signature-configmap.json file created 2025/12/25 01:05:41 [INFO] : /nfs/peter-ocp-mirror-test/ocp418/working-dir/cluster-resources/signature-configmap.yaml file created 2025/12/25 01:05:41 [INFO] : mirror time : 5m0.998520682s 2025/12/25 01:05:41 [INFO] : 👋 Goodbye, thank you for using oc-mirror ``` ::: 上傳完成! ![image](https://hackmd.io/_uploads/SJJJZoKXbg.png)