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12.4. 使用 API 添加主机

您可以使用 Assisted Installer REST API 将主机添加到集群。

先决条件

  • 安装 OpenShift Cluster Manager CLI (ocm)。
  • 以具有集群创建权限的用户身份登录 OpenShift Cluster Manager。
  • 安装 jq。
  • 确保您要扩展的集群存在所有必需的 DNS 记录。

流程

  1. 针对 Assisted Installer REST API 进行身份验证，并为会话生成 API 令牌。生成的令牌有效期仅为 15 分钟。

  2. 运行以下命令设置 $API_URL 变量： 

    $ export API_URL=<api_url>
    1
    Copy to Clipboard Toggle word wrap
    1
    将 <api_url> 替换为 Assisted Installer API URL，例如 https://api.openshift.com

  3. 运行以下命令导入集群：

    1. 设置 $CLUSTER_ID 变量。登录到集群并运行以下命令： 

      $ export CLUSTER_ID=$(oc get clusterversion -o jsonpath='{.items[].spec.clusterID}')
      Copy to Clipboard Toggle word wrap

    2. 设置用于导入集群的 $CLUSTER_REQUEST 变量： 

      $ export CLUSTER_REQUEST=$(jq --null-input --arg openshift_cluster_id "$CLUSTER_ID" '{
  "api_vip_dnsname": "<api_vip>",
      1 
      
  "openshift_cluster_id": $CLUSTER_ID,
  "name": "<openshift_cluster_name>"
      2 
      
}')
      Copy to Clipboard Toggle word wrap
      1
      将 <api_vip> 替换为集群 API 服务器的主机名。这可以是 API 服务器的 DNS 域，也可以是主机可访问的单一节点的 IP 地址。例如： api.compute-1.example.com。
      2
      将 <openshift_cluster_name> 替换为集群的纯文本名称。集群名称应与在第 1 天集群安装过程中设置的集群名称匹配。

    3. 导入集群并设置 $CLUSTER_ID 变量。运行以下命令： 

      $ CLUSTER_ID=$(curl "$API_URL/api/assisted-install/v2/clusters/import" -H "Authorization: Bearer ${API_TOKEN}" -H 'accept: application/json' -H 'Content-Type: application/json' \
  -d "$CLUSTER_REQUEST" | tee /dev/stderr | jq -r '.id')
      Copy to Clipboard Toggle word wrap

  4. 运行以下命令，为集群生成 InfraEnv 资源并设置 $INFRA_ENV_ID 变量：

    1. 从位于 console.redhat.com 的 Red Hat OpenShift Cluster Manager 下载 pull secret 文件。

    2. 设置 $INFRA_ENV_REQUEST 变量： 

      export INFRA_ENV_REQUEST=$(jq --null-input \
    --slurpfile pull_secret <path_to_pull_secret_file> \
      1 
      
    --arg ssh_pub_key "$(cat <path_to_ssh_pub_key>)" \
      2 
      
    --arg cluster_id "$CLUSTER_ID" '{
  "name": "<infraenv_name>",
      3 
      
  "pull_secret": $pull_secret[0] | tojson,
  "cluster_id": $cluster_id,
  "ssh_authorized_key": $ssh_pub_key,
  "image_type": "<iso_image_type>"
      4 
      
}')
      Copy to Clipboard Toggle word wrap
      1
      将 <path_to_pull_secret_file> 替换为在 console.redhat.com 上从 Red Hat OpenShift Cluster Manager 下载的 pull secret 的本地文件的路径。
      2
      将 <path_to_ssh_pub_key> 替换为访问主机所需的公共 SSH 密钥路径。如果没有设置这个值，则无法在发现模式下访问主机。
      3
      将 <infraenv_name> 替换为 InfraEnv 资源的纯文本名称。
      4
      将 <iso_image_type> 替换为 ISO 镜像类型，可以是 full-iso 或 minimal-iso。

    3. 将 $INFRA_ENV_REQUEST 发布到 /v2/infra-envs API，并设置 $INFRA_ENV_ID 变量： 

      $ INFRA_ENV_ID=$(curl "$API_URL/api/assisted-install/v2/infra-envs" -H "Authorization: Bearer ${API_TOKEN}" -H 'accept: application/json' -H 'Content-Type: application/json' -d "$INFRA_ENV_REQUEST" | tee /dev/stderr | jq -r '.id')
      Copy to Clipboard Toggle word wrap

  5. 运行以下命令，获取集群主机的发现 ISO 的 URL： 

    $ curl -s "$API_URL/api/assisted-install/v2/infra-envs/$INFRA_ENV_ID" -H "Authorization: Bearer ${API_TOKEN}" | jq -r '.download_url'
    Copy to Clipboard Toggle word wrap

    输出示例

    https://api.openshift.com/api/assisted-images/images/41b91e72-c33e-42ee-b80f-b5c5bbf6431a?arch=x86_64&image_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2NTYwMjYzNzEsInN1YiI6IjQxYjkxZTcyLWMzM2UtNDJlZS1iODBmLWI1YzViYmY2NDMxYSJ9.1EX_VGaMNejMhrAvVRBS7PDPIQtbOOc8LtG8OukE1a4&type=minimal-iso&version=4.12
    Copy to Clipboard Toggle word wrap

  6. 下载 ISO： 

    $ curl -L -s '<iso_url>' --output rhcos-live-minimal.iso
    1
    Copy to Clipboard Toggle word wrap
    1
    将 <iso_url> 替换为上一步中的 ISO URL。
  7. 从下载的 rhcos-live-minimal.iso 中引导新的 worker 主机。

  8. 获取没有安装的集群中的主机列表。继续运行以下命令，直到新主机显示： 

    $ curl -s "$API_URL/api/assisted-install/v2/clusters/$CLUSTER_ID" -H "Authorization: Bearer ${API_TOKEN}" | jq -r '.hosts[] | select(.status != "installed").id'
    Copy to Clipboard Toggle word wrap

    输出示例

    2294ba03-c264-4f11-ac08-2f1bb2f8c296
    Copy to Clipboard Toggle word wrap

  9. 为新主机设置 $HOST_ID 变量，例如： 

    $ HOST_ID=<host_id>
    1
    Copy to Clipboard Toggle word wrap
    1
    将 <host_id> 替换为上一步中的主机 ID。

  10. 运行以下命令检查主机是否已就绪：

    注意

    确保复制整个命令，包括完整的 jq 表达式。 

    $ curl -s $API_URL/api/assisted-install/v2/clusters/$CLUSTER_ID -H "Authorization: Bearer ${API_TOKEN}" | jq '
def host_name($host):
    if (.suggested_hostname // "") == "" then
        if (.inventory // "") == "" then
            "Unknown hostname, please wait"
        else
            .inventory | fromjson | .hostname
        end
    else
        .suggested_hostname
    end;

def is_notable($validation):
    ["failure", "pending", "error"] | any(. == $validation.status);

def notable_validations($validations_info):
    [
        $validations_info // "{}"
        | fromjson
        | to_entries[].value[]
        | select(is_notable(.))
    ];

{
    "Hosts validations": {
        "Hosts": [
            .hosts[]
            | select(.status != "installed")
            | {
                "id": .id,
                "name": host_name(.),
                "status": .status,
                "notable_validations": notable_validations(.validations_info)
            }
        ]
    },
    "Cluster validations info": {
        "notable_validations": notable_validations(.validations_info)
    }
}
' -r
    Copy to Clipboard Toggle word wrap

    输出示例

    {
  "Hosts validations": {
    "Hosts": [
      {
        "id": "97ec378c-3568-460c-bc22-df54534ff08f",
        "name": "localhost.localdomain",
        "status": "insufficient",
        "notable_validations": [
          {
            "id": "ntp-synced",
            "status": "failure",
            "message": "Host couldn't synchronize with any NTP server"
          },
          {
            "id": "api-domain-name-resolved-correctly",
            "status": "error",
            "message": "Parse error for domain name resolutions result"
          },
          {
            "id": "api-int-domain-name-resolved-correctly",
            "status": "error",
            "message": "Parse error for domain name resolutions result"
          },
          {
            "id": "apps-domain-name-resolved-correctly",
            "status": "error",
            "message": "Parse error for domain name resolutions result"
          }
        ]
      }
    ]
  },
  "Cluster validations info": {
    "notable_validations": []
  }
}
    Copy to Clipboard Toggle word wrap

  11. 当上一个命令显示主机就绪时，通过运行以下命令来使用 /v2/infra-envs/{infra_env_id}/hosts/{host_id}/actions/install API 开始安装： 

    $ curl -X POST -s "$API_URL/api/assisted-install/v2/infra-envs/$INFRA_ENV_ID/hosts/$HOST_ID/actions/install"  -H "Authorization: Bearer ${API_TOKEN}"
    Copy to Clipboard Toggle word wrap

  12. 当安装继续进行时，安装会为主机生成待处理的证书签名请求 (CSR)。

    重要

    您必须批准 CSR 才能完成安装。

    运行以下 API 调用以监控集群安装： 

    $ curl -s "$API_URL/api/assisted-install/v2/clusters/$CLUSTER_ID" -H "Authorization: Bearer ${API_TOKEN}" | jq '{
    "Cluster day-2 hosts":
        [
            .hosts[]
            | select(.status != "installed")
            | {id, requested_hostname, status, status_info, progress, status_updated_at, updated_at, infra_env_id, cluster_id, created_at}
        ]
}'
    Copy to Clipboard Toggle word wrap

    输出示例

    {
  "Cluster day-2 hosts": [
    {
      "id": "a1c52dde-3432-4f59-b2ae-0a530c851480",
      "requested_hostname": "control-plane-1",
      "status": "added-to-existing-cluster",
      "status_info": "Host has rebooted and no further updates will be posted. Please check console for progress and to possibly approve pending CSRs",
      "progress": {
        "current_stage": "Done",
        "installation_percentage": 100,
        "stage_started_at": "2022-07-08T10:56:20.476Z",
        "stage_updated_at": "2022-07-08T10:56:20.476Z"
      },
      "status_updated_at": "2022-07-08T10:56:20.476Z",
      "updated_at": "2022-07-08T10:57:15.306369Z",
      "infra_env_id": "b74ec0c3-d5b5-4717-a866-5b6854791bd3",
      "cluster_id": "8f721322-419d-4eed-aa5b-61b50ea586ae",
      "created_at": "2022-07-06T22:54:57.161614Z"
    }
  ]
}
    Copy to Clipboard Toggle word wrap

  13. 可选： 运行以下命令以查看集群的所有事件： 

    $ curl -s "$API_URL/api/assisted-install/v2/events?cluster_id=$CLUSTER_ID" -H "Authorization: Bearer ${API_TOKEN}" | jq -c '.[] | {severity, message, event_time, host_id}'
    Copy to Clipboard Toggle word wrap

    输出示例

    {"severity":"info","message":"Host compute-0: updated status from insufficient to known (Host is ready to be installed)","event_time":"2022-07-08T11:21:46.346Z","host_id":"9d7b3b44-1125-4ad0-9b14-76550087b445"}
{"severity":"info","message":"Host compute-0: updated status from known to installing (Installation is in progress)","event_time":"2022-07-08T11:28:28.647Z","host_id":"9d7b3b44-1125-4ad0-9b14-76550087b445"}
{"severity":"info","message":"Host compute-0: updated status from installing to installing-in-progress (Starting installation)","event_time":"2022-07-08T11:28:52.068Z","host_id":"9d7b3b44-1125-4ad0-9b14-76550087b445"}
{"severity":"info","message":"Uploaded logs for host compute-0 cluster 8f721322-419d-4eed-aa5b-61b50ea586ae","event_time":"2022-07-08T11:29:47.802Z","host_id":"9d7b3b44-1125-4ad0-9b14-76550087b445"}
{"severity":"info","message":"Host compute-0: updated status from installing-in-progress to added-to-existing-cluster (Host has rebooted and no further updates will be posted. Please check console for progress and to possibly approve pending CSRs)","event_time":"2022-07-08T11:29:48.259Z","host_id":"9d7b3b44-1125-4ad0-9b14-76550087b445"}
{"severity":"info","message":"Host: compute-0, reached installation stage Rebooting","event_time":"2022-07-08T11:29:48.261Z","host_id":"9d7b3b44-1125-4ad0-9b14-76550087b445"}
    Copy to Clipboard Toggle word wrap

  14. 登录到集群并批准待处理的 CSR 以完成安装。

验证

  • 检查新主机是否已成功添加到集群中，状态为 Ready ： 

    $ oc get nodes
    Copy to Clipboard Toggle word wrap

    输出示例

    NAME                           STATUS   ROLES           AGE   VERSION
control-plane-1.example.com    Ready    master,worker   56m   v1.25.0
compute-1.example.com          Ready    worker          11m   v1.25.0
    Copy to Clipboard Toggle word wrap

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