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1.6. 从您自己的基础架构中卸载 OpenStack 上的集群

您可以删除在用户置备的基础架构上部署到 Red Hat OpenStack Platform（RHOSP）中的集群。

1.6.1. 先决条件
复制链接

  • 已在您的机器上

    • 一个目录，您可以在其中创建文件以帮助您执行移除过程
    • Python 3

1.6.2. 下载 playbook 的依赖项
复制链接

用于简化从用户置备的基础架构中移除过程的 Ansible playbook 需要几个 Python 模块。在您要进行这个操作的机器上添加模块的仓库，然后下载它们。

注意

这些说明假设您使用 Red Hat Enterprise Linux（RHEL）8。

先决条件

  • Python 3 已在您的机器上安装

流程

  1. 在命令行中添加软件仓库： 

    $ sudo subscription-manager register # If not done already
$ sudo subscription-manager attach --pool=$YOUR_POOLID # If not done already
$ sudo subscription-manager repos --disable=* # If not done already

$ sudo subscription-manager repos \
  --enable=rhel-8-for-x86_64-baseos-rpms \
  --enable=openstack-16-tools-for-rhel-8-x86_64-rpms \
  --enable=ansible-2.9-for-rhel-8-x86_64-rpms \
  --enable=rhel-8-for-x86_64-appstream-rpms
    Copy to Clipboard Toggle word wrap

  2. 安装模块： 

    $ sudo yum install python3-openstackclient ansible python3-openstacksdk
    Copy to Clipboard Toggle word wrap

  3. 确保 python 命令指向 python3: 

    $ sudo alternatives --set python /usr/bin/python3
    Copy to Clipboard Toggle word wrap

您可以在使用您自己的基础架构的 Red Hat OpenStack Platform（RHOSP）上删除 OpenShift Container Platform 集群。要快速完成移除过程，请创建并运行多个 Ansible playbook。

先决条件

  • Python 3 已在您的机器上安装
  • 下载"下载 playbook 依赖项"中的模块
流程

您可以还会有在安装 OpenShift Container Platform 时留下的 common.yaml 和 inventory.yaml playbook。如果有，则可以跳过该流程的前两个步骤。

  1. 将以下内容插入到名为 common.yaml 的本地文件中：

    例 1.17. common.yaml Ansible playbook

    - hosts: localhost
  gather_facts: no

  vars_files:
  - metadata.json

  tasks:
  - name: 'Compute resource names'
    set_fact:
      cluster_id_tag: "openshiftClusterID={{ infraID }}"
      os_network: "{{ infraID }}-network"
      os_subnet: "{{ infraID }}-nodes"
      os_router: "{{ infraID }}-external-router"
      # Port names
      os_port_api: "{{ infraID }}-api-port"
      os_port_ingress: "{{ infraID }}-ingress-port"
      os_port_bootstrap: "{{ infraID }}-bootstrap-port"
      os_port_master: "{{ infraID }}-master-port"
      os_port_worker: "{{ infraID }}-worker-port"
      # Security groups names
      os_sg_master: "{{ infraID }}-master"
      os_sg_worker: "{{ infraID }}-worker"
      # Server names
      os_bootstrap_server_name: "{{ infraID }}-bootstrap"
      os_cp_server_name: "{{ infraID }}-master"
      os_compute_server_name: "{{ infraID }}-worker"
      # Trunk names
      os_cp_trunk_name: "{{ infraID }}-master-trunk"
      os_compute_trunk_name: "{{ infraID }}-worker-trunk"
      # Subnet pool name
      subnet_pool: "{{ infraID }}-kuryr-pod-subnetpool"
      # Service network name
      os_svc_network: "{{ infraID }}-kuryr-service-network"
      # Service subnet name
      os_svc_subnet: "{{ infraID }}-kuryr-service-subnet"
      # Ignition files
      os_bootstrap_ignition: "{{ infraID }}-bootstrap-ignition.json"
    Copy to Clipboard Toggle word wrap

  2. 将以下内容插入到名为 inventory.yaml 的本地文件中，并编辑值以匹配您自己的值：

    例 1.18. inventory.yaml Ansible playbook

    all:
  hosts:
    localhost:
      ansible_connection: local
      ansible_python_interpreter: "{{ansible_playbook_python}}"

      # User-provided values
      os_subnet_range: '10.0.0.0/16'
      os_flavor_master: 'm1.xlarge'
      os_flavor_worker: 'm1.large'
      os_image_rhcos: 'rhcos'
      os_external_network: 'external'
      # OpenShift API floating IP address
      os_api_fip: '203.0.113.23'
      # OpenShift Ingress floating IP address
      os_ingress_fip: '203.0.113.19'
      # Service subnet cidr
      svc_subnet_range: '172.30.0.0/16'
      os_svc_network_range: '172.30.0.0/15'
      # Subnet pool prefixes
      cluster_network_cidrs: '10.128.0.0/14'
      # Subnet pool prefix length
      host_prefix: '23'
      # Name of the SDN.
      # Possible values are OpenshiftSDN or Kuryr.
      os_networking_type: 'OpenshiftSDN'

      # Number of provisioned Control Plane nodes
      # 3 is the minimum number for a fully-functional cluster.
      os_cp_nodes_number: 3

      # Number of provisioned Compute nodes.
      # 3 is the minimum number for a fully-functional cluster.
      os_compute_nodes_number: 3
    Copy to Clipboard Toggle word wrap

  3. 可选: 如果您的集群使用 Kuryr，将以下内容插入到名为 down-06_load-balancers.yaml 的本地文件中：

    例 1.19. down-06_load-balancers.yaml

    # Required Python packages:
#
# ansible
# openstackcli
# openstacksdk

- import_playbook: common.yaml

- hosts: all
  gather_facts: no

  tasks:
  - name: 'Get a token for creating the server group'
    os_auth:
    register: cloud
    when: os_networking_type == "Kuryr"

  - name: 'List octavia versions'
    uri:
      method: GET
      headers:
        X-Auth-Token: "{{ cloud.ansible_facts.auth_token }}"
        Content-Type: 'application/json'
      url: "{{ cloud.ansible_facts.service_catalog | selectattr('name', 'match', 'octavia') | first | json_query('endpoints') | selectattr('interface', 'match', 'public') | first | json_query('url') }}/"
    register: octavia_versions
    when: os_networking_type == "Kuryr"

  - set_fact:
      versions: "{{ octavia_versions.json.versions | selectattr('id', 'match', 'v2.5') | map(attribute='id') | list }}"
    when: os_networking_type == "Kuryr"

  - name: 'List tagged loadbalancers'
    uri:
      method: GET
      headers:
        X-Auth-Token: "{{ cloud.ansible_facts.auth_token }}"
      url: "{{ cloud.ansible_facts.service_catalog | selectattr('name', 'match', 'octavia') | first | json_query('endpoints') | selectattr('interface', 'match', 'public') | first | json_query('url') }}/v2.0/lbaas/loadbalancers?tags={{cluster_id_tag}}"
    when:
    - os_networking_type == "Kuryr"
    - versions | length > 0
    register: lbs_tagged

  # NOTE: Kuryr creates an Octavia load balancer
  # for each service present on the cluster. Let's make
  # sure to remove the resources generated.
  - name: 'Remove the cluster load balancers'
    command:
      cmd: "openstack loadbalancer delete --cascade {{ item.id }}"
    with_items: "{{ lbs_tagged.json.loadbalancers }}"
    when:
    - os_networking_type == "Kuryr"
    - versions | length > 0
    - '"PENDING" not in item.provisioning_status'

  - name: 'List loadbalancers tagged on description'
    uri:
      method: GET
      headers:
        X-Auth-Token: "{{ cloud.ansible_facts.auth_token }}"
      url: "{{ cloud.ansible_facts.service_catalog | selectattr('name', 'match', 'octavia') | first | json_query('endpoints') | selectattr('interface', 'match', 'public') | first | json_query('url') }}/v2.0/lbaas/loadbalancers?description={{cluster_id_tag}}"
    when:
    - os_networking_type == "Kuryr"
    - versions | length == 0
    register: lbs_description

  # NOTE: Kuryr creates an Octavia load balancer
  # for each service present on the cluster. Let's make
  # sure to remove the resources generated.
  - name: 'Remove the cluster load balancers'
    command:
      cmd: "openstack loadbalancer delete --cascade {{ item.id }}"
    with_items: "{{ lbs_description.json.loadbalancers }}"
    when:
    - os_networking_type == "Kuryr"
    - versions | length == 0
    - '"PENDING" not in item.provisioning_status'
    Copy to Clipboard Toggle word wrap

  4. 将以下内容插入到名为 down-05_compute-nodes.yaml 的本地文件中：

    例 1.20. down-05_compute-nodes.yaml

    # Required Python packages:
#
# ansible
# openstackclient
# openstacksdk

- import_playbook: common.yaml

- hosts: all
  gather_facts: no

  tasks:
  - name: 'Remove the Compute servers'
    os_server:
      name: "{{ item.1 }}-{{ item.0 }}"
      state: absent
    with_indexed_items: "{{ [os_compute_server_name] * os_compute_nodes_number }}"

  - name: 'List the Compute trunks'
    command:
      cmd: "openstack network trunk list -c Name -f value"
    when: os_networking_type == "Kuryr"
    register: trunks

  - name: 'Remove the Compute trunks'
    command:
      cmd: "openstack network trunk delete {{ item.1 }}-{{ item.0 }}"
    when:
    - os_networking_type == "Kuryr"
    - (item.1|string + '-' + item.0|string) in trunks.stdout_lines|list
    with_indexed_items: "{{ [os_compute_trunk_name] * os_compute_nodes_number }}"

  - name: 'Remove the Compute ports'
    os_port:
      name: "{{ item.1 }}-{{ item.0 }}"
      state: absent
    with_indexed_items: "{{ [os_port_worker] * os_compute_nodes_number }}"
    Copy to Clipboard Toggle word wrap

  5. 将以下内容插入到名为 down-04_control-plane.yaml 的本地文件中：

    例 1.21. down-04_control-plane.yaml

    # Required Python packages:
#
# ansible
# openstackclient
# openstacksdk

- import_playbook: common.yaml

- hosts: all
  gather_facts: no

  tasks:
  - name: 'Remove the Control Plane servers'
    os_server:
      name: "{{ item.1 }}-{{ item.0 }}"
      state: absent
    with_indexed_items: "{{ [os_cp_server_name] * os_cp_nodes_number }}"

  - name: 'List the Compute trunks'
    command:
      cmd: "openstack network trunk list -c Name -f value"
    when: os_networking_type == "Kuryr"
    register: trunks

  - name: 'Remove the Control Plane trunks'
    command:
      cmd: "openstack network trunk delete {{ item.1 }}-{{ item.0 }}"
    when:
    - os_networking_type == "Kuryr"
    - (item.1|string + '-' + item.0|string) in trunks.stdout_lines|list
    with_indexed_items: "{{ [os_cp_trunk_name] * os_cp_nodes_number }}"

  - name: 'Remove the Control Plane ports'
    os_port:
      name: "{{ item.1 }}-{{ item.0 }}"
      state: absent
    with_indexed_items: "{{ [os_port_master] * os_cp_nodes_number }}"
    Copy to Clipboard Toggle word wrap

  6. 将以下内容插入到名为 down-03_bootstrap.yaml 的本地文件中：

    例 1.22. down-03_bootstrap.yaml

    # Required Python packages:
#
# ansible
# openstacksdk

- import_playbook: common.yaml

- hosts: all
  gather_facts: no

  tasks:
  - name: 'Remove the bootstrap server'
    os_server:
      name: "{{ os_bootstrap_server_name }}"
      state: absent
      delete_fip: yes

  - name: 'Remove the bootstrap server port'
    os_port:
      name: "{{ os_port_bootstrap }}"
      state: absent
    Copy to Clipboard Toggle word wrap

  7. 将以下内容插入到名为 down-02_network.yaml 的本地文件中：

    例 1.23. down-02_network.yaml

    # Required Python packages:
#
# ansible
# openstackclient
# openstacksdk

- import_playbook: common.yaml

- hosts: all
  gather_facts: no

  tasks:
  - name: 'List ports attatched to router'
    command:
      cmd: "openstack port list --device-owner=network:router_interface --tags {{ cluster_id_tag }} -f value -c id"
    register: router_ports

  - name: 'Remove the ports from router'
    command:
      cmd: "openstack router remove port {{ os_router }} {{ item.1}}"
    with_indexed_items: "{{ router_ports.stdout_lines }}"

  - name: 'List ha ports attached to router'
    command:
      cmd: "openstack port list --device-owner=network:ha_router_replicated_interface --tags {{ cluster_id_tag }} -f value -c id"
    register: ha_router_ports

  - name: 'Remove the ha ports from router'
    command:
      cmd: "openstack router remove port {{ os_router }} {{ item.1}}"
    with_indexed_items: "{{ ha_router_ports.stdout_lines }}"

  - name: 'List ports'
    command:
      cmd: "openstack port list --tags {{ cluster_id_tag }} -f value -c id "
    register: ports

  - name: 'Remove the cluster ports'
    command:
      cmd: "openstack port delete {{ item.1}}"
    with_indexed_items: "{{ ports.stdout_lines }}"

  - name: 'Remove the cluster router'
    os_router:
      name: "{{ os_router }}"
      state: absent

  - name: 'List cluster networks'
    command:
      cmd: "openstack network list --tags {{ cluster_id_tag }} -f value -c Name"
    register: networks

  - name: 'Remove the cluster networks'
    os_network:
      name: "{{ item.1}}"
      state: absent
    with_indexed_items: "{{ networks.stdout_lines }}"

  - name: 'List the cluster subnet pool'
    command:
      cmd: "openstack subnet pool list --name {{ subnet_pool }}"
    when: os_networking_type == "Kuryr"
    register: pods_subnet_pool

  - name: 'Remove the cluster subnet pool'
    command:
      cmd: "openstack subnet pool delete {{ subnet_pool }}"
    when:
    - os_networking_type == "Kuryr"
    - pods_subnet_pool.stdout != ""
    Copy to Clipboard Toggle word wrap

  8. 将以下内容插入到名为 down-01_security-groups.yaml 的本地文件中：

    例 1.24. down-01_security-groups.yaml

    # Required Python packages:
#
# ansible
# openstackclient
# openstacksdk

- import_playbook: common.yaml

- hosts: all
  gather_facts: no

  tasks:
  - name: 'List security groups'
    command:
      cmd: "openstack security group list --tags {{ cluster_id_tag }} -f value -c ID"
    register: security_groups

  - name: 'Remove the cluster security groups'
    command:
      cmd: "openstack security group delete {{ item.1 }}"
    with_indexed_items: "{{ security_groups.stdout_lines }}"
    Copy to Clipboard Toggle word wrap

  9. 在命令行中运行您创建的 playbook: 

    $ ansible-playbook -i inventory.yaml  \
	down-03_bootstrap.yaml      \
	down-04_control-plane.yaml  \
	down-05_compute-nodes.yaml  \
	down-06_load-balancers.yaml \
	down-02_network.yaml        \
	down-01_security-groups.yaml
    Copy to Clipboard Toggle word wrap
  10. 删除您为 OpenShift Container Platform 安装所做的任何 DNS 记录更改。

OpenShift Container Platform 被从您的基础架构中删除。

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