Add an argument to host configure to wipe block devices
This can be necessary when there are existing partition tables or LVM headers e.g. from a previous installation.
This commit is contained in:
Mark Goddard
parent
fce4df3143
commit
12884dd121
12
README.md
12
README.md
@ -116,6 +116,12 @@ Image Builder (DIB). To configure the seed host OS:
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(kayobe-venv) $ kayobe seed host configure
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If the seed host uses disks that have been in use in a previous installation,
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it may be necessary to wipe partition and LVM data from those disks. To wipe
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all disks that are not mounted during host configuration:
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(kayobe-venv) $ kayobe seed host configure --wipe-disks
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It is possible to use prebuilt container images from an image registry such as
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Dockerhub. In some cases it may be necessary to build images locally either to
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apply local image customisation or to use a downstream version of Kolla. To
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@ -159,6 +165,12 @@ provisioned with an OS image. To configure the overcloud hosts' OS:
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(kayobe-venv) $ kayobe overcloud host configure
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If the controller hosts use disks that have been in use in a previous
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installation, it may be necessary to wipe partition and LVM data from those
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disks. To wipe all disks that are not mounted during host configuration:
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(kayobe-venv) $ kayobe overcloud host configure --wipe-disks
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It is possible to use prebuilt container images from an image registry such as
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Dockerhub. In some cases it may be necessary to build images locally either to
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apply local image customisation or to use a downstream version of Kolla. To
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60
ansible/roles/wipe-disks/tasks/main.yml
Normal file
60
ansible/roles/wipe-disks/tasks/main.yml
Normal file
@ -0,0 +1,60 @@
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---
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# Warning! These tasks can result in lost data. Take care when developing and
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# using them.
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# Initialisation tasks to be applied on first boot of a system to initalise
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# disks. We search for block devices that are not currently mounted, then wipe
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# any LVM or file system state from them.
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- name: Ensure LVM2 is installed
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yum:
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name: lvm2
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state: present
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become: True
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- name: Check for unmounted block devices
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shell: >
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lsblk -i -o NAME,MOUNTPOINT | awk \
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'/^ *[|`]-/ && NF > 1 { mounts[master_dev] = mounts[master_dev] $2 " " }
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/^sd/ && NF == 1 { master_dev = $1; mounts[master_dev] = "" }
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END { for (dev in mounts) if (mounts[dev] == "") print dev }'
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register: unmounted_devices
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changed_when: False
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- name: Ensure that all unmounted block devices have LVM state removed
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shell: |
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set -e
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if pvs /dev/{{ item }} >/dev/null 2>&1
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then
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echo "Found PV on /dev/{{ item }}"
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vg=$(pvs --noheadings -o vg_name /dev/{{ item }})
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if [[ -n $vg ]] && [[ $vg != " " ]]
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then
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echo "Found VG $vg on PV /dev/{{ item }}"
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lvs --noheadings -o lv_name $vg | while read lv
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do
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if [[ -n $lv ]] && [[ $lv != " " ]]
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then
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echo "Found LV $lv on VG $vg. Removing"
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lvremove -yf ${vg}/${lv}
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fi
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done
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vgremove -f $vg
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fi
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pvremove -yff /dev/{{ item }}
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fi
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with_items: "{{ unmounted_devices.stdout_lines }}"
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become: True
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- name: Ensure that all unmounted block devices have filesystems wiped
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command: "wipefs -f /dev/{{ item }}"
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with_items: "{{ unmounted_devices.stdout_lines }}"
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become: True
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# The command can fail in some cases which are valid, so ignore the
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# result.
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failed_when: False
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- name: Ensure that all unmounted block device headers are zeroed
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command: "dd if=/dev/zero of=/dev/{{ item }} bs=1M count=100"
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with_items: "{{ unmounted_devices.stdout_lines }}"
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become: True
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12
ansible/wipe-disks.yml
Normal file
12
ansible/wipe-disks.yml
Normal file
@ -0,0 +1,12 @@
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---
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# Warning! This play can result in lost data. Take care when developing and
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# using it.
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# Initialisation task to be applied on first boot of a system to initalise
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# disks. We search for block devices that are not currently mounted, then wipe
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# any LVM or file system state from them.
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- name: Ensure that all unmounted block devices are wiped
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hosts: seed:controllers
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roles:
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- role: wipe-disks
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@ -160,12 +160,24 @@ class SeedVMProvision(KollaAnsibleMixin, KayobeAnsibleMixin, Command):
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class SeedHostConfigure(KollaAnsibleMixin, KayobeAnsibleMixin, Command):
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"""Configure the seed node host OS."""
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def get_parser(self, prog_name):
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parser = super(SeedHostConfigure, self).get_parser(prog_name)
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group = parser.add_argument_group("Host Configuration")
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group.add_argument("--wipe-disks", action='store_true',
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help="wipe partition and LVM data from all disks "
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"that are not mounted. Warning: this can "
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"result in the loss of data")
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return parser
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def take_action(self, parsed_args):
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self.app.LOG.debug("Configuring seed host OS")
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ansible_user = ansible.config_dump(parsed_args, host="seed",
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var_name="kayobe_ansible_user")
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playbooks = _build_playbook_list(
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"ip-allocation", "ssh-known-host", "kayobe-ansible-user",
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"ip-allocation", "ssh-known-host", "kayobe-ansible-user")
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if parsed_args.wipe_disks:
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playbooks += _build_playbook_list("disk-wipe")
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playbooks += _build_playbook_list(
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"dev-tools", "disable-selinux", "network", "ntp", "lvm")
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ansible.run_playbooks(parsed_args, playbooks, limit="seed")
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kolla_ansible.run_seed(parsed_args, "bootstrap-servers",
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@ -245,12 +257,24 @@ class OvercloudProvision(KayobeAnsibleMixin, Command):
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class OvercloudHostConfigure(KollaAnsibleMixin, KayobeAnsibleMixin, Command):
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"""Configure the overcloud host OS."""
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def get_parser(self, prog_name):
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parser = super(OvercloudHostConfigure, self).get_parser(prog_name)
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group = parser.add_argument_group("Host Configuration")
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group.add_argument("--wipe-disks", action='store_true',
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help="wipe partition and LVM data from all disks "
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"that are not mounted. Warning: this can "
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"result in the loss of data")
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return parser
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def take_action(self, parsed_args):
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self.app.LOG.debug("Configuring overcloud host OS")
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ansible_user = ansible.config_dump(parsed_args, host="controllers[0]",
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var_name="kayobe_ansible_user")
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playbooks = _build_playbook_list(
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"ip-allocation", "ssh-known-host", "kayobe-ansible-user",
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"ip-allocation", "ssh-known-host", "kayobe-ansible-user")
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if parsed_args.wipe_disks:
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playbooks += _build_playbook_list("disk-wipe")
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playbooks += _build_playbook_list(
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"dev-tools", "disable-selinux", "network", "ntp", "lvm")
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ansible.run_playbooks(parsed_args, playbooks, limit="controllers")
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kolla_ansible.run_overcloud(parsed_args, "bootstrap-servers",
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