2bd15db036
Problem: libvirt password/key injection uses libguestfs to mount the guest filesystem. libguestfs uses a supermin appliance, and in order to create this appliance, libguestfs (running as nova user) must read the host's kernel. Unfortunately, Ubuntu sets file permissions which make compressed kernels non-readable to non-root users, and this breaks libvirt password/key injection on compute hosts running Ubuntu. Solution: When compute hosts are running Ubuntu AND the deployer has enabled libvirt password or SSH key injection, do the following: - Run `dpkg-statoverride` to set file permissions on compressed kernel (/boot/vmlinuz-*), readable to group 'nova' - Install a script which does same for each new kernel installed via system updates in the future Related-Bug: #1507915 Change-Id: Ic96b69bb80ce11001b2ee5d63324a12b0f68456d
40 lines
1.4 KiB
YAML
40 lines
1.4 KiB
YAML
---
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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- name: Find installed kernels
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find:
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paths: '/boot'
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patterns: 'vmlinuz-*'
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register: kernels
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- name: Determine latest installed kernel
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set_fact:
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latest_kernel: "{{ kernels.files | map(attribute='path') | sort(reverse=True) | first }}"
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- name: Latest kernel readable to nova group/user
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command: 'dpkg-statoverride --update --add root nova 0640 {{ latest_kernel }}'
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register: dpkg_statoverride_result
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changed_when: >
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'an override for \'{{ latest_kernel }}\' already exists; aborting'
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not in dpkg_statoverride_result.stderr
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failed_when: >
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(dpkg_statoverride_result.rc != 0) and
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('an override for \'{{ latest_kernel }}\' already exists; aborting'
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not in dpkg_statoverride_result.stderr)
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- name: Script installed to make future kernels readable to nova group/user
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copy:
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src: 'nova_kernel_permissions.sh'
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dest: '/etc/kernel/postinst.d/nova_kernel_permissions.sh'
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mode: '0755'
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