64 lines
2.2 KiB
YAML
64 lines
2.2 KiB
YAML
# On RAX hosts, we have a small root partition and a large,
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# unallocated ephemeral device attached at /dev/xvde
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- name: Set ephemeral device if /dev/xvde exists
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when: ansible_devices["xvde"] is defined
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set_fact:
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ephemeral_device: "/dev/xvde"
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# On other providers, we have a device called "ephemeral0".
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#
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# NOTE(ianw): Once [1] is in our ansible (2.4 era?), we can figure
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# this out more directly by walking the device labels in the facts
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#
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# [1] https://github.com/ansible/ansible/commit/d46dd99f47c0ee5081d15bc5b741e9096d8bfd3e
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- name: Set ephemeral device by label
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when: ephemeral_device is undefined
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block:
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- name: Get ephemeral0 device node
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command: /sbin/blkid -L ephemeral0
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register: ephemeral0
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# If this doesn't exist, returns !0
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ignore_errors: yes
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changed_when: False
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- name: Set ephemeral device if LABEL exists
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when: "ephemeral0.rc == 0"
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set_fact:
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ephemeral_device: "{{ ephemeral0.stdout }}"
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# If we have ephemeral storage and we don't appear to have setup swap,
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# we will create a swap and move /opt to a large data partition there.
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- include: ephemeral.yaml
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static: no
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when:
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- ephemeral_device is defined
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- ansible_memory_mb['swap']['total'] | int + 10 <= configure_swap_size
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# If no ephemeral device and no swap, then we will setup some swap
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# space on the root device to ensure all hosts a consistent memory
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# environment.
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- include: root.yaml
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static: no
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when:
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- ephemeral_device is undefined
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- ansible_memory_mb['swap']['total'] | int + 10 <= configure_swap_size
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# ensure a standard level of swappiness. Some platforms
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# (rax+centos7) come with swappiness of 0 (presumably because the
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# vm doesn't come with swap setup ... but we just did that above),
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# which depending on the kernel version can lead to the OOM killer
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# kicking in on some processes despite swap being available;
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# particularly things like mysql which have very high ratio of
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# anonymous-memory to file-backed mappings.
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#
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# This sets swappiness low; we really don't want to be relying on
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# cloud I/O based swap during our runs if we can help it
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- name: Set swappiness
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become: yes
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sysctl:
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name: vm.swappiness
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value: 30
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state: present
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- debug: var=ephemeral_device
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