68 lines
1.9 KiB
Markdown
68 lines
1.9 KiB
Markdown
---
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layout: "docs"
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page_title: "ephemeral_disk Stanza - Job Specification"
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sidebar_current: "docs-job-specification-ephemeral_disk"
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description: |-
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The "ephemeral_disk" stanza describes the ephemeral disk requirements of the
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group. Ephemeral disks can be marked as sticky and support live data
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migrations.
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---
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# `ephemeral_disk` Stanza
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<table class="table table-bordered table-striped">
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<tr>
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<th width="120">Placement</th>
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<td>
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<code>job -> group -> **ephemeral_disk**</code>
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</td>
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</tr>
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</table>
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The `ephemeral_disk` stanza describes the ephemeral disk requirements of the
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group. Ephemeral disks can be marked as sticky and support live data migrations.
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All tasks in this group will share the same ephemeral disk.
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```hcl
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job "docs" {
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group "example" {
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ephemeral_disk {
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migrate = true
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size = "500"
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sticky = true
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}
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}
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}
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```
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## `ephemeral_disk` Parameters
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- `migrate` `(bool: false)` - Specifies that the Nomad client should make a
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best-effort attempt to migrate the data from a remote machine if placement
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cannot be made on the original node. During data migration, the task will
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block starting until the data migration has completed.
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- `size` `(int: 300)` - Specifies the size of the ephemeral disk in MB.
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- `sticky` `(bool: false)` - Specifies that Nomad should make a best-effort
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attempt to place the updated allocation on the same machine. This will move
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the `local/` and `alloc/data` directories to the new allocation.
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## `ephemeral_disk` Examples
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The following examples only show the `ephemeral_disk` stanzas. Remember that the
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`ephemeral_disk` stanza is only valid in the placements listed above.
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### Sticky Volumes
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This example shows enabling sticky volumes with Nomad using ephemeral disks:
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```hcl
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ephemeral_disk {
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sticky = true
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}
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```
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[resources]: /docs/job-specification/resources.html "Nomad resources Job Specification"
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