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Add Juniper ISSU and NSSU support #400

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Add Juniper ISSU and NSSU support #400

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af95c66
Add issu and nssu support flags
mattmiller87 Jun 30, 2026
a4321e8
Add request_system_snapshot and wait_for_system_snapshot
mattmiller87 Jul 6, 2026
ff4f8a5
Update to install os on multiple devices without nssu
mattmiller87 Jul 7, 2026
c1db014
Add post-install re_info validation for OS upgrades
mattmiller87 Jul 7, 2026
43bb7c6
Update install logic for multiple devices
mattmiller87 Jul 8, 2026
ee87f79
post ntc-review comments
mattmiller87 Jul 8, 2026
a49fb86
update to juniper remote_file_copy for virtual chassis
jtdub Jul 8, 2026
f3e1369
update jnpr remote file copy based on testing
jtdub Jul 8, 2026
63f6afe
bump wait_for_snapshot timeout
jtdub Jul 8, 2026
ba74f2e
update parser for post upgrade parser
jtdub Jul 9, 2026
aed1b2d
updates per review
jtdub Jul 9, 2026
c9d02e5
fixes per copilot comments
jtdub Jul 9, 2026
f50b8a9
bump default snapshot timeout to 3600 and extract install_os reboot p…
jtdub Jul 9, 2026
39e6559
make taking a snapshot optional
jtdub Jul 9, 2026
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2 changes: 2 additions & 0 deletions changes/400.added
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Original file line number Diff line number Diff line change
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Added support for ISSU and NSSU non-disruptive OS upgrades on Juniper devices.
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jtdub marked this conversation as resolved.
Added a `snapshot` option to `JunosDevice.install_os` that takes a post-upgrade `request system snapshot slice alternate` and waits for completion; disabled by default because Junos does not require a snapshot to complete an upgrade.
5 changes: 5 additions & 0 deletions changes/400.fixed
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Fixed `JunosDevice._get_free_space` raising `FileSystemNotFoundError` on virtual-chassis, multi-RE, and cluster devices; the smallest member's free space is now returned.
Fixed `JunosDevice.remote_file_copy` discarding the device's actual error message on a failed copy; the underlying error is now included in the raised `FileTransferError`.
Fixed `JunosDevice.remote_file_copy` failing with "filesystem is full" on small-flash platforms (e.g., EX switches); remote images are now downloaded directly to the destination path instead of being staged in the user's home directory on `/var`.
Fixed `JunosDevice` post-install version verification failing on platforms whose `show version` output has no "JUNOS Base OS Software Suite" line (e.g., EX switches on 15.1).
Fixed `JunosDevice.install_os` issuing a disruptive full-chassis reboot after an NSSU/ISSU upgrade, which already reboots each member in service during the install.
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