vagrant-resume

Resume machine specified by name or id

$ vagrant resume [name|id]

$ vagrant resume [name|id] --provision

$ vagrant resume [name|id] --provision-with [provisioner]

vagrant resume [<name> | <id>] [--provision] [--debug]

<name> | <id>
    Optional. Specifies the name or UUID of the virtual machine to resume. If omitted, Vagrant attempts to resume the primary VM in the current Vagrantfile directory.

--provision
    Optional. Forces Vagrant to run the configured provisioners after resuming the machine. By default, provisioning is not run during resume.

--debug
    Optional. Enables debug-level logging for detailed output, useful for troubleshooting issues with the resume process.

The vagrant resume command reactivates a suspended Vagrant environment. When a Vagrant machine is suspended using vagrant suspend, its current state, including RAM and CPU state, is saved to disk. This allows for a quick restart without going through a full boot process.

vagrant resume loads this saved state, bringing the virtual machine back to exactly where it left off. This is particularly useful for quickly pausing and unpausing development environments, saving host resources without losing work context. It's an efficient way to manage the lifecycle of a development VM, offering a faster alternative to performing a vagrant halt followed by a vagrant up, as it preserves the exact runtime state.

Resuming may fail if the underlying virtualization provider's configuration or host system environment has changed significantly since suspension.
Resource Consumption: Can consume a significant amount of host RAM upon resume, equivalent to the VM's configured memory.
Provider Support: Not all virtualization providers fully support the suspend/resume feature.
Pre-condition: The command is only effective if the machine was previously suspended using vagrant suspend. If it was halted or powered off, vagrant up is required.

When you execute vagrant suspend, the entire operational state of the virtual machine—including its RAM contents, CPU registers, and connected device states—is captured and written to a file on the host's disk. Subsequently, vagrant resume reads this saved state file back into memory, effectively restoring the VM to its exact previous operational state without the need for a full boot sequence, resulting in a much faster startup time.

While a virtual machine is suspended, it consumes no CPU cycles, which conserves host processing power. However, the saved state file created during suspension can occupy a significant amount of disk space, typically proportional to the VM's configured RAM. Upon resumption, this configured RAM is then re-allocated and consumed by the virtual machine on the host system.

Vagrant, created by Mitchell Hashimoto, first saw its public release in 2010. The suspend and resume functionality has been a foundational element of Vagrant's lifecycle management capabilities since its early versions. This feature allows users to efficiently pause and unpause their development environments, leveraging the underlying virtualization provider's snapshot and suspend mechanisms. It quickly became an indispensable tool for optimizing resource management and facilitating rapid context switching in modern development workflows.

vagrant suspend, vagrant halt, vagrant up, vagrant status, vagrant global-status