scripts: stop the guest tmpfs from starving the target - #196
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The Nyx guest has no disk: /tmp is a tmpfs that must hold the container tarball, the tree extracted from it, and every byte the target writes at runtime. Its default cap is half the VM's RAM, so unpacking a 600 MB image needs a 3 GB VM; below that, tar fails with ENOSPC and the agent aborts with an empty message that says nothing about what went wrong.
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The Nyx guest has no disk: /tmp is a tmpfs that must hold the container tarball, the tree extracted from it, and every byte the target writes at runtime. Its default cap is half the VM's RAM, so unpacking a 600 MB image needs a 3 GB VM; below that, tar fails with ENOSPC and the agent aborts with an empty message that says nothing about what went wrong.
Partially address #195