hack: Add remote lldb utilities to hack dir #596
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This is useful for remote debugging bootc running in a VM. Until podman-bootc has support for forwarding arbitrary ports, this custom solution is needed. Signed-off-by: Chris Kyrouac <ckyrouac@redhat.com>
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| #!/bin/bash | |||
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Some overlap here with #593 a bit and of course - a lot of overlap with https://github.com/containers/podman-bootc ...I was really thinking about trying to make that a more generic tool, but it gets tricky.
There's so many virtualization wrappers on Linux...
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agreed, eventually podman-bootc should provide everything needed for this, but in the meantime I just wanted to use lldb. The primary (only?) thing preventing using podman-bootc is the networking stuff.
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| net.ipv6.conf.all.disable_ipv6 = 1 | |||
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I had a weird issue where the lldb connection was trying to use the ipv6 address and failing, this fixed it. I have ipv6 turned off on my host.
| virsh -c qemu:///system destroy bootc-lldb | ||
| virsh -c qemu:///system undefine --nvram bootc-lldb | ||
| set -e | ||
| sudo virt-install --name bootc-lldb --cpu host --vcpus 8 --memory 8192 --import --disk ~/.cache/bootc-dev/disks/lldb.raw --os-variant rhel9-unknown |
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For this one we could use --qemu-commandline to pass the ssh key via credentials too right? This is probably something to do via a patch to virt-install.
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yep, I was playing around with the now defunct included-ssh-pubkey example and got it working so I just continued using it. Either way works for me.
| RUN dnf -y install lldb firewalld vim && \ | ||
| firewall-offline-cmd --add-port 1025-65535/tcp && \ |
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Hmm, interesting that you're adding firewalld here only to poke a lot of holes in the firewall...any reason for that?
(In the near future we may want to actually add firewalld to our base images though)
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firewalld is just really simple to use. I was surprised it's not in the base image. lldb uses the user defined port for the initial connection along with seemingly any random port in the 30000-* range.
This is useful for remote debugging bootc running in a VM.
Until podman-bootc has support for forwarding arbitrary ports, this custom solution is needed.
This has been working well for me and I thought it might be useful to include in the docs for others to try if they're interested.