docs: a few improvements to quickstart guide #446
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This isn't the location of the binary anyway, but the entrypoint is already set to the binary in the Dockerfile for the agent: https://github.com/parca-dev/parca-agent/blob/68dcb27ca4292ca7e7ff38a80ec22d1b0fa3fecb/Dockerfile#L6 Having the extra arg in there causes the container agent (and thus container) to bail: ``` ~ -> podman run --rm -it --privileged --pid host -p 7071:7071 -v /run:/run -v /boot:/boot -v /lib/modules:/lib/modules -v /sys/kernel/debug:/sys/kernel/debug -v /sys/fs/cgroup:/sys/fs/cgroup -v /sys/fs/bpf:/sys/fs/bpf -v /var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket ghcr.io/parca-dev/parca-agent:v0.35.3 /bin/parca-agent --remote-store-address=127.0.0.1:7070 --remote-store-insecure 2025/01/25 17:32:33 INFO memory is not limited, skipping package=github.com/KimMachineGun/automemlimit/memlimit parca-agent: error: unexpected argument /bin/parca-agent ``` Signed-off-by: TJ Hoplock <[email protected]>
As of the last release or two of the agent, the container no longer crashes on podman when run as a non-root user due to permission failure accessing `/proc/kallsyms`, but root usage should be recommended for parity with the docker equivalent's access/suggested usage. Prevents: ``` time="2025-01-25T17:30:41Z" level=error msg="Failed to load eBPF tracer: failed to read kernel symbols: all addresses from kallsyms are zero - check process permissions" ``` Signed-off-by: TJ Hoplock <[email protected]>
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Some attempted improvements. More details in each commit. Feedback welcome!