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Parallelize the SSH integration tests across OS targets and reduce
per-container overhead:
- CI: use GitHub Actions matrix strategy to run all 4 OS containers
(ubuntu:focal, ubuntu:jammy, ubuntu:noble, alpine:latest) in parallel
instead of sequentially (~4x wall-clock improvement)
- Makefile: run docker builds in parallel for local dev too
- Dockerfile: consolidate ~20 separate RUN commands into 5 (one per
test phase), eliminating Docker layer overhead. Combine test binary
invocations where no state mutation is needed between them. Fix a bug
where TestDoDropPrivileges was silently not being run (was passed as a
second positional arg to -test.run instead of using regex alternation).
- TestMain: replace tail -F + 2s sleep with synchronous log read,
eliminating 2s overhead per test binary invocation. Set debugTest once
in TestMain instead of redundantly in each test function.
- session.read(): close channel on EOF so non-shell tests return
immediately instead of waiting for the 1s silence timeout.
Updates #19244
Change-Id: I2cc8588964fbce0dd7b654fb94e7ff33440b8584
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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Brings in a newer version of Gliderlabs SSH with added socket forwarding support.
Fixes #12409
Fixes #5295
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
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Some clients don't request 'none' authentication. Instead, they immediately supply
a password or public key. This change allows them to do so, but ignores the supplied
credentials and authenticates using Tailscale instead.
Updates #14922
Signed-off-by: Percy Wegmann <percy@tailscale.com>
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and possible
Instead of changing the working directory before launching the incubator process,
this now just changes the working directory after dropping privileges, at which
point we're more likely to be able to enter the user's home directory since we're
running as the user.
For paths that use the 'login' or 'su -l' commands, those already take care of changing
the working directory to the user's home directory.
Fixes #13120
Signed-off-by: Percy Wegmann <percy@tailscale.com>
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This involved the following:
1. Pass the su command path as first of args in call to unix.Exec to make sure that busybox sees the correct program name.
Busybox is a single executable userspace that implements various core userspace commands in a single binary. You'll
see it used via symlinking, so that for example /bin/su symlinks to /bin/busybox. Busybox knows that you're trying
to execute /bin/su because argv[0] is '/bin/su'. When we called unix.Exec, we weren't including the program name for
argv[0], which caused busybox to fail with 'applet not found', meaning that it didn't know which command it was
supposed to run.
2. Tell su to whitelist the SSH_AUTH_SOCK environment variable in order to support ssh agent forwarding.
3. Run integration tests on alpine, which uses busybox.
4. Increment CurrentCapabilityVersion to allow turning on SSH V2 behavior from control.
Fixes #12849
Signed-off-by: Percy Wegmann <percy@tailscale.com>
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This allows the SSH_AUTH_SOCK environment variable to work inside of
su and agent forwarding to succeed.
Fixes #12467
Signed-off-by: Percy Wegmann <percy@tailscale.com>
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Checking in the incubator as this used to do fails because
the getenforce command is not on the PATH.
Updates #12442
Signed-off-by: Percy Wegmann <percy@tailscale.com>
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This allows pam authentication to run for ssh sessions, triggering
automation like pam_mkhomedir.
Updates #11854
Signed-off-by: Percy Wegmann <percy@tailscale.com>
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Updates tailscale/corp#11854
Signed-off-by: Percy Wegmann <percy@tailscale.com>
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