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implement new ssh interface into podman
this completely redesigns the entire functionality of podman image scp,
podman system connection add, and podman --remote. All references to golang.org/x/crypto/ssh
have been moved to common as have native ssh/scp execs and the new usage of the sftp package.
this PR adds a global flag, --ssh to podman which has two valid inputs `golang` and `native` where golang is the default.
Users should not notice any difference in their everyday workflows if they continue using the golang option. UNLESS they have been using an improperly verified ssh key, this will now fail. This is because podman was incorrectly using the
ssh callback method to IGNORE the ssh known hosts file which is very insecure and golang tells you not yo use this in production.
The native paths allows for immense flexibility, with a new containers.conf field `SSH_CONFIG` that specifies a specific ssh config file to be used in all operations. Else the users ~/.ssh/config file will be used.
podman --remote currently only uses the golang path, given its deep interconnection with dialing multiple clients and urls.
My goal after this PR is to go back and abstract the idea of podman --remote from golang's dialed clients, as it should not be so intrinsically connected. Overall, this is a v1 of a long process of offering native ssh, and one that covers some good ground with podman system connection add and podman image scp.
Signed-off-by: Charlie Doern <cdoern@redhat.com>
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add support for podman-remote image scp as well as direct access via the API. This entailed
a full rework of the layering of image scp functions as well as the usual API plugging and type creation
also, implemented podman image scp tagging. which makes the syntax much more readable and allows users t tag the new image
they are loading to the local/remote machine:
allow users to pass a "new name" for the image they are transferring
`podman tag` as implemented creates a new image im `image list` when tagging, so this does the same
meaning that when transferring images with tags, podman on the remote machine/user will load two images
ex: `podman image scp computer1::alpine computer2::foobar` creates alpine:latest and localhost/foobar on the remote host
implementing tags means removal of the flexible syntax. In the currently released podman image scp, the user can either specify
`podman image scp source::img dest::` or `podman image scp dest:: source::img`. However, with tags this task becomes really hard to check
which is the image (src) and which is the new tag (dst). Removal of that streamlines the arg parsing process
Signed-off-by: Charlie Doern <cdoern@redhat.com>
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podman image scp and podman system connection tests were querying an existing website during testing.
Change to a URL that will never exist given an improper domain extension
also just generally clean up a few things in both scp and connection testing
resolves #14699
Signed-off-by: Charlie Doern <cdoern@redhat.com>
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This is a very late followup to my ginkgo-improving work of 2021.
It has been stuck since December because it requires gomega 1.17,
which we've just enabled.
This commit is simply a copy-paste of a command I saved in
my TODO list many months ago:
sed -i -e 's/Expect(\([^ ]\+\)\.\([a-zA-Z0-9]\+\))\.To(Equal(/Expect(\1).To(HaveField(\"\2\", /' test/e2e/*_test.go
Signed-off-by: Ed Santiago <santiago@redhat.com>
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Automated for .go files via gomove [1]:
`gomove github.com/containers/podman/v3 github.com/containers/podman/v4`
Remaining files via vgrep [2]:
`vgrep github.com/containers/podman/v3`
[1] https://github.com/KSubedi/gomove
[2] https://github.com/vrothberg/vgrep
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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Podman image scp should never enter the Podman UserNS unless it needs to. This allows for
a sudo exec.Command to transfer images to and from rootful storage. If this command is run using sudo,
the simple sudo podman save/load does not work, machinectl/su is necessary here.
This modification allows for both rootful and rootless transfers, and an overall change of scp to be
more of a wrapper function for different load and save calls as well as the ssh component
Signed-off-by: cdoern <cdoern@redhat.com>
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sed -i -e 's/Expect(\(.*\)\[\(\".*\"\)\])\.To(Equal(/Expect(\1).To(HaveKeyWithValue(\2, /' test/e2e/*_test.go
...with two manual tweaks, because this converted:
Expect(foo["bar"]).To(Equal(""))
-> Expect(foo).To(HaveKeyWithValue("bar",""))
It looks like the intention of the test was, instead:
...To(Not(HaveKey("bar")))
Signed-off-by: Ed Santiago <santiago@redhat.com>
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...and fix problems found therewith.
Signed-off-by: Ed Santiago <santiago@redhat.com>
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Many ginkgo tests have been written to use this evil form:
GrepString("foo")
Expect(that to BeTrue())
...which yields horrible useless messages on failure:
false is not true
Identify those (automatically, via script) and convert to:
Expect(output to ContainSubstring("foo"))
...which yields:
"this output" does not contain substring "foo"
There are still many BeTrue()s left. This is just a start.
This is commit 1 of 2. It includes the script I used, and
all changes to *.go are those computed by the script.
Commit 2 will apply some manual fixes.
Signed-off-by: Ed Santiago <santiago@redhat.com>
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Fixed syntax so that podman image scp transfer works with no user specified.
This command can only be executed as root so to obtain the default user, I searched for
the SUDO_USER environmental variable. If that is not found, we error out and inform the user
to set this variable and make sure they are running as root
Signed-off-by: cdoern <cdoern@redhat.com>
Signed-off-by: cdoern <cbdoer23@g.holycross.edu>
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Added functionality for users to transfer images from root storage to rootless storage without using sshd. This is
done through rootful podman by running `sudo podman image scp root@localhost::image user@localhost:: the user is needed
in order to find and use their uid/gid to exec a new process.
added necessary tests, and functions for this implementation. Created new image function Transfer so that
the underlying code is majorly removed from CLI
Signed-off-by: cdoern <cdoern@redhat.com>
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added functionality for image secure copying from local to remote.
Also moved system connection add code around a bit so functions within that file
can be used by scp.
Signed-off-by: cdoern <cdoern@redhat.com>
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