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diff --git a/troubleshooting.md b/troubleshooting.md index e320f20e7..ab9fffeb3 100644 --- a/troubleshooting.md +++ b/troubleshooting.md @@ -697,3 +697,32 @@ limits. This can happen when running a container from an image for another architecture than the one you are running on. For example, if a remote repository only has, and thus send you, a `linux/arm64` _OS/ARCH_ but you run on `linux/amd64` (as happened in https://github.com/openMF/community-app/issues/3323 due to https://github.com/timbru31/docker-ruby-node/issues/564). + +### 27) `Error: failed to create sshClient: Connection to bastion host (ssh://user@host:22/run/user/.../podman/podman.sock) failed.: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain` + +In some situations where the client is not on the same machine as where the podman daemon is running the client key could be using a cipher not supported by the host. This indicates an issue with one's SSH config. Until remedied using podman over ssh +with a pre-shared key will be impossible. + +#### Symptom + +The accepted ciphers per `/etc/crypto-policies/back-ends/openssh.config` are not one that was used to create the public/private key pair that was transferred over to the host for ssh authentication. + +You can confirm this is the case by attempting to connect to the host via `podman-remote info` from the client and simultaneously on the host running `journalctl -f` and watching for the error `userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedAlgorithms [preauth]`. + +#### Solution + +Create a new key using a supported algorithm e.g. ecdsa: + +`ssh-keygen -t ecdsa -f ~/.ssh/podman` + +Then copy the new id over: + +`ssh-copy-id -i ~/.ssh/podman.pub user@host` + +And then re-add the connection (removing the old one if necessary): + +`podman-remote system connection add myuser --identity ~/.ssh/podman ssh://user@host/run/user/1000/podman/podman.sock` + +And now this should work: + +`podman-remote info` |