1130b28824
This is already used by Hydra, and is very useful when materializing a remote builder list from service discovery. This allows the service discovery tool to only sync one file instead of two.
93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
#include "store-api.hh"
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#include "remote-store.hh"
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#include "remote-fs-accessor.hh"
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#include "archive.hh"
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#include "worker-protocol.hh"
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#include "pool.hh"
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#include "ssh.hh"
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namespace nix {
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struct SSHStoreConfig : virtual RemoteStoreConfig
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{
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using RemoteStoreConfig::RemoteStoreConfig;
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const Setting<Path> sshKey{(StoreConfig*) this, "", "ssh-key", "path to an SSH private key"};
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const Setting<std::string> sshPublicHostKey{(StoreConfig*) this, "", "base64-ssh-public-host-key", "The public half of the host's SSH key"};
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const Setting<bool> compress{(StoreConfig*) this, false, "compress", "whether to compress the connection"};
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const Setting<Path> remoteProgram{(StoreConfig*) this, "nix-daemon", "remote-program", "path to the nix-daemon executable on the remote system"};
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const Setting<std::string> remoteStore{(StoreConfig*) this, "", "remote-store", "URI of the store on the remote system"};
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const std::string name() override { return "SSH Store"; }
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};
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class SSHStore : public virtual SSHStoreConfig, public virtual RemoteStore
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{
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public:
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SSHStore(const std::string & scheme, const std::string & host, const Params & params)
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: StoreConfig(params)
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, RemoteStoreConfig(params)
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, SSHStoreConfig(params)
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, Store(params)
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, RemoteStore(params)
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, host(host)
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, master(
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host,
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sshKey,
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sshPublicHostKey,
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// Use SSH master only if using more than 1 connection.
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connections->capacity() > 1,
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compress)
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{
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}
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static std::set<std::string> uriSchemes() { return {"ssh-ng"}; }
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std::string getUri() override
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{
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return *uriSchemes().begin() + "://" + host;
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}
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bool sameMachine() override
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{ return false; }
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private:
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struct Connection : RemoteStore::Connection
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{
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std::unique_ptr<SSHMaster::Connection> sshConn;
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};
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ref<RemoteStore::Connection> openConnection() override;
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std::string host;
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SSHMaster master;
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void setOptions(RemoteStore::Connection & conn) override
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{
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/* TODO Add a way to explicitly ask for some options to be
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forwarded. One option: A way to query the daemon for its
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settings, and then a series of params to SSHStore like
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forward-cores or forward-overridden-cores that only
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override the requested settings.
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*/
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};
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};
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ref<RemoteStore::Connection> SSHStore::openConnection()
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{
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auto conn = make_ref<Connection>();
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conn->sshConn = master.startCommand(
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fmt("%s --stdio", remoteProgram)
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+ (remoteStore.get() == "" ? "" : " --store " + shellEscape(remoteStore.get())));
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conn->to = FdSink(conn->sshConn->in.get());
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conn->from = FdSource(conn->sshConn->out.get());
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return conn;
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}
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static RegisterStoreImplementation<SSHStore, SSHStoreConfig> regSSHStore;
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}
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