commit
1b1164166b
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@ -6,7 +6,7 @@ freebsd_task:
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matrix:
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- OCAML_VERSION: 4.08.1
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- OCAML_VERSION: 4.09.0
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pkg_install_script: pkg install -y ocaml-opam gmp gmake pkgconf
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pkg_install_script: pkg install -y ocaml-opam gmp gmake pkgconf bash
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ocaml_script: opam init -a --comp=$OCAML_VERSION
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dependencies_script: eval `opam env` && opam install -y --deps-only .
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build_script: eval `opam env` && dune build
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@ -115,6 +115,9 @@ let add_policy _ endp cert key ca name vms memory cpus block bridges =
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let info_ _ endp cert key ca name =
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jump endp cert key ca name (`Unikernel_cmd `Unikernel_info)
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let get _ endp cert key ca name =
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jump endp cert key ca name (`Unikernel_cmd `Unikernel_get)
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let destroy _ endp cert key ca name =
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jump endp cert key ca name (`Unikernel_cmd `Unikernel_destroy)
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@ -197,6 +200,15 @@ let info_cmd =
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Term.(const info_ $ setup_log $ destination $ ca_cert $ ca_key $ server_ca $ opt_vm_name),
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Term.info "info" ~doc ~man ~exits
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let get_cmd =
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let doc = "retrieve a VM" in
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let man =
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[`S "DESCRIPTION";
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`P "Downloads a VM."]
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in
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Term.(const get $ setup_log $ destination $ ca_cert $ ca_key $ server_ca $ vm_name),
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Term.info "get" ~doc ~man ~exits
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let policy_cmd =
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let doc = "active policies" in
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let man =
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@ -300,9 +312,9 @@ let default_cmd =
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Term.(ret (const help $ setup_log $ destination $ Term.man_format $ Term.choice_names $ Term.pure None)),
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Term.info "albatross_client_bistro" ~version ~doc ~man ~exits
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let cmds = [ help_cmd ; info_cmd ;
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let cmds = [ help_cmd ;
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policy_cmd ; remove_policy_cmd ; add_policy_cmd ;
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destroy_cmd ; create_cmd ;
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info_cmd ; get_cmd ; destroy_cmd ; create_cmd ;
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block_info_cmd ; block_create_cmd ; block_destroy_cmd ;
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console_cmd ; stats_cmd ; log_cmd ]
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30
client/albatross_client_inspect_dump.ml
Normal file
30
client/albatross_client_inspect_dump.ml
Normal file
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@ -0,0 +1,30 @@
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(* (c) 2020 Hannes Mehnert, all rights reserved *)
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let jump _ name dbdir =
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Albatross_cli.set_dbdir dbdir;
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match Vmm_unix.restore ?name () with
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| Error `NoFile -> Error (`Msg "dump file not found")
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| Error (`Msg msg) -> Error (`Msg ("while reading dump file: " ^ msg))
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| Ok data -> match Vmm_asn.unikernels_of_cstruct data with
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| Error (`Msg msg) -> Error (`Msg ("couldn't parse dump file: " ^ msg))
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| Ok unikernels ->
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let all = Vmm_trie.all unikernels in
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Logs.app (fun m -> m "parsed %d unikernels:" (List.length all));
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List.iter (fun (name, unik) ->
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Logs.app (fun m -> m "%a: %a" Vmm_core.Name.pp name
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Vmm_core.Unikernel.pp_config unik))
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all;
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Ok ()
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open Cmdliner
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open Albatross_cli
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let file =
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let doc = "File to read the dump from (prefixed by dbdir if relative)" in
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Arg.(value & opt (some string) None & info [ "file" ] ~doc)
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let cmd =
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Term.(term_result (const jump $ setup_log $ file $ dbdir)),
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Term.info "albatross-client-inspect-dump" ~version
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let () = match Term.eval cmd with `Ok () -> exit 0 | _ -> exit 1
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@ -57,6 +57,9 @@ let add_policy _ opt_socket name vms memory cpus block bridges =
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let info_ _ opt_socket name =
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jump opt_socket name (`Unikernel_cmd `Unikernel_info)
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let get _ opt_socket name =
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jump opt_socket name (`Unikernel_cmd `Unikernel_get)
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let destroy _ opt_socket name =
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jump opt_socket name (`Unikernel_cmd `Unikernel_destroy)
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@ -131,6 +134,15 @@ let info_cmd =
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Term.(term_result (const info_ $ setup_log $ socket $ opt_vm_name $ tmpdir)),
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Term.info "info" ~doc ~man ~exits
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let get_cmd =
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let doc = "retrieve a VM" in
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let man =
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[`S "DESCRIPTION";
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`P "Downloads a VM."]
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in
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Term.(term_result (const get $ setup_log $ socket $ vm_name $ tmpdir)),
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Term.info "get" ~doc ~man ~exits
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let policy_cmd =
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let doc = "active policies" in
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let man =
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@ -252,9 +264,9 @@ let default_cmd =
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Term.(ret (const help $ setup_log $ socket $ Term.man_format $ Term.choice_names $ Term.pure None)),
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Term.info "albatross_client_local" ~version ~doc ~man ~exits
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let cmds = [ help_cmd ; info_cmd ;
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let cmds = [ help_cmd ;
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policy_cmd ; remove_policy_cmd ; add_policy_cmd ;
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destroy_cmd ; create_cmd ;
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info_cmd ; get_cmd ; destroy_cmd ; create_cmd ;
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block_info_cmd ; block_create_cmd ; block_destroy_cmd ;
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console_cmd ;
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stats_subscribe_cmd ; stats_add_cmd ; stats_remove_cmd ; log_cmd ]
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@ -17,4 +17,11 @@
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(public_name albatross-client-remote-tls)
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(package albatross)
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(modules albatross_client_remote_tls)
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(libraries albatross.cli albatross albatross.tls albatross_tls_cli mirage-crypto-rng.lwt))
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(libraries albatross.cli albatross albatross.tls albatross_tls_cli))
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(executable
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(name albatross_client_inspect_dump)
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(public_name albatross-client-inspect-dump)
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(package albatross)
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(modules albatross_client_inspect_dump)
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(libraries albatross.cli albatross))
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@ -60,8 +60,29 @@ type exit_status =
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let output_result ((_, reply) as wire) =
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match reply with
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| `Success _ ->
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| `Success s ->
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Logs.app (fun m -> m "%a" Vmm_commands.pp_wire wire);
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begin match s with
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| `Unikernels vms ->
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List.iter (fun (name, cfg) ->
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if Cstruct.len cfg.Unikernel.image > 0 then
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let filename =
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let ts = Ptime.to_rfc3339 (Ptime_clock.now ()) in
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Fpath.(v (Filename.get_temp_dir_name ()) / Name.to_string name + ts)
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in
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let write data =
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match Bos.OS.File.write filename data with
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| Ok () -> Logs.app (fun m -> m "dumped image to %a" Fpath.pp filename)
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| Error (`Msg msg) -> Logs.err (fun m -> m "failed to write image: %s" msg)
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in
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if cfg.Unikernel.compressed then
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match Vmm_compress.uncompress (Cstruct.to_string cfg.Unikernel.image) with
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| Ok blob -> write blob
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| Error () -> Logs.err (fun m -> m "failed to uncompress unikernel image")
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else
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write (Cstruct.to_string cfg.Unikernel.image)) vms
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| _ -> ()
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end;
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Ok ()
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| `Data _ ->
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Logs.app (fun m -> m "%a" Vmm_commands.pp_wire wire);
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@ -42,7 +42,8 @@ install -U $bdir/stats/albatross_stat_client.exe $sbindir/albatross_stat_client
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for f in albatross_client_local \
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albatross_client_remote_tls \
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albatross_client_bistro
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albatross_client_bistro \
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albatross_client_inspect_dump
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do install -U $bdir/client/$f.exe $sbindir/$f; done
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for f in albatross_provision_ca albatross_provision_request; do
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@ -35,6 +35,8 @@ let add_policy _ name vms memory cpus block bridges =
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let info_ _ name = jump name (`Unikernel_cmd `Unikernel_info)
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let get _ name = jump name (`Unikernel_cmd `Unikernel_get)
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let destroy _ name =
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jump name (`Unikernel_cmd `Unikernel_destroy)
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@ -96,6 +98,15 @@ let info_cmd =
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Term.(term_result (const info_ $ setup_log $ opt_vm_name)),
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Term.info "info" ~doc ~man
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let get_cmd =
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let doc = "retrieve a VM" in
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let man =
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[`S "DESCRIPTION";
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`P "Downloads a VM."]
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in
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Term.(term_result (const get $ setup_log $ vm_name)),
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Term.info "get" ~doc ~man ~exits
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let policy_cmd =
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let doc = "active policies" in
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let man =
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@ -199,9 +210,9 @@ let default_cmd =
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Term.(ret (const help $ setup_log $ Term.man_format $ Term.choice_names $ Term.pure None)),
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Term.info "albatross_provision_request" ~version ~doc ~man
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let cmds = [ help_cmd ; info_cmd ;
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let cmds = [ help_cmd ;
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policy_cmd ; remove_policy_cmd ; add_policy_cmd ;
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destroy_cmd ; create_cmd ;
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info_cmd ; get_cmd ; destroy_cmd ; create_cmd ;
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block_info_cmd ; block_create_cmd ; block_destroy_cmd ;
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console_cmd ; stats_cmd ; log_cmd ]
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133
src/vmm_asn.ml
133
src/vmm_asn.ml
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@ -1,5 +1,86 @@
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(* (c) 2017, 2018 Hannes Mehnert, all rights reserved *)
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(* please read this before changing this module:
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Data encoded by this module is persisted in (a) log entry (b) dump file
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(c) certificates (and subCA). It is important to be aware of backward and
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forward compatibility when modifying this module. There are various version
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fields around which are mostly useless in retrospect. On a server deployment,
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upgrades are supported while downgrades are not (there could be a separate
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tool reading newer data and dumping it for older albatross versions). The
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assumption is that a server deployment moves forward. For the clients, older
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clients should best be support smoothly, or an error from the server should
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be issued informing about a too old version. Clients which support newer
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wire version should as well be notified (it may be suitable to have a
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--use-version command-line flag - so new clients can talk to old servers).
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The log (a) is append-only, whenever a new log entry is added, the choice
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log_entry should be extended. New entries just use the new choice. The dump
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on disk (dumped via log_to_disk, restored logs_of_disk) prepends a (rather
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useless) version field. Restoring a new log entry with an old albatross_log
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will result in a warning (but restores the other log entries).
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It should be ensured that old unikernels dumped to disk (b) can be read by
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new albatross daemons. The functions unikernels_to_cstruct and
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unikernels_of_cstruct are used for dump and restore, each an explicit choice.
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They use the trie of unikernel_config, dump always uses the latest version in
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the explicit choice. There's no version field involved.
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The data in transit (certificates and commands) is out of control of a single
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operator. This means that best effort should be done to support old clients
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(and old servers - eventually with a command-line argument --use-version). If
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a server receives a command (via TLS cert_extension), this is prefixed by a
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version. The non-TLS command is a sequence of header and payload, where the
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header includes a version. At the moment, the commands are all explicit
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choices, adding new ones by extending the choice works in a
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backwards-compatible way.
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*)
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(* The version field could be used (at the moment, decoding a newer version
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leads to a decoding failure):
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Now, to achieve version-dependent parsing, what is missing is a way to decode
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the first element of a sequence only (i.e. treat the second element as
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"any"). This is something missing for PKCS12 from the asn1 library. A
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"quick hack" is to extract length information of the first element, and use
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that decoder on the sub-buffer. The following implements this.
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let seq_hd cs =
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(* we assume a ASN.1 DER/BER encoded sequence starting in cs:
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- 0x30
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- length (definite length field - not 0x80)
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- <data> (of length length)
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retrieve data to decode only the first element: <data>, which is cs offset
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(at least 2, 0x30 0xLL), and length encoded before
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*)
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guard (Cstruct.len cs > 2) (`Msg "too short") >>= fun () ->
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guard (Cstruct.get_uint8 cs 0 = 0x30) (`Msg "not a sequence") >>= fun () ->
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let l1 = Cstruct.get_uint8 cs 1 in
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(if l1 < 0x80 then
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Ok (2, l1)
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else if l1 = 0x80 then
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Error (`Msg "indefinite length")
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else
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let octets = l1 land 0x7F in
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guard (Cstruct.len cs > octets + 2) (`Msg "data too short") >>= fun () ->
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let rec go off acc =
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if off = octets then
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Ok (2 + octets, acc)
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else
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go (succ off) (Cstruct.get_uint8 cs (off + 2) + acc lsl 8)
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in
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go 0 0) >>= fun (off, l) ->
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guard (Cstruct.len cs >= l + off) (`Msg "buffer too small") >>= fun () ->
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Ok (Cstruct.sub cs off l)
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let decode_version cs =
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let c = Asn.codec Asn.der version in
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match Asn.decode c cs with
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| Ok (a, _) -> Ok a
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| Error (`Parse msg) -> Error (`Msg msg)
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*)
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open Vmm_core
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open Vmm_commands
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@ -280,7 +361,7 @@ let log_event =
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(sequence2
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(required ~label:"name" utf8_string)
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(required ~label:"device" utf8_string))))))
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(explicit 7 null)))
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(explicit 7 null (* placeholder *) )))
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let log_cmd =
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@ -356,13 +437,7 @@ let v0_unikernel_config =
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and fail_behaviour = `Quit (* TODO maybe set to restart by default :) *)
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in
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{ typ ; compressed ; image ; fail_behaviour ; cpuid ; memory ; block_devices ; bridges ; argv }
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and g vm =
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let network_interfaces = match vm.bridges with [] -> None | xs -> Some (List.map fst xs)
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and block_device = match vm.block_devices with [] -> None | x::_ -> Some x
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and typ = if vm.compressed then `Hvt_amd64_compressed else `Hvt_amd64
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in
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let image = typ, vm.image in
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(vm.cpuid, vm.memory, block_device, network_interfaces, image, vm.argv)
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and g _vm = failwith "cannot encode v0 unikernel configs"
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in
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Asn.S.map f g @@
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Asn.S.(sequence6
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|
@ -373,7 +448,6 @@ let v0_unikernel_config =
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(required ~label:"image" image)
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(optional ~label:"arguments" (sequence_of utf8_string)))
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(* this is part of the state file (and unikernel_create command)
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be aware if this (or a dependent grammar) is changed! *)
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let v1_unikernel_config =
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|
@ -383,11 +457,7 @@ let v1_unikernel_config =
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and block_devices = match blocks with None -> [] | Some xs -> xs
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in
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{ typ ; compressed ; image ; fail_behaviour ; cpuid ; memory ; block_devices ; bridges ; argv }
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and g vm =
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let bridges = match vm.bridges with [] -> None | xs -> Some (List.map fst xs)
|
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and blocks = match vm.block_devices with [] -> None | xs -> Some xs
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in
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(vm.typ, (vm.compressed, (vm.image, (vm.fail_behaviour, (vm.cpuid, (vm.memory, (blocks, (bridges, vm.argv))))))))
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and g _vm = failwith "cannot encode v1 unikernel configs"
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in
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Asn.S.(map f g @@ sequence @@
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(required ~label:"typ" typ)
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|
@ -430,26 +500,33 @@ let unikernel_config =
|
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let unikernel_cmd =
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let f = function
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| `C1 () -> `Unikernel_info
|
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| `C2 vm -> `Unikernel_create vm
|
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| `C3 vm -> `Unikernel_force_create vm
|
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| `C4 () -> `Unikernel_destroy
|
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| `C5 vm -> `Unikernel_create vm
|
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| `C6 vm -> `Unikernel_force_create vm
|
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| `C1 `C1 () -> `Unikernel_info
|
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| `C1 `C2 vm -> `Unikernel_create vm
|
||||
| `C1 `C3 vm -> `Unikernel_force_create vm
|
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| `C1 `C4 () -> `Unikernel_destroy
|
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| `C1 `C5 vm -> `Unikernel_create vm
|
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| `C1 `C6 vm -> `Unikernel_force_create vm
|
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| `C2 `C1 () -> `Unikernel_get
|
||||
| `C2 `C2 () -> assert false (* placeholder *)
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and g = function
|
||||
| `Unikernel_info -> `C1 ()
|
||||
| `Unikernel_create vm -> `C5 vm
|
||||
| `Unikernel_force_create vm -> `C6 vm
|
||||
| `Unikernel_destroy -> `C4 ()
|
||||
| `Unikernel_info -> `C1 (`C1 ())
|
||||
| `Unikernel_create vm -> `C1 (`C5 vm)
|
||||
| `Unikernel_force_create vm -> `C1 (`C6 vm)
|
||||
| `Unikernel_destroy -> `C1 (`C4 ())
|
||||
| `Unikernel_get -> `C2 (`C1 ())
|
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in
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Asn.S.map f g @@
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Asn.S.(choice6
|
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Asn.S.(choice2
|
||||
(choice6
|
||||
(explicit 0 null)
|
||||
(explicit 1 v1_unikernel_config)
|
||||
(explicit 2 v1_unikernel_config)
|
||||
(explicit 3 null)
|
||||
(explicit 4 unikernel_config)
|
||||
(explicit 5 unikernel_config))
|
||||
(choice2
|
||||
(explicit 6 null)
|
||||
(explicit 7 null (* placeholder *) )))
|
||||
|
||||
let policy_cmd =
|
||||
let f = function
|
||||
|
@ -621,9 +698,9 @@ let log_entry =
|
|||
|
||||
let log_entry_of_cstruct, log_entry_to_cstruct = projections_of log_entry
|
||||
|
||||
(* data is persisted to disk, we need to ensure to be able to decode (and
|
||||
encode) properly without conflicts! *)
|
||||
let log_disk =
|
||||
(* data is persisted to disk, we need to ensure to be able to decode (and
|
||||
encode) properly without conflicts! *)
|
||||
Asn.S.(sequence2
|
||||
(required ~label:"version" version)
|
||||
(required ~label:"entry" log_entry))
|
||||
|
@ -689,6 +766,8 @@ let unikernels =
|
|||
let unikernels_of_cstruct, unikernels_to_cstruct = projections_of unikernels
|
||||
|
||||
let cert_extension =
|
||||
(* note that subCAs are deployed out there, thus modifying the encoding of
|
||||
commands may break them. *)
|
||||
Asn.S.(sequence2
|
||||
(required ~label:"version" version)
|
||||
(required ~label:"command" wire_command))
|
||||
|
|
|
@ -61,6 +61,7 @@ type unikernel_cmd = [
|
|||
| `Unikernel_create of Unikernel.config
|
||||
| `Unikernel_force_create of Unikernel.config
|
||||
| `Unikernel_destroy
|
||||
| `Unikernel_get
|
||||
]
|
||||
|
||||
let pp_unikernel_cmd ppf = function
|
||||
|
@ -68,6 +69,7 @@ let pp_unikernel_cmd ppf = function
|
|||
| `Unikernel_create config -> Fmt.pf ppf "unikernel create %a" Unikernel.pp_config config
|
||||
| `Unikernel_force_create config -> Fmt.pf ppf "vm force create %a" Unikernel.pp_config config
|
||||
| `Unikernel_destroy -> Fmt.string ppf "unikernel destroy"
|
||||
| `Unikernel_get -> Fmt.string ppf "unikernel get"
|
||||
|
||||
type policy_cmd = [
|
||||
| `Policy_info
|
||||
|
|
|
@ -35,6 +35,7 @@ type unikernel_cmd = [
|
|||
| `Unikernel_create of Unikernel.config
|
||||
| `Unikernel_force_create of Unikernel.config
|
||||
| `Unikernel_destroy
|
||||
| `Unikernel_get
|
||||
]
|
||||
|
||||
type policy_cmd = [
|
||||
|
|
|
@ -96,16 +96,22 @@ let close_no_err fd = try close fd with _ -> ()
|
|||
|
||||
let dump, restore =
|
||||
let open R.Infix in
|
||||
(fun data ->
|
||||
let state_file = Fpath.(!dbdir / "state") in
|
||||
let state_file ?(name = "state") () =
|
||||
if Fpath.is_seg name then
|
||||
Fpath.(!dbdir / name)
|
||||
else
|
||||
Fpath.v name
|
||||
in
|
||||
(fun ?name data ->
|
||||
let state_file = state_file ?name () in
|
||||
Bos.OS.File.exists state_file >>= fun exists ->
|
||||
(if exists then begin
|
||||
let bak = Fpath.(state_file + "bak") in
|
||||
Bos.OS.U.(error_to_msg @@ rename state_file bak)
|
||||
end else Ok ()) >>= fun () ->
|
||||
Bos.OS.File.write state_file (Cstruct.to_string data)),
|
||||
(fun () ->
|
||||
let state_file = Fpath.(!dbdir / "state") in
|
||||
(fun ?name () ->
|
||||
let state_file = state_file ?name () in
|
||||
Bos.OS.File.exists state_file >>= fun exists ->
|
||||
if exists then
|
||||
Bos.OS.File.read state_file >>| fun data ->
|
||||
|
|
|
@ -30,8 +30,8 @@ val destroy_block : Name.t -> (unit, [> R.msg ]) result
|
|||
|
||||
val find_block_devices : unit -> ((Name.t * int) list, [> R.msg ]) result
|
||||
|
||||
val dump : Cstruct.t -> (unit, [> R.msg ]) result
|
||||
val dump : ?name:string -> Cstruct.t -> (unit, [> R.msg ]) result
|
||||
|
||||
val restore : unit -> (Cstruct.t, [> R.msg | `NoFile ]) result
|
||||
val restore : ?name:string -> unit -> (Cstruct.t, [> R.msg | `NoFile ]) result
|
||||
|
||||
val vm_device : Unikernel.t -> (string, [> R.msg ]) result
|
||||
|
|
|
@ -236,6 +236,13 @@ let handle_unikernel_cmd t id = function
|
|||
| _ ->
|
||||
Ok (t, `End (`Success (`Unikernels vms)))
|
||||
end
|
||||
| `Unikernel_get ->
|
||||
Logs.debug (fun m -> m "get %a" Name.pp id) ;
|
||||
begin match Vmm_trie.find id t.resources.Vmm_resources.unikernels with
|
||||
| None -> Error (`Msg "get: no unikernel found")
|
||||
| Some u ->
|
||||
Ok (t, `End (`Success (`Unikernels [ (id, u.Unikernel.config) ])))
|
||||
end
|
||||
| `Unikernel_create vm_config -> Ok (t, `Create (id, vm_config))
|
||||
| `Unikernel_force_create vm_config ->
|
||||
begin
|
||||
|
|
4
tls/dune
4
tls/dune
|
@ -16,11 +16,11 @@
|
|||
(public_name albatross-tls-endpoint)
|
||||
(package albatross)
|
||||
(modules albatross_tls_endpoint)
|
||||
(libraries albatross_cli albatross_tls_cli albatross mirage-crypto-rng.lwt))
|
||||
(libraries albatross_cli albatross_tls_cli albatross))
|
||||
|
||||
(executable
|
||||
(name albatross_tls_inetd)
|
||||
(public_name albatross-tls-inetd)
|
||||
(package albatross)
|
||||
(modules albatross_tls_inetd)
|
||||
(libraries albatross_cli albatross_tls_cli albatross mirage-crypto-rng.lwt))
|
||||
(libraries albatross_cli albatross_tls_cli albatross))
|
||||
|
|
Loading…
Reference in a new issue