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Diffstat (limited to '')
| -rw-r--r-- | src/tools/rbd/action/Migration.cc | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/src/tools/rbd/action/Migration.cc b/src/tools/rbd/action/Migration.cc new file mode 100644 index 000000000..1ce6201d9 --- /dev/null +++ b/src/tools/rbd/action/Migration.cc @@ -0,0 +1,429 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "include/compat.h" +#include "common/errno.h" +#include "common/safe_io.h" + +#include "tools/rbd/ArgumentTypes.h" +#include "tools/rbd/Shell.h" +#include "tools/rbd/Utils.h" + +#include <sys/types.h> +#include <fcntl.h> +#include <iostream> +#include <boost/program_options.hpp> + +namespace rbd { +namespace action { +namespace migration { + +namespace at = argument_types; +namespace po = boost::program_options; + +static int do_execute(librados::IoCtx& io_ctx, const std::string &image_name, + bool no_progress) { + utils::ProgressContext pc("Image migration", no_progress); + int r = librbd::RBD().migration_execute_with_progress(io_ctx, + image_name.c_str(), pc); + if (r < 0) { + pc.fail(); + std::cerr << "rbd: migration failed: " << cpp_strerror(r) << std::endl; + return r; + } + pc.finish(); + return 0; +} + +static int do_abort(librados::IoCtx& io_ctx, const std::string &image_name, + bool no_progress) { + utils::ProgressContext pc("Abort image migration", no_progress); + int r = librbd::RBD().migration_abort_with_progress(io_ctx, + image_name.c_str(), pc); + if (r < 0) { + pc.fail(); + std::cerr << "rbd: aborting migration failed: " << cpp_strerror(r) + << std::endl; + return r; + } + pc.finish(); + return 0; +} + +static int do_commit(librados::IoCtx& io_ctx, const std::string &image_name, + bool force, bool no_progress) { + librbd::image_migration_status_t migration_status; + int r = librbd::RBD().migration_status(io_ctx, image_name.c_str(), + &migration_status, + sizeof(migration_status)); + if (r < 0) { + std::cerr << "rbd: getting migration status failed: " << cpp_strerror(r) + << std::endl; + return r; + } + + librados::IoCtx dst_io_ctx; + r = librados::Rados(io_ctx).ioctx_create2(migration_status.dest_pool_id, dst_io_ctx); + if (r < 0) { + std::cerr << "rbd: accessing source pool id=" + << migration_status.dest_pool_id << " failed: " + << cpp_strerror(r) << std::endl; + return r; + } + + r = utils::set_namespace(migration_status.dest_pool_namespace, &dst_io_ctx); + if (r < 0) { + return r; + } + + librbd::Image image; + r = utils::open_image_by_id(dst_io_ctx, migration_status.dest_image_id, + true, &image); + if (r < 0) { + return r; + } + + std::vector<librbd::linked_image_spec_t> children; + r = image.list_descendants(&children); + if (r < 0) { + std::cerr << "rbd: listing descendants failed: " << cpp_strerror(r) + << std::endl; + return r; + } + + if (children.size() > 0) { + std::cerr << "rbd: the image has " + << (children.size() == 1 ? "a descendant" : "descendants") << ": " + << std::endl; + for (auto& child : children) { + std::cerr << " " << child.pool_name << "/"; + if (!child.pool_namespace.empty()) { + std::cerr << child.pool_namespace << "/"; + } + std::cerr << child.image_name; + if (child.trash) { + std::cerr << " (trash " << child.image_id << ")"; + } + std::cerr << std::endl; + } + std::cerr << "Warning: in-use, read-only descendant images" + << " will not detect the parent update." << std::endl; + if (force) { + std::cerr << "Proceeding anyway due to force flag set." << std::endl; + } else { + std::cerr << "Ensure no descendant images are opened read-only" + << " and run again with force flag." << std::endl; + return -EBUSY; + } + } + + utils::ProgressContext pc("Commit image migration", no_progress); + r = librbd::RBD().migration_commit_with_progress(io_ctx, image_name.c_str(), + pc); + if (r < 0) { + pc.fail(); + std::cerr << "rbd: committing migration failed: " << cpp_strerror(r) + << std::endl; + return r; + } + pc.finish(); + return 0; +} + +void get_prepare_arguments(po::options_description *positional, + po::options_description *options) { + options->add_options() + ("import-only", po::bool_switch(), "only import data from source") + ("source-spec-path", po::value<std::string>(), + "source-spec file (or '-' for stdin)") + ("source-spec", po::value<std::string>(), + "source-spec"); + at::add_image_or_snap_spec_options(positional, options, + at::ARGUMENT_MODIFIER_SOURCE); + at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_DEST); + at::add_create_image_options(options, true); + at::add_flatten_option(options); +} + +int execute_prepare(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { + bool import_only = vm["import-only"].as<bool>(); + + size_t arg_index = 0; + std::string pool_name; + std::string namespace_name; + std::string image_name; + std::string snap_name; + int r = utils::get_pool_image_snapshot_names( + vm, at::ARGUMENT_MODIFIER_SOURCE, &arg_index, &pool_name, &namespace_name, + &image_name, import_only ? &snap_name : nullptr, true, + import_only ? utils::SNAPSHOT_PRESENCE_PERMITTED : + utils::SNAPSHOT_PRESENCE_NONE, + utils::SPEC_VALIDATION_NONE); + if (r < 0) { + return r; + } + + std::string dst_pool_name; + std::string dst_namespace_name; + std::string dst_image_name; + r = utils::get_pool_image_snapshot_names( + vm, at::ARGUMENT_MODIFIER_DEST, &arg_index, &dst_pool_name, + &dst_namespace_name, &dst_image_name, nullptr, false, + utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_FULL); + if (r < 0) { + return r; + } + + std::string source_spec; + if (vm.count("source-spec") && vm.count("source-spec-path")) { + std::cerr << "rbd: cannot specify both source-spec and source-spec-path" + << std::endl; + return -EINVAL; + } else if (vm.count("source-spec-path")) { + std::string source_spec_path = vm["source-spec-path"].as<std::string>(); + + int fd = STDIN_FILENO; + if (source_spec_path != "-") { + fd = open(source_spec_path.c_str(), O_RDONLY); + if (fd < 0) { + r = -errno; + std::cerr << "rbd: error opening " << source_spec_path << std::endl; + return r; + } + } + + source_spec.resize(4096); + r = safe_read(fd, source_spec.data(), source_spec.size() - 1); + if (fd != STDIN_FILENO) { + VOID_TEMP_FAILURE_RETRY(close(fd)); + } + + if (r >= 0) { + source_spec.resize(r); + } else { + std::cerr << "rbd: error reading source-spec file: " << cpp_strerror(r) + << std::endl; + return r; + } + } else if (vm.count("source-spec")) { + source_spec = vm["source-spec"].as<std::string>(); + } + + librados::Rados rados; + librados::IoCtx io_ctx; + r = utils::init(pool_name, namespace_name, &rados, &io_ctx); + if (r < 0) { + return r; + } + + librados::IoCtx dst_io_ctx; + if (source_spec.empty()) { + utils::normalize_pool_name(&dst_pool_name); + r = utils::init_io_ctx(rados, dst_pool_name, dst_namespace_name, + &dst_io_ctx); + if (r < 0) { + return r; + } + } + + if (import_only && source_spec.empty()) { + if (snap_name.empty()) { + std::cerr << "rbd: snapshot name was not specified" << std::endl; + return -EINVAL; + } + + std::stringstream ss; + ss << R"({)" + << R"("type":"native",)" + << R"("pool_id":)" << io_ctx.get_id() << R"(,)" + << R"("pool_namespace":")" << io_ctx.get_namespace() << R"(",)" + << R"("image_name":")" << image_name << R"(",)" + << R"("snap_name":")" << snap_name << R"(")" + << R"(})"; + source_spec = ss.str(); + + if (dst_image_name.empty()) { + std::cerr << "rbd: destination image name must be provided" << std::endl; + return -EINVAL; + } + io_ctx = dst_io_ctx; + image_name = dst_image_name; + snap_name = ""; + } else if (!import_only && !source_spec.empty()) { + std::cerr << "rbd: --import-only must be used in combination with " + << "source-spec/source-spec-path" << std::endl; + return -EINVAL; + } + + if (!snap_name.empty()) { + std::cerr << "rbd: snapshot name specified for a command that doesn't " + << "use it" << std::endl; + return -EINVAL; + } + + librbd::ImageOptions opts; + r = utils::get_image_options(vm, true, &opts); + if (r < 0) { + return r; + } + + if (source_spec.empty()) { + if (dst_image_name.empty()) { + dst_image_name = image_name; + } + + int r = librbd::RBD().migration_prepare(io_ctx, image_name.c_str(), + dst_io_ctx, dst_image_name.c_str(), + opts); + if (r < 0) { + std::cerr << "rbd: preparing migration failed: " << cpp_strerror(r) + << std::endl; + return r; + } + } else { + ceph_assert(import_only); + r = librbd::RBD().migration_prepare_import(source_spec.c_str(), io_ctx, + image_name.c_str(), opts); + if (r < 0) { + std::cerr << "rbd: preparing import migration failed: " << cpp_strerror(r) + << std::endl; + return r; + } + } + + return 0; +} + +void get_execute_arguments(po::options_description *positional, + po::options_description *options) { + at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE); + at::add_no_progress_option(options); +} + +int execute_execute(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { + size_t arg_index = 0; + std::string pool_name; + std::string namespace_name; + std::string image_name; + int r = utils::get_pool_image_snapshot_names( + vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name, + &image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE, + utils::SPEC_VALIDATION_NONE); + if (r < 0) { + return r; + } + + librados::Rados rados; + librados::IoCtx io_ctx; + r = utils::init(pool_name, namespace_name, &rados, &io_ctx); + if (r < 0) { + return r; + } + io_ctx.set_pool_full_try(); + + r = do_execute(io_ctx, image_name, vm[at::NO_PROGRESS].as<bool>()); + if (r < 0) { + return r; + } + + return 0; +} + +void get_abort_arguments(po::options_description *positional, + po::options_description *options) { + at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE); + at::add_no_progress_option(options); +} + +int execute_abort(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { + size_t arg_index = 0; + std::string pool_name; + std::string namespace_name; + std::string image_name; + int r = utils::get_pool_image_snapshot_names( + vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name, + &image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE, + utils::SPEC_VALIDATION_NONE); + if (r < 0) { + return r; + } + + librados::Rados rados; + librados::IoCtx io_ctx; + r = utils::init(pool_name, namespace_name, &rados, &io_ctx); + if (r < 0) { + return r; + } + io_ctx.set_pool_full_try(); + + r = do_abort(io_ctx, image_name, vm[at::NO_PROGRESS].as<bool>()); + if (r < 0) { + return r; + } + + return 0; +} + +void get_commit_arguments(po::options_description *positional, + po::options_description *options) { + at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE); + at::add_no_progress_option(options); + options->add_options() + ("force", po::bool_switch(), "proceed even if the image has children"); +} + +int execute_commit(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { + size_t arg_index = 0; + std::string pool_name; + std::string namespace_name; + std::string image_name; + int r = utils::get_pool_image_snapshot_names( + vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name, + &image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE, + utils::SPEC_VALIDATION_NONE); + if (r < 0) { + return r; + } + + librados::Rados rados; + librados::IoCtx io_ctx; + r = utils::init(pool_name, namespace_name, &rados, &io_ctx); + if (r < 0) { + return r; + } + io_ctx.set_pool_full_try(); + + r = do_commit(io_ctx, image_name, vm["force"].as<bool>(), + vm[at::NO_PROGRESS].as<bool>()); + if (r < 0) { + return r; + } + + return 0; +} + +Shell::SwitchArguments switched_arguments({"import-only"}); + +Shell::Action action_prepare( + {"migration", "prepare"}, {}, "Prepare image migration.", + at::get_long_features_help(), &get_prepare_arguments, &execute_prepare); + +Shell::Action action_execute( + {"migration", "execute"}, {}, "Execute image migration.", "", + &get_execute_arguments, &execute_execute); + +Shell::Action action_abort( + {"migration", "abort"}, {}, "Cancel interrupted image migration.", "", + &get_abort_arguments, &execute_abort); + +Shell::Action action_commit( + {"migration", "commit"}, {}, "Commit image migration.", "", + &get_commit_arguments, &execute_commit); + +} // namespace migration +} // namespace action +} // namespace rbd |