From: Aliasgar Ginwala <[email protected]> Add support in ovsdb-tool for migrating clustered dbs to standalone dbs. E.g. usage to migrate nb/sb db to standalone db from raft: ovsdb-tool cluster-to-standalone ovnnb_db.db ovnnb_db_cluster.db
Signed-off-by: Aliasgar Ginwala <[email protected]> --- Documentation/ref/ovsdb.7.rst | 3 + ovsdb/ovsdb-tool.c | 112 +++++++++++++++++++++++++++++++++- 2 files changed, 114 insertions(+), 1 deletion(-) diff --git a/Documentation/ref/ovsdb.7.rst b/Documentation/ref/ovsdb.7.rst index cd1c63d64..b12d8066c 100644 --- a/Documentation/ref/ovsdb.7.rst +++ b/Documentation/ref/ovsdb.7.rst @@ -514,6 +514,9 @@ standalone database from the contents of a running clustered database. When the cluster is down and cannot be revived, ``ovsdb-client backup`` will not work. +Use ``ovsdb-tool cluster-to-standalone`` to convert clustered database to +standalone database when the cluster is down and cannot be revived. + Upgrading or Downgrading a Database ----------------------------------- diff --git a/ovsdb/ovsdb-tool.c b/ovsdb/ovsdb-tool.c index 438f97590..1956e5492 100644 --- a/ovsdb/ovsdb-tool.c +++ b/ovsdb/ovsdb-tool.c @@ -173,6 +173,9 @@ usage(void) " compare-versions A OP B compare OVSDB schema version numbers\n" " query [DB] TRNS execute read-only transaction on DB\n" " transact [DB] TRNS execute read/write transaction on DB\n" + " cluster-to-standalone [DB [DB]] Convert clustered DB to\n" + "standalone DB when cluster is down and cannot be\n" + "revived\n" " [-m]... show-log [DB] print DB's log entries\n" "The default DB is %s.\n" "The default SCHEMA is %s.\n", @@ -942,6 +945,63 @@ print_raft_record(const struct raft_record *r, } } +static void +write_raft_header_to_file(const struct json *data, + struct ovsdb_log *db_log_data) +{ + if (!data || json_array(data)->n != 2) { + ovs_fatal(0, "***Invalid data***\n"); + } + + struct json *schema_json = json_array(data)->elems[0]; + if (schema_json->type != JSON_NULL) { + struct ovsdb_schema *schema; + check_ovsdb_error(ovsdb_schema_from_json(schema_json, &schema)); + check_ovsdb_error(ovsdb_log_write_and_free(db_log_data, schema_json)); + } + + struct json *data_json = json_array(data)->elems[1]; + if (!data_json || data_json->type != JSON_OBJECT) { + ovs_fatal(0, "***invalid data***\n"); + } + if (data_json->type != JSON_NULL) { + check_ovsdb_error(ovsdb_log_write_and_free(db_log_data, data_json)); + } +} + +static void +write_raft_header(const struct raft_header *h, struct ovsdb_log *db_log_data) +{ + if (h->snap_index) { + write_raft_header_to_file(h->snap.data, db_log_data); + } +} + +static void +write_raft_record_to_file(const struct json *data, + struct ovsdb_log *db_log_data) +{ + if (json_array(data)->n != 2) { + ovs_fatal(0, "***invalid data***\n"); + } + + struct json *data_json = json_array(data)->elems[1]; + if (data_json->type != JSON_NULL) { + check_ovsdb_error(ovsdb_log_write_and_free(db_log_data, data_json)); + } +} + +static void +write_raft_record(const struct raft_record *r, struct ovsdb_log *db_log_data) +{ + if (r->type == RAFT_REC_ENTRY) { + if (!r->entry.data) { + return; + } + write_raft_record_to_file(r->entry.data, db_log_data); + } +} + static void do_show_log_cluster(struct ovsdb_log *log) { @@ -1511,6 +1571,54 @@ do_compare_versions(struct ovs_cmdl_context *ctx) exit(result ? 0 : 2); } +static void +do_convert_to_standalone(struct ovsdb_log *log, struct ovsdb_log *db_log_data) +{ + for (unsigned int i = 0; ; i++) { + struct json *json; + check_ovsdb_error(ovsdb_log_read(log, &json)); + if (!json) { + break; + } + + struct ovsdb_error *error; + if (i == 0) { + struct raft_header h; + check_ovsdb_error(raft_header_from_json(&h, json)); + write_raft_header(&h, db_log_data); + check_ovsdb_error(ovsdb_log_commit_block(db_log_data)); + raft_header_uninit(&h); + + } else { + struct raft_record r; + check_ovsdb_error(raft_record_from_json(&r, json)); + write_raft_record(&r, db_log_data); + check_ovsdb_error(ovsdb_log_commit_block(db_log_data)); + raft_record_uninit(&r); + } + } +} + +static void +do_cluster_standalone(struct ovs_cmdl_context *ctx) +{ + const char *db_file_name = ctx->argv[1]; + const char *cluster_db_file_name = ctx->argv[2]; + struct ovsdb_log *log; + struct ovsdb_log *db_log_data; + + check_ovsdb_error(ovsdb_log_open(cluster_db_file_name, + OVSDB_MAGIC"|"RAFT_MAGIC, + OVSDB_LOG_READ_ONLY, -1, &log)); + check_ovsdb_error(ovsdb_log_open(db_file_name, OVSDB_MAGIC, + OVSDB_LOG_CREATE_EXCL, -1, &db_log_data)); + if (strcmp(ovsdb_log_get_magic(log), RAFT_MAGIC) != 0) { + ovs_fatal(0, "Database is not clustered db.\n"); + } + do_convert_to_standalone(log, db_log_data); + ovsdb_log_close(db_log_data); + ovsdb_log_close(log); +} static void do_help(struct ovs_cmdl_context *ctx OVS_UNUSED) @@ -1550,7 +1658,9 @@ static const struct ovs_cmdl_command all_commands[] = { { "compare-versions", "a op b", 3, 3, do_compare_versions, OVS_RO }, { "help", NULL, 0, INT_MAX, do_help, OVS_RO }, { "list-commands", NULL, 0, INT_MAX, do_list_commands, OVS_RO }, - { NULL, NULL, 0, 0, NULL, OVS_RO }, + { "cluster-to-standalone", "[db [clusterdb]]", 2, 2, + do_cluster_standalone, OVS_RW }, + { NULL, NULL, 2, 2, NULL, OVS_RO }, }; static const struct ovs_cmdl_command *get_all_commands(void) -- 2.20.1 (Apple Git-117) _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
