[tarantool-patches] [PATCH v2 1/1] box: option to start tarantool with no format checks.

[imeevma@tarantool.org]

It is a common case that an instance is running on a version
1.6.*, then is upgraded to 1.9 with box.schema.upgrade(). But
some of users has malformed space formats, and some of them got
and ignored errors on box.schema.upgrade(). Such half-upgraded
data can not be used to start a new version due to format
violations, and can not be rolled back because some of new system
spaces managed to be created. And we can not repair raw xlogs and
snapshots because we have no such tools and they are zipped.

So it would be useful to have a special box.cfg option
ignore_space_formats. It would allow to start an instance on
the spaces with malformed formats, fix them, create a snapshot
and then start with the formats turned on.

Closes #3605

@TarantoolBot document
Title: box.cfg option 'ignore_space_formats'
The option allows to turn off space formats validation before
the instance is started. Useful to fix malformed formats after
an upgrade from version < 1.7.5 to >= 1.7.5.
---
Branch: https://github.com/tarantool/tarantool/tree/imeevma/gh-3605-ignore-space-formats-option
Issue: https://github.com/tarantool/tarantool/issues/3605

 src/box/alter.cc                     | 14 ++++++-
 src/box/box.h                        |  1 +
 src/box/lua/load_cfg.lua             |  2 +
 src/main.cc                          |  1 +
 test/app-tap/init_script.result      | 71 ++++++++++++++++++------------------
 test/box-tap/ignore_formats.test.lua | 20 ++++++++++
 test/box/admin.result                |  2 +
 test/box/cfg.result                  |  4 ++
 8 files changed, 79 insertions(+), 36 deletions(-)
 create mode 100755 test/box-tap/ignore_formats.test.lua

diff --git a/src/box/alter.cc b/src/box/alter.cc
index ec3b91b..b379dad 100644
--- a/src/box/alter.cc
+++ b/src/box/alter.cc
@@ -54,6 +54,18 @@
 #include "sequence.h"
 
 /**
+ * A flag to ignore space formats and do not validate tuples by
+ * them.
+ */
+static bool ignore_space_formats = false;
+
+void
+box_set_ignore_space_formats(bool value)
+{
+	ignore_space_formats = value;
+}
+
+/**
  * chap-sha1 of empty string, i.e.
  * base64_encode(sha1(sha1(""), 0)
  */
@@ -533,7 +545,7 @@ space_def_new_from_tuple(struct tuple *tuple, uint32_t errcode,
 	const char *space_opts;
 	struct field_def *fields;
 	uint32_t field_count;
-	if (dd_version_id >= version_id(1, 7, 6)) {
+	if (dd_version_id >= version_id(1, 7, 6) && !ignore_space_formats) {
 		/* Check space opts. */
 		space_opts =
 			tuple_field_with_type_xc(tuple, BOX_SPACE_FIELD_OPTS,
diff --git a/src/box/box.h b/src/box/box.h
index 9dfb3fd..d4043db 100644
--- a/src/box/box.h
+++ b/src/box/box.h
@@ -176,6 +176,7 @@ void box_set_vinyl_timeout(void);
 void box_set_replication_timeout(void);
 void box_set_replication_connect_timeout(void);
 void box_set_replication_connect_quorum(void);
+void box_set_ignore_space_formats(bool value);
 
 extern "C" {
 #endif /* defined(__cplusplus) */
diff --git a/src/box/lua/load_cfg.lua b/src/box/lua/load_cfg.lua
index 2a7142d..6682d49 100644
--- a/src/box/lua/load_cfg.lua
+++ b/src/box/lua/load_cfg.lua
@@ -66,6 +66,7 @@ local default_cfg = {
     username            = nil,
     coredump            = false,
     read_only           = false,
+    ignore_space_formats= false,
     hot_standby         = false,
     checkpoint_interval = 3600,
     checkpoint_count    = 2,
@@ -124,6 +125,7 @@ local template_cfg = {
     checkpoint_interval = 'number',
     checkpoint_count    = 'number',
     read_only           = 'boolean',
+    ignore_space_formats= 'boolean',
     hot_standby         = 'boolean',
     worker_pool_threads = 'number',
     replication_timeout = 'number',
diff --git a/src/main.cc b/src/main.cc
index 1682bae..30cc78d 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -521,6 +521,7 @@ load_cfg()
 
 	title_set_custom(cfg_gets("custom_proc_title"));
 	title_update();
+	box_set_ignore_space_formats(cfg_geti("ignore_space_formats") != 0);
 	box_cfg();
 }
 
diff --git a/test/app-tap/init_script.result b/test/app-tap/init_script.result
index eea9f5b..f8b8994 100644
--- a/test/app-tap/init_script.result
+++ b/test/app-tap/init_script.result
@@ -9,41 +9,42 @@ box.cfg
 4	coredump:false
 5	force_recovery:false
 6	hot_standby:false
-7	listen:port
-8	log:tarantool.log
-9	log_format:plain
-10	log_level:5
-11	log_nonblock:true
-12	memtx_dir:.
-13	memtx_max_tuple_size:1048576
-14	memtx_memory:107374182
-15	memtx_min_tuple_size:16
-16	pid_file:box.pid
-17	read_only:false
-18	readahead:16320
-19	replication_connect_timeout:30
-20	replication_sync_lag:10
-21	replication_timeout:1
-22	rows_per_wal:500000
-23	slab_alloc_factor:1.05
-24	too_long_threshold:0.5
-25	vinyl_bloom_fpr:0.05
-26	vinyl_cache:134217728
-27	vinyl_dir:.
-28	vinyl_max_tuple_size:1048576
-29	vinyl_memory:134217728
-30	vinyl_page_size:8192
-31	vinyl_range_size:1073741824
-32	vinyl_read_threads:1
-33	vinyl_run_count_per_level:2
-34	vinyl_run_size_ratio:3.5
-35	vinyl_timeout:60
-36	vinyl_write_threads:2
-37	wal_dir:.
-38	wal_dir_rescan_delay:2
-39	wal_max_size:268435456
-40	wal_mode:write
-41	worker_pool_threads:4
+7	ignore_space_formats:false
+8	listen:port
+9	log:tarantool.log
+10	log_format:plain
+11	log_level:5
+12	log_nonblock:true
+13	memtx_dir:.
+14	memtx_max_tuple_size:1048576
+15	memtx_memory:107374182
+16	memtx_min_tuple_size:16
+17	pid_file:box.pid
+18	read_only:false
+19	readahead:16320
+20	replication_connect_timeout:30
+21	replication_sync_lag:10
+22	replication_timeout:1
+23	rows_per_wal:500000
+24	slab_alloc_factor:1.05
+25	too_long_threshold:0.5
+26	vinyl_bloom_fpr:0.05
+27	vinyl_cache:134217728
+28	vinyl_dir:.
+29	vinyl_max_tuple_size:1048576
+30	vinyl_memory:134217728
+31	vinyl_page_size:8192
+32	vinyl_range_size:1073741824
+33	vinyl_read_threads:1
+34	vinyl_run_count_per_level:2
+35	vinyl_run_size_ratio:3.5
+36	vinyl_timeout:60
+37	vinyl_write_threads:2
+38	wal_dir:.
+39	wal_dir_rescan_delay:2
+40	wal_max_size:268435456
+41	wal_mode:write
+42	worker_pool_threads:4
 --
 -- Test insert from detached fiber
 --
diff --git a/test/box-tap/ignore_formats.test.lua b/test/box-tap/ignore_formats.test.lua
new file mode 100755
index 0000000..feba080
--- /dev/null
+++ b/test/box-tap/ignore_formats.test.lua
@@ -0,0 +1,20 @@
+#!/usr/bin/env tarantool
+--
+-- gh-3605: allow to ignore space formats via box.cfg option.
+--
+local tap = require('tap')
+local test = tap.test("ignore_formats")
+test:plan(1)
+
+box.cfg{ignore_space_formats=true}
+
+local format = {}
+format[1] = {'field1', 'unsigned'}
+format[2] = {'field2', 'unsigned'}
+
+local s = box.schema.create_space('test', {format = format})
+local pk = s:create_index('pk')
+test:ok(pcall(s.replace, s, {1, 'string'}), 'can violate format')
+
+s:drop()
+os.exit(test:check() == true and 0 or 1)
diff --git a/test/box/admin.result b/test/box/admin.result
index c3e318a..9200ed8 100644
--- a/test/box/admin.result
+++ b/test/box/admin.result
@@ -30,6 +30,8 @@ cfg_filter(box.cfg)
     - false
   - - hot_standby
     - false
+  - - ignore_space_formats
+    - false
   - - listen
     - <hidden>
   - - log
diff --git a/test/box/cfg.result b/test/box/cfg.result
index cda7aa0..fad4b87 100644
--- a/test/box/cfg.result
+++ b/test/box/cfg.result
@@ -26,6 +26,8 @@ cfg_filter(box.cfg)
     - false
   - - hot_standby
     - false
+  - - ignore_space_formats
+    - false
   - - listen
     - <hidden>
   - - log
@@ -115,6 +117,8 @@ cfg_filter(box.cfg)
     - false
   - - hot_standby
     - false
+  - - ignore_space_formats
+    - false
   - - listen
     - <hidden>
   - - log
-- 
2.7.4