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vtctl.go
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// Copyright 2012, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// The following comment section contains definitions for command arguments.
/*
COMMAND ARGUMENT DEFINITIONS
- cell, cell name: A cell is a location for a service. Generally, a cell
resides in only one cluster. In Vitess, the terms "cell" and
"data center" are interchangeable. The argument value is a
string that does not contain whitespace.
- tablet alias: A Tablet Alias uniquely identifies a vttablet. The argument
value is in the format
<code><cell name>-<uid></code>.
- keyspace, keyspace name: The name of a sharded database that contains one
or more tables. Vitess distributes keyspace shards into multiple
machines and provides an SQL interface to query the data. The
argument value must be a string that does not contain whitespace.
- port name: A port number. The argument value should be an integer between
<code>0</code> and <code>65535</code>, inclusive.
- shard, shard name: The name of a shard. The argument value is typically in
the format <code><range start>-<range end></code>.
- keyspace/shard: The name of a sharded database that contains one or more
tables as well as the shard associated with the command.
The keyspace must be identified by a string that does not
contain whitepace, while the shard is typically identified
by a string in the format
<code><range start>-<range end></code>.
- duration: The amount of time that the action queue should be blocked.
The value is a string that contains a possibly signed sequence
of decimal numbers, each with optional fraction and a unit
suffix, such as "300ms" or "1h45m". See the definition of the
Go language's <a
href="http://golang.org/pkg/time/#ParseDuration">ParseDuration</a>
function for more details. Note that, in practice, the value
should be a positively signed value.
- db type, tablet type: The vttablet's role. Valid values are:
-- backup: A slaved copy of data that is offline to queries other than
for backup purposes
-- batch: A slaved copy of data for OLAP load patterns (typically for
MapReduce jobs)
-- worker: A tablet that is in use by a vtworker process. The tablet is likely
lagging in replication.
-- experimental: A slaved copy of data that is ready but not serving query
traffic. The value indicates a special characteristic of
the tablet that indicates the tablet should not be
considered a potential master. Vitess also does not
worry about lag for experimental tablets when reparenting.
-- master: A primary copy of data
-- rdonly: A slaved copy of data for OLAP load patterns
-- replica: A slaved copy of data ready to be promoted to master
-- restore: A tablet that is restoring from a snapshot. Typically, this
happens at tablet startup, then it goes to its right state.
-- schema_apply: A slaved copy of data that had been serving query traffic
but that is now applying a schema change. Following the
change, the tablet will revert to its serving type.
-- snapshot_source: A slaved copy of data where mysqld is <b>not</b>
running and where Vitess is serving data files to
clone slaves. Use this command to enter this mode:
<pre>vtctl Snapshot -server-mode ...</pre>
Use this command to exit this mode:
<pre>vtctl SnapshotSourceEnd ...</pre>
-- spare: A slaved copy of data that is ready but not serving query traffic.
The data could be a potential master tablet.
*/
package vtctl
import (
"encoding/json"
"errors"
"flag"
"fmt"
"io"
"io/ioutil"
"net"
"sort"
"strconv"
"strings"
"sync"
"time"
log "github.com/golang/glog"
"golang.org/x/net/context"
"github.com/youtube/vitess/go/flagutil"
"github.com/youtube/vitess/go/sqltypes"
hk "github.com/youtube/vitess/go/vt/hook"
"github.com/youtube/vitess/go/vt/key"
"github.com/youtube/vitess/go/vt/logutil"
"github.com/youtube/vitess/go/vt/mysqlctl/replication"
"github.com/youtube/vitess/go/vt/schemamanager"
"github.com/youtube/vitess/go/vt/tabletserver/tabletconn"
"github.com/youtube/vitess/go/vt/topo"
"github.com/youtube/vitess/go/vt/topo/topoproto"
"github.com/youtube/vitess/go/vt/topotools"
"github.com/youtube/vitess/go/vt/wrangler"
replicationdatapb "github.com/youtube/vitess/go/vt/proto/replicationdata"
topodatapb "github.com/youtube/vitess/go/vt/proto/topodata"
vschemapb "github.com/youtube/vitess/go/vt/proto/vschema"
)
var (
// ErrUnknownCommand is returned for an unknown command
ErrUnknownCommand = errors.New("unknown command")
)
var (
healthCheckTopologyRefresh = flag.Duration("vtctl_healthcheck_topology_refresh", 30*time.Second, "refresh interval for re-reading the topology")
healthcheckRetryDelay = flag.Duration("vtctl_healthcheck_retry_delay", 5*time.Second, "delay before retrying a failed healthcheck")
healthCheckTimeout = flag.Duration("vtctl_healthcheck_timeout", time.Minute, "the health check timeout period")
)
type command struct {
name string
method func(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error
params string
help string // if help is empty, won't list the command
}
type commandGroup struct {
name string
commands []command
}
// commandsMutex protects commands at init time. We use servenv, which calls
// all Run hooks in parallel.
var commandsMutex sync.Mutex
var commands = []commandGroup{
{
"Tablets", []command{
{"InitTablet", commandInitTablet,
"[-allow_update] [-allow_different_shard] [-allow_master_override] [-parent] [-db_name_override=<db name>] [-hostname=<hostname>] [-mysql_port=<port>] [-port=<port>] [-grpc_port=<port>] -keyspace=<keyspace> -shard=<shard> <tablet alias> <tablet type>",
"Initializes a tablet in the topology.\n"},
{"GetTablet", commandGetTablet,
"<tablet alias>",
"Outputs a JSON structure that contains information about the Tablet."},
{"UpdateTabletAddrs", commandUpdateTabletAddrs,
"[-hostname <hostname>] [-ip-addr <ip addr>] [-mysql-port <mysql port>] [-vt-port <vt port>] [-grpc-port <grpc port>] <tablet alias> ",
"Updates the IP address and port numbers of a tablet."},
{"DeleteTablet", commandDeleteTablet,
"[-allow_master] <tablet alias> ...",
"Deletes tablet(s) from the topology."},
{"SetReadOnly", commandSetReadOnly,
"<tablet alias>",
"Sets the tablet as read-only."},
{"SetReadWrite", commandSetReadWrite,
"<tablet alias>",
"Sets the tablet as read-write."},
{"StartSlave", commandStartSlave,
"<tablet alias>",
"Starts replication on the specified slave."},
{"StopSlave", commandStopSlave,
"<tablet alias>",
"Stops replication on the specified slave."},
{"ChangeSlaveType", commandChangeSlaveType,
"[-dry-run] <tablet alias> <tablet type>",
"Changes the db type for the specified tablet, if possible. This command is used primarily to arrange replicas, and it will not convert a master.\n" +
"NOTE: This command automatically updates the serving graph.\n"},
{"Ping", commandPing,
"<tablet alias>",
"Checks that the specified tablet is awake and responding to RPCs. This command can be blocked by other in-flight operations."},
{"RefreshState", commandRefreshState,
"<tablet alias>",
"Reloads the tablet record on the specified tablet."},
{"RunHealthCheck", commandRunHealthCheck,
"<tablet alias>",
"Runs a health check on a remote tablet."},
{"IgnoreHealthError", commandIgnoreHealthError,
"<tablet alias> <ignore regexp>",
"Sets the regexp for health check errors to ignore on the specified tablet. The pattern has implicit ^$ anchors. Set to empty string or restart vttablet to stop ignoring anything."},
{"Sleep", commandSleep,
"<tablet alias> <duration>",
"Blocks the action queue on the specified tablet for the specified amount of time. This is typically used for testing."},
{"Backup", commandBackup,
"[-concurrency=4] <tablet alias>",
"Stops mysqld and uses the BackupStorage service to store a new backup. This function also remembers if the tablet was replicating so that it can restore the same state after the backup completes."},
{"ExecuteHook", commandExecuteHook,
"<tablet alias> <hook name> [<param1=value1> <param2=value2> ...]",
"Runs the specified hook on the given tablet. A hook is a script that resides in the $VTROOT/vthook directory. You can put any script into that directory and use this command to run that script.\n" +
"For this command, the param=value arguments are parameters that the command passes to the specified hook."},
{"ExecuteFetchAsDba", commandExecuteFetchAsDba,
"[-max_rows=10000] [-disable_binlogs] [-json] <tablet alias> <sql command>",
"Runs the given SQL command as a DBA on the remote tablet."},
},
},
{
"Shards", []command{
{"CreateShard", commandCreateShard,
"[-force] [-parent] <keyspace/shard>",
"Creates the specified shard."},
{"GetShard", commandGetShard,
"<keyspace/shard>",
"Outputs a JSON structure that contains information about the Shard."},
{"TabletExternallyReparented", commandTabletExternallyReparented,
"<tablet alias>",
"Changes metadata in the topology server to acknowledge a shard master change performed by an external tool. See the Reparenting guide for more information:" +
"https://github.com/youtube/vitess/blob/master/doc/Reparenting.md#external-reparents."},
{"ValidateShard", commandValidateShard,
"[-ping-tablets] <keyspace/shard>",
"Validates that all nodes that are reachable from this shard are consistent."},
{"ShardReplicationPositions", commandShardReplicationPositions,
"<keyspace/shard>",
"Shows the replication status of each slave machine in the shard graph. In this case, the status refers to the replication lag between the master vttablet and the slave vttablet. In Vitess, data is always written to the master vttablet first and then replicated to all slave vttablets. Output is sorted by tablet type, then replication position. Use ctrl-C to interrupt command and see partial result if needed."},
{"ListShardTablets", commandListShardTablets,
"<keyspace/shard>",
"Lists all tablets in the specified shard."},
{"SetShardServedTypes", commandSetShardServedTypes,
"<keyspace/shard> [<served tablet type1>,<served tablet type2>,...]",
"Sets a given shard's served tablet types. Does not rebuild any serving graph."},
{"SetShardTabletControl", commandSetShardTabletControl,
"[--cells=c1,c2,...] [--blacklisted_tables=t1,t2,...] [--remove] [--disable_query_service] <keyspace/shard> <tablet type>",
"Sets the TabletControl record for a shard and type. Only use this for an emergency fix or after a finished vertical split. The *MigrateServedFrom* and *MigrateServedType* commands set this field appropriately already. Always specify the blacklisted_tables flag for vertical splits, but never for horizontal splits."},
{"SourceShardDelete", commandSourceShardDelete,
"<keyspace/shard> <uid>",
"Deletes the SourceShard record with the provided index. This is meant as an emergency cleanup function. It does not call RefreshState for the shard master."},
{"SourceShardAdd", commandSourceShardAdd,
"[--key_range=<keyrange>] [--tables=<table1,table2,...>] <keyspace/shard> <uid> <source keyspace/shard>",
"Adds the SourceShard record with the provided index. This is meant as an emergency function. It does not call RefreshState for the shard master."},
{"ShardReplicationAdd", commandShardReplicationAdd,
"<keyspace/shard> <tablet alias> <parent tablet alias>",
"HIDDEN Adds an entry to the replication graph in the given cell."},
{"ShardReplicationRemove", commandShardReplicationRemove,
"<keyspace/shard> <tablet alias>",
"HIDDEN Removes an entry from the replication graph in the given cell."},
{"ShardReplicationFix", commandShardReplicationFix,
"<cell> <keyspace/shard>",
"Walks through a ShardReplication object and fixes the first error that it encounters."},
{"WaitForFilteredReplication", commandWaitForFilteredReplication,
"[-max_delay <max_delay, default 30s>] <keyspace/shard>",
"Blocks until the specified shard has caught up with the filtered replication of its source shard."},
{"RemoveShardCell", commandRemoveShardCell,
"[-force] [-recursive] <keyspace/shard> <cell>",
"Removes the cell from the shard's Cells list."},
{"DeleteShard", commandDeleteShard,
"[-recursive] <keyspace/shard> ...",
"Deletes the specified shard(s). In recursive mode, it also deletes all tablets belonging to the shard. Otherwise, there must be no tablets left in the shard."},
},
},
{
"Keyspaces", []command{
{"CreateKeyspace", commandCreateKeyspace,
"[-sharding_column_name=name] [-sharding_column_type=type] [-served_from=tablettype1:ks1,tablettype2,ks2,...] [-force] <keyspace name>",
"Creates the specified keyspace."},
{"DeleteKeyspace", commandDeleteKeyspace,
"[-recursive] <keyspace>",
"Deletes the specified keyspace. In recursive mode, it also recursively deletes all shards in the keyspace. Otherwise, there must be no shards left in the keyspace."},
{"RemoveKeyspaceCell", commandRemoveKeyspaceCell,
"[-force] [-recursive] <keyspace> <cell>",
"Removes the cell from the Cells list for all shards in the keyspace."},
{"GetKeyspace", commandGetKeyspace,
"<keyspace>",
"Outputs a JSON structure that contains information about the Keyspace."},
{"GetKeyspaces", commandGetKeyspaces,
"",
"Outputs a sorted list of all keyspaces."},
{"SetKeyspaceShardingInfo", commandSetKeyspaceShardingInfo,
"[-force] <keyspace name> [<column name>] [<column type>]",
"Updates the sharding information for a keyspace."},
{"SetKeyspaceServedFrom", commandSetKeyspaceServedFrom,
"[-source=<source keyspace name>] [-remove] [-cells=c1,c2,...] <keyspace name> <tablet type>",
"Changes the ServedFromMap manually. This command is intended for emergency fixes. This field is automatically set when you call the *MigrateServedFrom* command. This command does not rebuild the serving graph."},
{"RebuildKeyspaceGraph", commandRebuildKeyspaceGraph,
"[-cells=c1,c2,...] <keyspace> ...",
"Rebuilds the serving data for the keyspace. This command may trigger an update to all connected clients."},
{"ValidateKeyspace", commandValidateKeyspace,
"[-ping-tablets] <keyspace name>",
"Validates that all nodes reachable from the specified keyspace are consistent."},
{"MigrateServedTypes", commandMigrateServedTypes,
"[-cells=c1,c2,...] [-reverse] [-skip-refresh-state] <keyspace/shard> <served tablet type>",
"Migrates a serving type from the source shard to the shards that it replicates to. This command also rebuilds the serving graph. The <keyspace/shard> argument can specify any of the shards involved in the migration."},
{"MigrateServedFrom", commandMigrateServedFrom,
"[-cells=c1,c2,...] [-reverse] <destination keyspace/shard> <served tablet type>",
"Makes the <destination keyspace/shard> serve the given type. This command also rebuilds the serving graph."},
{"FindAllShardsInKeyspace", commandFindAllShardsInKeyspace,
"<keyspace>",
"Displays all of the shards in the specified keyspace."},
{"WaitForDrain", commandWaitForDrain,
"[-timeout <duration>] <keyspace/shard> <served tablet type>",
"Blocks until no new queries were observed on all tablets with the given tablet type in the specifed keyspace. " +
" This can be used as sanity check to ensure that the tablets were drained after running vtctl MigrateServedTypes " +
" and vtgate is no longer using them. If -timeout is set, it fails when the timeout is reached."},
},
},
{
"Generic", []command{
{"RebuildReplicationGraph", commandRebuildReplicationGraph,
"<cell1>,<cell2>... <keyspace1>,<keyspace2>,...",
"HIDDEN This takes the Thor's hammer approach of recovery and should only be used in emergencies. cell1,cell2,... are the canonical source of data for the system. This function uses that canonical data to recover the replication graph, at which point further auditing with Validate can reveal any remaining issues."},
{"Validate", commandValidate,
"[-ping-tablets]",
"Validates that all nodes reachable from the global replication graph and that all tablets in all discoverable cells are consistent."},
{"ListAllTablets", commandListAllTablets,
"<cell name>",
"Lists all tablets in an awk-friendly way."},
{"ListTablets", commandListTablets,
"<tablet alias> ...",
"Lists specified tablets in an awk-friendly way."},
{"Panic", commandPanic,
"",
"HIDDEN Triggers a panic on the server side, to test the handling."},
},
},
{
"Schema, Version, Permissions", []command{
{"GetSchema", commandGetSchema,
"[-tables=<table1>,<table2>,...] [-exclude_tables=<table1>,<table2>,...] [-include-views] <tablet alias>",
"Displays the full schema for a tablet, or just the schema for the specified tables in that tablet."},
{"ReloadSchema", commandReloadSchema,
"<tablet alias>",
"Reloads the schema on a remote tablet."},
{"ValidateSchemaShard", commandValidateSchemaShard,
"[-exclude_tables=''] [-include-views] <keyspace/shard>",
"Validates that the master schema matches all of the slaves."},
{"ValidateSchemaKeyspace", commandValidateSchemaKeyspace,
"[-exclude_tables=''] [-include-views] <keyspace name>",
"Validates that the master schema from shard 0 matches the schema on all of the other tablets in the keyspace."},
{"ApplySchema", commandApplySchema,
"[-allow_long_unavailability] [-wait_slave_timeout=10s] {-sql=<sql> || -sql-file=<filename>} <keyspace>",
"Applies the schema change to the specified keyspace on every master, running in parallel on all shards. The changes are then propagated to slaves via replication. If -allow_long_unavailability is set, schema changes affecting a large number of rows (and possibly incurring a longer period of unavailability) will not be rejected."},
{"CopySchemaShard", commandCopySchemaShard,
"[-tables=<table1>,<table2>,...] [-exclude_tables=<table1>,<table2>,...] [-include-views] [-wait_slave_timeout=10s] {<source keyspace/shard> || <source tablet alias>} <destination keyspace/shard>",
"Copies the schema from a source shard's master (or a specific tablet) to a destination shard. The schema is applied directly on the master of the destination shard, and it is propagated to the replicas through binlogs."},
{"ValidateVersionShard", commandValidateVersionShard,
"<keyspace/shard>",
"Validates that the master version matches all of the slaves."},
{"ValidateVersionKeyspace", commandValidateVersionKeyspace,
"<keyspace name>",
"Validates that the master version from shard 0 matches all of the other tablets in the keyspace."},
{"GetPermissions", commandGetPermissions,
"<tablet alias>",
"Displays the permissions for a tablet."},
{"ValidatePermissionsShard", commandValidatePermissionsShard,
"<keyspace/shard>",
"Validates that the master permissions match all the slaves."},
{"ValidatePermissionsKeyspace", commandValidatePermissionsKeyspace,
"<keyspace name>",
"Validates that the master permissions from shard 0 match those of all of the other tablets in the keyspace."},
{"GetVSchema", commandGetVSchema,
"<keyspace>",
"Displays the VTGate routing schema."},
{"ApplyVSchema", commandApplyVSchema,
"{-vschema=<vschema> || -vschema_file=<vschema file>} [-cells=c1,c2,...] [-skip_rebuild] <keyspace>",
"Applies the VTGate routing schema to the provided keyspace. Shows the result after application."},
{"RebuildVSchemaGraph", commandRebuildVSchemaGraph,
"[-cells=c1,c2,...]",
"Rebuilds the cell-specific SrvVSchema from the global VSchema objects in the provided cells (or all cells if none provided)."},
},
},
{
"Serving Graph", []command{
{"GetSrvKeyspaceNames", commandGetSrvKeyspaceNames,
"<cell>",
"Outputs a list of keyspace names."},
{"GetSrvKeyspace", commandGetSrvKeyspace,
"<cell> <keyspace>",
"Outputs a JSON structure that contains information about the SrvKeyspace."},
{"GetSrvVSchema", commandGetSrvVSchema,
"<cell>",
"Outputs a JSON structure that contains information about the SrvVSchema."},
},
},
{
"Replication Graph", []command{
{"GetShardReplication", commandGetShardReplication,
"<cell> <keyspace/shard>",
"Outputs a JSON structure that contains information about the ShardReplication."},
},
},
}
func init() {
// This cannot be in the static 'commands ' array, as commands
// would reference commandHelp that references commands
// (circular reference)
addCommand("Generic", command{"Help", commandHelp,
"[command name]",
"Prints the list of available commands, or help on a specific command."})
}
func addCommand(groupName string, c command) {
commandsMutex.Lock()
defer commandsMutex.Unlock()
for i, group := range commands {
if group.name == groupName {
commands[i].commands = append(commands[i].commands, c)
return
}
}
panic(fmt.Errorf("Trying to add to missing group %v", groupName))
}
func addCommandGroup(groupName string) {
commandsMutex.Lock()
defer commandsMutex.Unlock()
commands = append(commands, commandGroup{
name: groupName,
})
}
func fmtMapAwkable(m map[string]string) string {
pairs := make([]string, len(m))
i := 0
for k, v := range m {
pairs[i] = fmt.Sprintf("%v: %q", k, v)
i++
}
sort.Strings(pairs)
return "[" + strings.Join(pairs, " ") + "]"
}
func fmtTabletAwkable(ti *topo.TabletInfo) string {
keyspace := ti.Keyspace
shard := ti.Shard
if keyspace == "" {
keyspace = "<null>"
}
if shard == "" {
shard = "<null>"
}
return fmt.Sprintf("%v %v %v %v %v %v %v", topoproto.TabletAliasString(ti.Alias), keyspace, shard, topoproto.TabletTypeLString(ti.Type), ti.Addr(), ti.MysqlAddr(), fmtMapAwkable(ti.Tags))
}
func listTabletsByShard(ctx context.Context, wr *wrangler.Wrangler, keyspace, shard string) error {
tabletAliases, err := wr.TopoServer().FindAllTabletAliasesInShard(ctx, keyspace, shard)
if err != nil {
return err
}
return dumpTablets(ctx, wr, tabletAliases)
}
func dumpAllTablets(ctx context.Context, wr *wrangler.Wrangler, zkVtPath string) error {
tablets, err := topotools.GetAllTablets(ctx, wr.TopoServer(), zkVtPath)
if err != nil {
return err
}
for _, ti := range tablets {
wr.Logger().Printf("%v\n", fmtTabletAwkable(ti))
}
return nil
}
func dumpTablets(ctx context.Context, wr *wrangler.Wrangler, tabletAliases []*topodatapb.TabletAlias) error {
tabletMap, err := wr.TopoServer().GetTabletMap(ctx, tabletAliases)
if err != nil {
return err
}
for _, tabletAlias := range tabletAliases {
ti, ok := tabletMap[*tabletAlias]
if !ok {
log.Warningf("failed to load tablet %v", tabletAlias)
} else {
wr.Logger().Printf("%v\n", fmtTabletAwkable(ti))
}
}
return nil
}
// getFileParam returns a string containing either flag is not "",
// or the content of the file named flagFile
func getFileParam(flag, flagFile, name string) (string, error) {
if flag != "" {
if flagFile != "" {
return "", fmt.Errorf("action requires only one of %v or %v-file", name, name)
}
return flag, nil
}
if flagFile == "" {
return "", fmt.Errorf("action requires one of %v or %v-file", name, name)
}
data, err := ioutil.ReadFile(flagFile)
if err != nil {
return "", fmt.Errorf("Cannot read file %v: %v", flagFile, err)
}
return string(data), nil
}
// keyspaceParamsToKeyspaces builds a list of keyspaces.
// It supports topology-based wildcards, and plain wildcards.
// For instance:
// us* // using plain matching
// * // using plain matching
func keyspaceParamsToKeyspaces(ctx context.Context, wr *wrangler.Wrangler, params []string) ([]string, error) {
result := make([]string, 0, len(params))
for _, param := range params {
if param[0] == '/' {
// this is a topology-specific path
for _, path := range params {
result = append(result, path)
}
} else {
// this is not a path, so assume a keyspace name,
// possibly with wildcards
keyspaces, err := topo.ResolveKeyspaceWildcard(ctx, wr.TopoServer(), param)
if err != nil {
return nil, fmt.Errorf("Failed to resolve keyspace wildcard %v: %v", param, err)
}
result = append(result, keyspaces...)
}
}
return result, nil
}
// shardParamsToKeyspaceShards builds a list of keyspace/shard pairs.
// It supports topology-based wildcards, and plain wildcards.
// For instance:
// user/* // using plain matching
// */0 // using plain matching
func shardParamsToKeyspaceShards(ctx context.Context, wr *wrangler.Wrangler, params []string) ([]topo.KeyspaceShard, error) {
result := make([]topo.KeyspaceShard, 0, len(params))
for _, param := range params {
if param[0] == '/' {
// this is a topology-specific path
for _, path := range params {
keyspace, shard, err := topoproto.ParseKeyspaceShard(path)
if err != nil {
return nil, err
}
result = append(result, topo.KeyspaceShard{Keyspace: keyspace, Shard: shard})
}
} else {
// this is not a path, so assume a keyspace
// name / shard name, each possibly with wildcards
keyspaceShards, err := topo.ResolveShardWildcard(ctx, wr.TopoServer(), param)
if err != nil {
return nil, fmt.Errorf("Failed to resolve keyspace/shard wildcard %v: %v", param, err)
}
result = append(result, keyspaceShards...)
}
}
return result, nil
}
// tabletParamsToTabletAliases takes multiple params and converts them
// to tablet aliases.
func tabletParamsToTabletAliases(params []string) ([]*topodatapb.TabletAlias, error) {
result := make([]*topodatapb.TabletAlias, len(params))
var err error
for i, param := range params {
result[i], err = topoproto.ParseTabletAlias(param)
if err != nil {
return nil, err
}
}
return result, nil
}
// parseTabletType parses the string tablet type and verifies
// it is an accepted one
func parseTabletType(param string, types []topodatapb.TabletType) (topodatapb.TabletType, error) {
tabletType, err := topoproto.ParseTabletType(param)
if err != nil {
return topodatapb.TabletType_UNKNOWN, fmt.Errorf("invalid tablet type %v: %v", param, err)
}
if !topoproto.IsTypeInList(topodatapb.TabletType(tabletType), types) {
return topodatapb.TabletType_UNKNOWN, fmt.Errorf("Type %v is not one of: %v", tabletType, strings.Join(topoproto.MakeStringTypeList(types), " "))
}
return tabletType, nil
}
// parseServingTabletType3 parses the tablet type into the enum,
// and makes sure the enum is of serving type (MASTER, REPLICA, RDONLY/BATCH)
func parseServingTabletType3(param string) (topodatapb.TabletType, error) {
servedType, err := topoproto.ParseTabletType(param)
if err != nil {
return topodatapb.TabletType_UNKNOWN, err
}
if !topo.IsInServingGraph(servedType) {
return topodatapb.TabletType_UNKNOWN, fmt.Errorf("served_type has to be in the serving graph, not %v", param)
}
return servedType, nil
}
func commandInitTablet(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
dbNameOverride := subFlags.String("db_name_override", "", "Overrides the name of the database that the vttablet uses")
allowUpdate := subFlags.Bool("allow_update", false, "Use this flag to force initialization if a tablet with the same name already exists. Use with caution.")
allowDifferentShard := subFlags.Bool("allow_different_shard", false, "Use this flag to force initialization if a tablet with the same name but a different keyspace/shard already exists. Use with caution.")
allowMasterOverride := subFlags.Bool("allow_master_override", false, "Use this flag to force initialization if a tablet is created as master, and a master for the keyspace/shard already exists. Use with caution.")
createShardAndKeyspace := subFlags.Bool("parent", false, "Creates the parent shard and keyspace if they don't yet exist")
hostname := subFlags.String("hostname", "", "The server on which the tablet is running")
mysqlPort := subFlags.Int("mysql_port", 0, "The mysql port for the mysql daemon")
port := subFlags.Int("port", 0, "The main port for the vttablet process")
grpcPort := subFlags.Int("grpc_port", 0, "The gRPC port for the vttablet process")
keyspace := subFlags.String("keyspace", "", "The keyspace to which this tablet belongs")
shard := subFlags.String("shard", "", "The shard to which this tablet belongs")
var tags flagutil.StringMapValue
subFlags.Var(&tags, "tags", "A comma-separated list of key:value pairs that are used to tag the tablet")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 2 {
return fmt.Errorf("The <tablet alias> and <tablet type> arguments are both required for the InitTablet command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
tabletType, err := parseTabletType(subFlags.Arg(1), topoproto.AllTabletTypes)
if err != nil {
return err
}
// create tablet record
tablet := &topodatapb.Tablet{
Alias: tabletAlias,
Hostname: *hostname,
PortMap: make(map[string]int32),
Keyspace: *keyspace,
Shard: *shard,
Type: tabletType,
DbNameOverride: *dbNameOverride,
Tags: tags,
}
if *port != 0 {
tablet.PortMap["vt"] = int32(*port)
}
if *mysqlPort != 0 {
tablet.PortMap["mysql"] = int32(*mysqlPort)
}
if *grpcPort != 0 {
tablet.PortMap["grpc"] = int32(*grpcPort)
}
return wr.InitTablet(ctx, tablet, *allowMasterOverride, *allowDifferentShard, *createShardAndKeyspace, *allowUpdate)
}
func commandGetTablet(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("The <tablet alias> argument is required for the GetTablet command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return err
}
return printJSON(wr.Logger(), tabletInfo)
}
func commandUpdateTabletAddrs(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
hostname := subFlags.String("hostname", "", "The fully qualified host name of the server on which the tablet is running.")
ipAddr := subFlags.String("ip-addr", "", "IP address")
mysqlPort := subFlags.Int("mysql-port", 0, "The mysql port for the mysql daemon")
vtPort := subFlags.Int("vt-port", 0, "The main port for the vttablet process")
grpcPort := subFlags.Int("grpc-port", 0, "The gRPC port for the vttablet process")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("The <tablet alias> argument is required for the UpdateTabletAddrs command.")
}
if *ipAddr != "" && net.ParseIP(*ipAddr) == nil {
return fmt.Errorf("malformed address: %v", *ipAddr)
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
_, err = wr.TopoServer().UpdateTabletFields(ctx, tabletAlias, func(tablet *topodatapb.Tablet) error {
if *hostname != "" {
tablet.Hostname = *hostname
}
if *ipAddr != "" {
tablet.Ip = *ipAddr
}
if *vtPort != 0 || *grpcPort != 0 || *mysqlPort != 0 {
if tablet.PortMap == nil {
tablet.PortMap = make(map[string]int32)
}
if *vtPort != 0 {
tablet.PortMap["vt"] = int32(*vtPort)
}
if *grpcPort != 0 {
tablet.PortMap["grpc"] = int32(*grpcPort)
}
if *mysqlPort != 0 {
tablet.PortMap["mysql"] = int32(*mysqlPort)
}
}
return nil
})
return err
}
func commandDeleteTablet(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
allowMaster := subFlags.Bool("allow_master", false, "Allows for the master tablet of a shard to be deleted. Use with caution.")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() == 0 {
return fmt.Errorf("The <tablet alias> argument must be used to specify at least one tablet when calling the DeleteTablet command.")
}
tabletAliases, err := tabletParamsToTabletAliases(subFlags.Args())
if err != nil {
return err
}
for _, tabletAlias := range tabletAliases {
if err := wr.DeleteTablet(ctx, tabletAlias, *allowMaster); err != nil {
return err
}
}
return nil
}
func commandSetReadOnly(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("The <tablet alias> argument is required for the SetReadOnly command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
return wr.TabletManagerClient().SetReadOnly(ctx, ti.Tablet)
}
func commandSetReadWrite(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("The <tablet alias> argument is required for the SetReadWrite command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
return wr.TabletManagerClient().SetReadWrite(ctx, ti.Tablet)
}
func commandStartSlave(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("action StartSlave requires <tablet alias>")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
return wr.TabletManagerClient().StartSlave(ctx, ti.Tablet)
}
func commandStopSlave(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("action StopSlave requires <tablet alias>")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
return wr.TabletManagerClient().StopSlave(ctx, ti.Tablet)
}
func commandChangeSlaveType(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
dryRun := subFlags.Bool("dry-run", false, "Lists the proposed change without actually executing it")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 2 {
return fmt.Errorf("The <tablet alias> and <db type> arguments are required for the ChangeSlaveType command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
newType, err := parseTabletType(subFlags.Arg(1), topoproto.AllTabletTypes)
if err != nil {
return err
}
if *dryRun {
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
if !topo.IsTrivialTypeChange(ti.Type, newType) {
return fmt.Errorf("invalid type transition %v: %v -> %v", tabletAlias, ti.Type, newType)
}
wr.Logger().Printf("- %v\n", fmtTabletAwkable(ti))
ti.Type = newType
wr.Logger().Printf("+ %v\n", fmtTabletAwkable(ti))
return nil
}
return wr.ChangeSlaveType(ctx, tabletAlias, newType)
}
func commandPing(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("The <tablet alias> argument is required for the Ping command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return err
}
return wr.TabletManagerClient().Ping(ctx, tabletInfo.Tablet)
}
func commandRefreshState(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("The <tablet alias> argument is required for the RefreshState command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return err
}
return wr.TabletManagerClient().RefreshState(ctx, tabletInfo.Tablet)
}
func commandRunHealthCheck(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("The <tablet alias> argument is required for the RunHealthCheck command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return err
}
return wr.TabletManagerClient().RunHealthCheck(ctx, tabletInfo.Tablet)
}
func commandIgnoreHealthError(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 2 {
return fmt.Errorf("The <tablet alias> and <ignore regexp> arguments are required for the IgnoreHealthError command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
pattern := subFlags.Arg(1)
tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return err
}
return wr.TabletManagerClient().IgnoreHealthError(ctx, tabletInfo.Tablet, pattern)
}
func commandWaitForDrain(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
var cells flagutil.StringListValue
subFlags.Var(&cells, "cells", "Specifies a comma-separated list of cells to look for tablets")
timeout := subFlags.Duration("timeout", 0*time.Second, "Timeout after which the command fails")
retryDelay := subFlags.Duration("retry_delay", 1*time.Second, "Time to wait between two checks")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 2 {
return fmt.Errorf("The <keyspace/shard> and <tablet type> arguments are both required for the WaitForDrain command.")
}
if *timeout != 0 {
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, *timeout)
defer cancel()
}
keyspace, shard, err := topoproto.ParseKeyspaceShard(subFlags.Arg(0))
if err != nil {
return err
}
servedType, err := parseServingTabletType3(subFlags.Arg(1))
if err != nil {
return err
}
return wr.WaitForDrain(ctx, cells, keyspace, shard, servedType,
*retryDelay, *healthCheckTopologyRefresh, *healthcheckRetryDelay, *healthCheckTimeout)
}
func commandSleep(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 2 {
return fmt.Errorf("The <tablet alias> and <duration> arguments are required for the Sleep command.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return err
}
duration, err := time.ParseDuration(subFlags.Arg(1))
if err != nil {
return err
}
return wr.TabletManagerClient().Sleep(ctx, ti.Tablet, duration)
}
func commandBackup(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
concurrency := subFlags.Int("concurrency", 4, "Specifies the number of compression/checksum jobs to run simultaneously")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("The Backup command requires the <tablet alias> argument.")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return err
}
stream, err := wr.TabletManagerClient().Backup(ctx, tabletInfo.Tablet, *concurrency)
if err != nil {
return err
}
for {
e, err := stream.Recv()
switch err {
case nil:
logutil.LogEvent(wr.Logger(), e)
case io.EOF:
return nil
default:
return err
}
}
}
func commandExecuteFetchAsDba(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {