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Bootstrap server service, fixes to server state management

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* Added bootstrap service call to do DBMS side bootstrap operations
  during the cluster bootstrap.
* Added last_committed_gtid() to provider interface
* Implemented wait_for_gtid() provider call
* Pass initial position to the server state
This commit is contained in:
Teemu Ollakka
2018-06-29 11:54:33 +03:00
parent 666eccf463
commit 0851970c53
15 changed files with 137 additions and 25 deletions
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60
src/server_state.cpp
View File

@@ -43,6 +43,18 @@ namespace
return oss.str();
}
//
// This method is used to deal with historical burden of several
// ways to bootstrap the cluster. Bootstrap happens if
//
// * bootstrap option is given
// * cluster_address is "gcomm://" (Galera provider)
//
bool is_bootstrap(const std::string& cluster_address, bool bootstrap)
{
return (bootstrap || cluster_address == "gcomm://");
}
int apply_write_set(wsrep::server_state& server_state,
wsrep::client_state& client_state,
const wsrep::ws_handle& ws_handle,
@@ -242,7 +254,10 @@ namespace
int wsrep::server_state::load_provider(const std::string& provider_spec,
const std::string& provider_options)
{
wsrep::log_info() << "Loading provider " << provider_spec;
wsrep::log_info() << "Loading provider "
<< provider_spec
<< "initial position: "
<< initial_position_;
provider_ = wsrep::provider::make_provider(
*this, provider_spec, provider_options);
return (provider_ ? 0 : 1);
@@ -259,8 +274,10 @@ int wsrep::server_state::connect(const std::string& cluster_name,
const std::string& state_donor,
bool bootstrap)
{
bootstrap_ = is_bootstrap(cluster_address, bootstrap);
wsrep::log_info() << "Connecting with bootstrap option: " << bootstrap_;
return provider().connect(cluster_name, cluster_address, state_donor,
bootstrap);
bootstrap_);
}
int wsrep::server_state::disconnect()
@@ -468,18 +485,11 @@ wsrep::gtid wsrep::server_state::last_committed_gtid() const
return last_committed_gtid_;
}
int wsrep::server_state::wait_for_gtid(const wsrep::gtid& gtid) const
enum wsrep::provider::status
wsrep::server_state::wait_for_gtid(const wsrep::gtid& gtid, int timeout)
const
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
if (gtid.id() != last_committed_gtid_.id())
{
return 1;
}
while (last_committed_gtid_.seqno() < gtid.seqno())
{
cond_.wait(lock);
}
return 0;
return provider_->wait_for_gtid(gtid, timeout);
}
enum wsrep::provider::status
@@ -522,8 +532,20 @@ void wsrep::server_state::on_view(const wsrep::view& view)
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
assert(view.final() == false);
// Cluster was bootstrapped
if (state_ == s_connected && view.members().size() == 1)
//
// Reached primary from connected state. This may mean the following
//
// 1) Server was joined to the cluster and got SST transfer
// 2) Server was partitioned from the cluster and got back
// 3) A new cluster was bootstrapped from non-prim cluster
//
// There is no enough information here what was the cause
// of the primary component, so we need to walk through
// all states leading to joined to notify possible state
// waiters in other threads.
//
if (state_ == s_connected)
{
state(lock, s_joiner);
state(lock, s_initializing);
@@ -531,12 +553,16 @@ void wsrep::server_state::on_view(const wsrep::view& view)
if (init_initialized_ == false)
{
// DBMS has not been initialized yet
wait_until_state(lock, s_initialized);
}
assert(init_initialized_);
if (bootstrap_)
{
server_service_.bootstrap();
bootstrap_ = false;
}
if (state_ == s_initialized)
{
state(lock, s_joined);