342 lines
8.2 KiB
C++
342 lines
8.2 KiB
C++
/*
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Copyright (c) 2008, 2014, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "atrt.hpp"
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#include <AtrtClient.hpp>
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MYSQL* find_atrtdb_client(atrt_config& config)
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{
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atrt_cluster* cluster = 0;
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for (unsigned i = 0; i<config.m_clusters.size(); i++)
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{
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if (strcmp(config.m_clusters[i]->m_name.c_str(), ".atrt") == 0)
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{
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cluster = config.m_clusters[i];
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for (unsigned i = 0; i<cluster->m_processes.size(); i++)
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{
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if (cluster->m_processes[i]->m_type == atrt_process::AP_CLIENT)
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{
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atrt_process* atrt_client= cluster->m_processes[i];
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if (!atrt_client)
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return NULL; /* No atrt db */
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atrt_process* f_mysqld = atrt_client->m_mysqld;
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require(f_mysqld);
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return &f_mysqld->m_mysql;
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}
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}
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break;
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}
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}
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return NULL;
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}
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static bool
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ack_command(AtrtClient& atrtdb, int command_id, const char* state)
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{
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BaseString sql;
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sql.assfmt("UPDATE command SET state = '%s' WHERE id = %d",
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state, command_id);
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return atrtdb.doQuery(sql);
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}
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BaseString
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set_env_var(const BaseString& existing,
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const BaseString& name,
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const BaseString& value)
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{
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/* Split existing on space
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* (may have issues with env vars with spaces)
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* Split assignments on =
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* Where name == name, output new value
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*/
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BaseString newEnv;
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Vector<BaseString> assignments;
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int assignmentCount = existing.split(assignments, BaseString(" "));
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for (int i=0; i < assignmentCount; i++)
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{
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Vector<BaseString> terms;
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int termCount = assignments[i].split(terms, BaseString("="));
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if (termCount)
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{
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if (strcmp(name.c_str(), terms[0].c_str()) == 0)
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{
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/* Found element */
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newEnv.append(name);
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newEnv.append('=');
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newEnv.append(value);
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}
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else
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{
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newEnv.append(assignments[i]);
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}
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}
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newEnv.append(' ');
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}
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return newEnv;
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}
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static
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char *
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dirname(const char * path)
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{
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char * s = strdup(path);
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size_t len = strlen(s);
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for (size_t i = 1; i<len; i++)
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{
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if (s[len - i] == '/')
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{
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s[len - i] = 0;
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return s;
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}
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}
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free(s);
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return 0;
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}
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Vector<atrt_process> g_saved_procs;
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static
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bool
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do_change_version(atrt_config& config, SqlResultSet& command,
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AtrtClient& atrtdb){
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/**
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* TODO make option to restart "not" initial
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*/
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uint process_id= command.columnAsInt("process_id");
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const char* process_args= command.column("process_args");
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g_logger.info("Change version for process: %d, args: %s",
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process_id, process_args);
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// Get the process
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if (process_id > config.m_processes.size()){
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g_logger.critical("Invalid process id %d", process_id);
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return false;
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}
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atrt_process& proc= *config.m_processes[process_id];
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const char* new_prefix= g_prefix1 ? g_prefix1 : g_prefix;
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const char* old_prefix= g_prefix;
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const char *start= strstr(proc.m_proc.m_path.c_str(), old_prefix);
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if (!start){
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/* Process path does not contain old prefix.
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* Perhaps it contains the new prefix - e.g. is already
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* upgraded?
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*/
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if (strstr(proc.m_proc.m_path.c_str(), new_prefix))
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{
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/* Process is already upgraded, *assume* that this
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* is ok
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* Alternatives could be - error, or downgrade.
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*/
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g_logger.info("Process already upgraded");
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return true;
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}
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g_logger.critical("Could not find '%s' in '%s'",
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old_prefix, proc.m_proc.m_path.c_str());
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return false;
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}
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// Save current proc state
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if (proc.m_save.m_saved == false)
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{
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proc.m_save.m_proc= proc.m_proc;
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proc.m_save.m_saved= true;
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}
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g_logger.info("stopping process...");
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if (!stop_process(proc))
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return false;
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BaseString newEnv = set_env_var(proc.m_proc.m_env,
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BaseString("MYSQL_BASE_DIR"),
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BaseString(new_prefix));
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proc.m_proc.m_env.assign(newEnv);
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ssize_t pos = proc.m_proc.m_path.lastIndexOf('/') + 1;
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BaseString exename(proc.m_proc.m_path.substr(pos));
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char * exe = find_bin_path(new_prefix, exename.c_str());
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proc.m_proc.m_path = exe;
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if (exe)
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{
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free(exe);
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}
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if (process_args && strlen(process_args))
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{
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/* Beware too long args */
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proc.m_proc.m_args.append(" ");
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proc.m_proc.m_args.append(process_args);
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}
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{
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/**
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* In 5.5...binaries aren't compiled with rpath
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* So we need an explicit LD_LIBRARY_PATH
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* So when upgrading..we need to change LD_LIBRARY_PATH
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* So I hate 5.5...
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*/
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#if defined(__MACH__)
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ssize_t p0 = proc.m_proc.m_env.indexOf(" DYLD_LIBRARY_PATH=");
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#else
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ssize_t p0 = proc.m_proc.m_env.indexOf(" LD_LIBRARY_PATH=");
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#endif
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ssize_t p1 = proc.m_proc.m_env.indexOf(' ', p0 + 1);
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BaseString part0 = proc.m_proc.m_env.substr(0, p0);
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BaseString part1 = proc.m_proc.m_env.substr(p1);
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proc.m_proc.m_env.assfmt("%s%s",
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part0.c_str(),
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part1.c_str());
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BaseString lib(g_libmysqlclient_so_path);
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ssize_t pos = lib.lastIndexOf('/') + 1;
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BaseString libname(lib.substr(pos));
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char * exe = find_bin_path(new_prefix, libname.c_str());
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char * dir = dirname(exe);
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#if defined(__MACH__)
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proc.m_proc.m_env.appfmt(" DYLD_LIBRARY_PATH=%s", dir);
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#else
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proc.m_proc.m_env.appfmt(" LD_LIBRARY_PATH=%s", dir);
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#endif
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free(exe);
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free(dir);
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}
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ndbout << proc << endl;
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g_logger.info("starting process...");
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if (!start_process(proc))
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return false;
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return true;
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}
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static
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bool
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do_reset_proc(atrt_config& config, SqlResultSet& command,
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AtrtClient& atrtdb){
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uint process_id= command.columnAsInt("process_id");
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g_logger.info("Reset process: %d", process_id);
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// Get the process
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if (process_id > config.m_processes.size()){
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g_logger.critical("Invalid process id %d", process_id);
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return false;
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}
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atrt_process& proc= *config.m_processes[process_id];
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g_logger.info("stopping process...");
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if (!stop_process(proc))
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return false;
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if (proc.m_save.m_saved)
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{
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ndbout << "before: " << proc << endl;
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proc.m_proc= proc.m_save.m_proc;
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proc.m_save.m_saved= false;
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proc.m_proc.m_id= -1;
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ndbout << "after: " << proc << endl;
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}
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else
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{
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ndbout << "process has not changed" << endl;
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}
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g_logger.info("starting process...");
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if (!start_process(proc))
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return false;
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return true;
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}
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bool
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do_command(atrt_config& config){
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#ifdef _WIN32
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return true;
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#endif
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MYSQL* mysql= find_atrtdb_client(config);
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if (!mysql)
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return true;
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AtrtClient atrtdb(mysql);
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SqlResultSet command;
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if (!atrtdb.doQuery("SELECT * FROM command " \
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"WHERE state = 'new' ORDER BY id LIMIT 1", command)){
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g_logger.critical("query failed");
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return false;
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}
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if (command.numRows() == 0)
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return true;
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uint id= command.columnAsInt("id");
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uint cmd= command.columnAsInt("cmd");
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g_logger.info("Got command, id: %d, cmd: %d", id, cmd);
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// command.print();
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// Set state of command to running
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if (!ack_command(atrtdb, id, "running"))
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return false;
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switch (cmd){
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case AtrtClient::ATCT_CHANGE_VERSION:
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if (!do_change_version(config, command, atrtdb))
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return false;
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break;
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case AtrtClient::ATCT_RESET_PROC:
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if (!do_reset_proc(config, command, atrtdb))
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return false;
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break;
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default:
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command.print();
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g_logger.error("got unknown command: %d", cmd);
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return false;
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}
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// Set state of command to done
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if (!ack_command(atrtdb, id, "done"))
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return false;
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g_logger.info("done!");
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return true;
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}
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template class Vector<atrt_process>;
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