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broker.c
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broker.c
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/*****************************************************************************\
* Copyright (c) 2014 Lawrence Livermore National Security, LLC. Produced at
* the Lawrence Livermore National Laboratory (cf, AUTHORS, DISCLAIMER.LLNS).
* LLNL-CODE-658032 All rights reserved.
*
* This file is part of the Flux resource manager framework.
* For details, see https://github.com/flux-framework.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the license, or (at your option)
* any later version.
*
* Flux is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the IMPLIED WARRANTY OF MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the terms and conditions of the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
* See also: http://www.gnu.org/licenses/
\*****************************************************************************/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <libgen.h>
#include <sys/types.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/prctl.h>
#include <sys/signalfd.h>
#include <unistd.h>
#include <sys/param.h>
#include <stdbool.h>
#include <dlfcn.h>
#include <argz.h>
#include <flux/core.h>
#include <czmq.h>
#if HAVE_CALIPER
#include <caliper/cali.h>
#include <sys/syscall.h>
#endif
#include "src/common/libutil/log.h"
#include "src/common/libutil/xzmalloc.h"
#include "src/common/libutil/cleanup.h"
#include "src/common/libutil/nodeset.h"
#include "src/common/libutil/ipaddr.h"
#include "src/common/libutil/shortjson.h"
#include "src/common/libutil/kary.h"
#include "src/common/libutil/monotime.h"
#include "src/common/libpmi/pmi.h"
#include "src/common/libpmi/pmi_strerror.h"
#include "src/common/libsubprocess/zio.h"
#include "src/common/libsubprocess/subprocess.h"
#include "heartbeat.h"
#include "module.h"
#include "overlay.h"
#include "service.h"
#include "hello.h"
#include "shutdown.h"
#include "attr.h"
#include "sequence.h"
#include "log.h"
#include "content-cache.h"
#include "runlevel.h"
#include "heaptrace.h"
#include "exec.h"
#include "ping.h"
#include "rusage.h"
/* Generally accepted max, although some go higher (IE is 2083) */
#define ENDPOINT_MAX 2048
typedef enum {
ERROR_MODE_RESPOND,
ERROR_MODE_RETURN,
} request_error_mode_t;
struct tbon_param {
int k;
int level;
int maxlevel;
int descendants;
};
typedef struct {
/* 0MQ
*/
flux_sec_t *sec; /* security context (MT-safe) */
/* Reactor
*/
flux_t *h;
flux_reactor_t *reactor;
zlist_t *sigwatchers;
/* Sockets.
*/
overlay_t *overlay;
/* Session parameters
*/
uint32_t size; /* session size */
uint32_t rank; /* our rank in session */
attr_t *attrs;
uint32_t userid; /* instance owner */
uint32_t rolemask;
/* Modules
*/
modhash_t *modhash;
/* Misc
*/
bool verbose;
bool quiet;
pid_t pid;
char *proctitle;
int event_recv_seq;
int event_send_seq;
bool event_active; /* primary event source is active */
svchash_t *services;
heartbeat_t *heartbeat;
shutdown_t *shutdown;
double shutdown_grace;
zlist_t *subscriptions; /* subscripts for internal services */
content_cache_t *cache;
struct tbon_param tbon;
/* Bootstrap
*/
hello_t *hello;
flux_t *enclosing_h;
runlevel_t *runlevel;
/* Subprocess management
*/
struct subprocess_manager *sm;
char *init_shell_cmd;
size_t init_shell_cmd_len;
struct subprocess *init_shell;
} broker_ctx_t;
static int broker_event_sendmsg (broker_ctx_t *ctx, const flux_msg_t *msg);
static int broker_response_sendmsg (broker_ctx_t *ctx, const flux_msg_t *msg);
static int broker_request_sendmsg (broker_ctx_t *ctx, const flux_msg_t *msg,
request_error_mode_t errmode);
static void event_cb (overlay_t *ov, void *sock, void *arg);
static void parent_cb (overlay_t *ov, void *sock, void *arg);
static void child_cb (overlay_t *ov, void *sock, void *arg);
static void module_cb (module_t *p, void *arg);
static void module_status_cb (module_t *p, int prev_state, void *arg);
static void hello_update_cb (hello_t *h, void *arg);
static void shutdown_cb (shutdown_t *s, bool expired, void *arg);
static void signal_cb (flux_reactor_t *r, flux_watcher_t *w,
int revents, void *arg);
static void broker_handle_signals (broker_ctx_t *ctx, zlist_t *sigwatchers);
static void broker_unhandle_signals (zlist_t *sigwatchers);
static void broker_add_services (broker_ctx_t *ctx);
static int load_module_byname (broker_ctx_t *ctx, const char *name,
const char *argz, size_t argz_len,
const flux_msg_t *request);
static int unload_module_byname (broker_ctx_t *ctx, const char *name,
const flux_msg_t *request, bool async);
static void update_proctitle (broker_ctx_t *ctx);
static void runlevel_cb (runlevel_t *r, int level, int rc, double elapsed,
const char *state, void *arg);
static void runlevel_io_cb (runlevel_t *r, const char *name,
const char *msg, void *arg);
static int create_persistdir (attr_t *attrs, uint32_t rank);
static int create_rundir (attr_t *attrs);
static int create_dummyattrs (flux_t *h, uint32_t rank, uint32_t size);
static char *calc_endpoint (broker_ctx_t *ctx, const char *endpoint);
static int boot_pmi (broker_ctx_t *ctx, double *elapsed_sec);
static int attr_get_overlay (const char *name, const char **val, void *arg);
static void init_attrs (broker_ctx_t *ctx);
static const struct flux_handle_ops broker_handle_ops;
static int exit_rc = 0;
#define OPTIONS "+vqM:X:k:s:g:EIS:"
static const struct option longopts[] = {
{"verbose", no_argument, 0, 'v'},
{"quiet", no_argument, 0, 'q'},
{"security", required_argument, 0, 's'},
{"module-path", required_argument, 0, 'X'},
{"k-ary", required_argument, 0, 'k'},
{"heartrate", required_argument, 0, 'H'},
{"shutdown-grace", required_argument, 0, 'g'},
{"setattr", required_argument, 0, 'S'},
{0, 0, 0, 0},
};
static void usage (void)
{
fprintf (stderr,
"Usage: flux-broker OPTIONS [initial-command ...]\n"
" -v,--verbose Be annoyingly verbose\n"
" -q,--quiet Be mysteriously taciturn\n"
" -X,--module-path PATH Set module search path (colon separated)\n"
" -s,--security=plain|curve|none Select security mode (default: curve)\n"
" -k,--k-ary K Wire up in a k-ary tree\n"
" -H,--heartrate SECS Set heartrate in seconds (rank 0 only)\n"
" -g,--shutdown-grace SECS Set shutdown grace period in seconds\n"
" -S,--setattr ATTR=VAL Set broker attribute\n"
);
exit (1);
}
static int setup_profiling (const char *program, int rank)
{
#if HAVE_CALIPER
cali_begin_string_byname ("flux.type", "main");
cali_begin_int_byname ("flux.tid", syscall (SYS_gettid));
cali_begin_string_byname ("binary", program);
cali_begin_int_byname ("flux.rank", rank);
// TODO: this is a stopgap until we have better control over
// instrumemtation in child processes. If we want to see what children
// that load libflux are up to, this should be disabled
unsetenv ("CALI_SERVICES_ENABLE");
unsetenv ("CALI_CONFIG_PROFILE");
#endif
return (0);
}
int main (int argc, char *argv[])
{
int c;
broker_ctx_t ctx;
zlist_t *sigwatchers;
int sec_typemask = FLUX_SEC_TYPE_CURVE | FLUX_SEC_TYPE_MUNGE;
int e;
char *endptr;
sigset_t old_sigmask;
struct sigaction old_sigact_int;
struct sigaction old_sigact_term;
memset (&ctx, 0, sizeof (ctx));
log_init (argv[0]);
if (!(sigwatchers = zlist_new ()))
oom ();
ctx.rank = FLUX_NODEID_ANY;
ctx.modhash = modhash_create ();
ctx.services = svchash_create ();
ctx.overlay = overlay_create ();
ctx.hello = hello_create ();
ctx.tbon.k = 2; /* binary TBON is default */
ctx.heartbeat = heartbeat_create ();
ctx.shutdown = shutdown_create ();
ctx.attrs = attr_create ();
if (!(ctx.subscriptions = zlist_new ()))
oom ();
if (!(ctx.cache = content_cache_create ()))
oom ();
if (!(ctx.runlevel = runlevel_create ()))
oom ();
ctx.pid = getpid();
init_attrs (&ctx);
if (!(ctx.sm = subprocess_manager_create ()))
oom ();
subprocess_manager_set (ctx.sm, SM_WAIT_FLAGS, WNOHANG);
while ((c = getopt_long (argc, argv, OPTIONS, longopts, NULL)) != -1) {
switch (c) {
case 's': /* --security=MODE */
if (!strcmp (optarg, "none")) {
sec_typemask = 0;
} else if (!strcmp (optarg, "plain")) {
sec_typemask |= FLUX_SEC_TYPE_PLAIN;
sec_typemask &= ~FLUX_SEC_TYPE_CURVE;
} else if (!strcmp (optarg, "curve")) {
sec_typemask |= FLUX_SEC_TYPE_CURVE;
sec_typemask &= ~FLUX_SEC_TYPE_PLAIN;
} else {
log_msg_exit ("--security arg must be none|plain|curve");
}
break;
case 'v': /* --verbose */
ctx.verbose = true;
break;
case 'q': /* --quiet */
ctx.quiet = true;
break;
case 'X': /* --module-path PATH */
if (attr_set (ctx.attrs, "conf.module_path", optarg, true) < 0)
log_err_exit ("setting conf.module_path attribute");
break;
case 'k': /* --k-ary k */
errno = 0;
ctx.tbon.k = strtoul (optarg, &endptr, 10);
if (errno || *endptr != '\0')
log_err_exit ("k-ary '%s'", optarg);
if (ctx.tbon.k < 1)
usage ();
break;
case 'H': /* --heartrate SECS */
if (heartbeat_set_ratestr (ctx.heartbeat, optarg) < 0)
log_err_exit ("heartrate `%s'", optarg);
break;
case 'g': /* --shutdown-grace SECS */
errno = 0;
ctx.shutdown_grace = strtod (optarg, &endptr);
if (errno || *endptr != '\0')
log_err_exit ("shutdown-grace '%s'", optarg);
if (ctx.shutdown_grace < 0)
usage ();
break;
case 'S': { /* --setattr ATTR=VAL */
char *val, *attr = xstrdup (optarg);
if ((val = strchr (attr, '=')))
*val++ = '\0';
if (attr_add (ctx.attrs, attr, val, 0) < 0)
if (attr_set (ctx.attrs, attr, val, true) < 0)
log_err_exit ("setattr %s=%s", attr, val);
free (attr);
break;
}
default:
usage ();
}
}
if (optind < argc) {
if ((e = argz_create (argv + optind, &ctx.init_shell_cmd, &ctx.init_shell_cmd_len)) != 0)
log_errn_exit (e, "argz_create");
}
/* Record the instance owner: the effective uid of the broker.
* Set default rolemask for messages sent with flux_send()
* on the broker's internal handle.
*/
ctx.userid = geteuid ();
ctx.rolemask = FLUX_ROLE_OWNER;
/* Connect to enclosing instance, if any.
*/
if (getenv ("FLUX_URI")) {
if (!(ctx.enclosing_h = flux_open (NULL, 0)))
log_err_exit ("flux_open enclosing instance");
}
/* Block all signals, saving old mask and actions for SIGINT, SIGTERM.
*/
sigset_t sigmask;
sigfillset (&sigmask);
if (sigprocmask (SIG_SETMASK, &sigmask, &old_sigmask) < 0)
log_err_exit ("sigprocmask");
if (sigaction (SIGINT, NULL, &old_sigact_int) < 0)
log_err_exit ("sigaction");
if (sigaction (SIGTERM, NULL, &old_sigact_term) < 0)
log_err_exit ("sigaction");
/* Initailize zeromq context
*/
if (!zsys_init ())
log_err_exit ("zsys_init");
zsys_set_logstream (stderr);
zsys_set_logident ("flux-broker");
zsys_handler_set (NULL);
zsys_set_linger (5);
zsys_set_rcvhwm (0);
zsys_set_sndhwm (0);
/* Set up the flux reactor.
*/
if (!(ctx.reactor = flux_reactor_create (FLUX_REACTOR_SIGCHLD)))
log_err_exit ("flux_reactor_create");
/* Set up flux handle.
* The handle is used for simple purposes such as logging.
*/
if (!(ctx.h = flux_handle_create (&ctx, &broker_handle_ops, 0)))
log_err_exit ("flux_handle_create");
if (flux_set_reactor (ctx.h, ctx.reactor) < 0)
log_err_exit ("flux_set_reactor");
subprocess_manager_set (ctx.sm, SM_REACTOR, ctx.reactor);
/* Prepare signal handling
*/
broker_handle_signals (&ctx, sigwatchers);
/* Initialize security context.
*/
const char *keydir;
if (attr_get (ctx.attrs, "security.keydir", &keydir, NULL) < 0)
log_err_exit ("getattr security.keydir");
if (!(ctx.sec = flux_sec_create (sec_typemask, keydir)))
log_err_exit ("flux_sec_create");
if (flux_sec_comms_init (ctx.sec) < 0)
log_msg_exit ("flux_sec_comms_init: %s", flux_sec_errstr (ctx.sec));
overlay_set_sec (ctx.overlay, ctx.sec);
overlay_set_flux (ctx.overlay, ctx.h);
overlay_set_parent_cb (ctx.overlay, parent_cb, &ctx);
overlay_set_child_cb (ctx.overlay, child_cb, &ctx);
overlay_set_event_cb (ctx.overlay, event_cb, &ctx);
/* Boot with PMI.
*/
double pmi_elapsed_sec;
if (boot_pmi (&ctx, &pmi_elapsed_sec) < 0)
log_msg_exit ("bootstrap failed");
assert (ctx.rank != FLUX_NODEID_ANY);
assert (ctx.size > 0);
assert (attr_get (ctx.attrs, "session-id", NULL, NULL) == 0);
ctx.tbon.level = kary_levelof (ctx.tbon.k, ctx.rank);
ctx.tbon.maxlevel = kary_levelof (ctx.tbon.k, ctx.size - 1);
ctx.tbon.descendants = kary_sum_descendants (ctx.tbon.k, ctx.size, ctx.rank);
if (ctx.verbose) {
const char *sid = "unknown";
(void)attr_get (ctx.attrs, "session-id", &sid, NULL);
log_msg ("boot: rank=%d size=%d session-id=%s", ctx.rank, ctx.size, sid);
}
if (attr_set_flags (ctx.attrs, "session-id", FLUX_ATTRFLAG_IMMUTABLE) < 0)
log_err_exit ("attr_set_flags session-id");
// Setup profiling
setup_profiling (argv[0], ctx.rank);
/* Create/validate runtime directory (this function is idempotent)
*/
if (create_rundir (ctx.attrs) < 0)
log_err_exit ("create_rundir");
/* If persist-filesystem or persist-directory are set, initialize those,
* but only on rank 0.
*/
if (create_persistdir (ctx.attrs, ctx.rank) < 0)
log_err_exit ("create_persistdir");
/* Initialize logging.
* OK to call flux_log*() after this.
*/
logbuf_initialize (ctx.h, ctx.rank, ctx.attrs);
/* Allow flux_get_rank() and flux_get_size() to work in the broker.
*/
if (create_dummyattrs (ctx.h, ctx.rank, ctx.size) < 0)
log_err_exit ("creating dummy attributes");
overlay_set_rank (ctx.overlay, ctx.rank);
/* Registers message handlers and obtains rank.
*/
if (content_cache_set_flux (ctx.cache, ctx.h) < 0)
log_err_exit ("content_cache_set_flux");
content_cache_set_enclosing_flux (ctx.cache, ctx.enclosing_h);
/* Configure attributes.
*/
if (attr_add_active (ctx.attrs, "tbon.parent-endpoint-uri", 0,
attr_get_overlay, NULL, ctx.overlay) < 0
|| attr_add_active (ctx.attrs, "tbon.endpoint-uri",
FLUX_ATTRFLAG_IMMUTABLE,
attr_get_overlay, NULL, ctx.overlay) < 0
|| attr_add_active (ctx.attrs, "mcast.endpoint-uri",
FLUX_ATTRFLAG_IMMUTABLE,
attr_get_overlay, NULL, ctx.overlay) < 0
|| attr_add_active (ctx.attrs, "mcast.relay-endpoint-uri",
FLUX_ATTRFLAG_IMMUTABLE,
attr_get_overlay, NULL, ctx.overlay) < 0
|| attr_add_active_uint32 (ctx.attrs, "rank", &ctx.rank,
FLUX_ATTRFLAG_IMMUTABLE) < 0
|| attr_add_active_uint32 (ctx.attrs, "size", &ctx.size,
FLUX_ATTRFLAG_IMMUTABLE) < 0
|| attr_add_active_int (ctx.attrs, "tbon.arity", &ctx.tbon.k,
FLUX_ATTRFLAG_IMMUTABLE) < 0
|| attr_add_active_int (ctx.attrs, "tbon.level", &ctx.tbon.level,
FLUX_ATTRFLAG_IMMUTABLE) < 0
|| attr_add_active_int (ctx.attrs, "tbon.maxlevel",
&ctx.tbon.maxlevel,
FLUX_ATTRFLAG_IMMUTABLE) < 0
|| attr_add_active_int (ctx.attrs, "tbon.descendants",
&ctx.tbon.descendants,
FLUX_ATTRFLAG_IMMUTABLE) < 0
|| hello_register_attrs (ctx.hello, ctx.attrs) < 0
|| content_cache_register_attrs (ctx.cache, ctx.attrs) < 0) {
log_err_exit ("configuring attributes");
}
if (ctx.rank == 0) {
if (runlevel_register_attrs (ctx.runlevel, ctx.attrs) < 0)
log_err_exit ("configuring runlevel attributes");
}
flux_log (ctx.h, LOG_INFO, "pmi: bootstrap time %.1fs", pmi_elapsed_sec);
/* The previous value of FLUX_URI (refers to enclosing instance)
* was stored above. Clear it here so a connection to the enclosing
* instance is not made inadvertantly.
*/
unsetenv ("FLUX_URI");
/* If Flux was launched by Flux, now that PMI bootstrap is complete,
* unset Flux job environment variables since they don't leak into
* the jobs other children of this instance.
*/
unsetenv ("FLUX_JOB_ID");
unsetenv ("FLUX_JOB_SIZE");
unsetenv ("FLUX_JOB_NNODES");
/* If shutdown_grace was not provided on the command line,
* make a guess.
*/
if (ctx.shutdown_grace == 0) {
if (ctx.size < 16)
ctx.shutdown_grace = 1;
else if (ctx.size < 128)
ctx.shutdown_grace = 2;
else if (ctx.size < 1024)
ctx.shutdown_grace = 4;
else
ctx.shutdown_grace = 10;
}
if (ctx.verbose) {
const char *parent = overlay_get_parent (ctx.overlay);
const char *child = overlay_get_child (ctx.overlay);
const char *event = overlay_get_event (ctx.overlay);
const char *relay = overlay_get_relay (ctx.overlay);
log_msg ("parent: %s", parent ? parent : "none");
log_msg ("child: %s", child ? child : "none");
log_msg ("event: %s", event ? event : "none");
log_msg ("relay: %s", relay ? relay : "none");
}
update_proctitle (&ctx);
if (ctx.rank == 0) {
const char *rc1, *rc3, *pmi, *uri;
const char *rc2 = ctx.init_shell_cmd;
size_t rc2_len = ctx.init_shell_cmd_len;
if (attr_get (ctx.attrs, "local-uri", &uri, NULL) < 0)
log_err_exit ("local-uri is not set");
if (attr_get (ctx.attrs, "broker.rc1_path", &rc1, NULL) < 0)
log_err_exit ("conf.rc1_path is not set");
if (attr_get (ctx.attrs, "broker.rc3_path", &rc3, NULL) < 0)
log_err_exit ("conf.rc3_path is not set");
if (attr_get (ctx.attrs, "conf.pmi_library_path", &pmi, NULL) < 0)
log_err_exit ("conf.pmi_library_path is not set");
runlevel_set_size (ctx.runlevel, ctx.size);
runlevel_set_subprocess_manager (ctx.runlevel, ctx.sm);
runlevel_set_callback (ctx.runlevel, runlevel_cb, &ctx);
runlevel_set_io_callback (ctx.runlevel, runlevel_io_cb, &ctx);
if (runlevel_set_rc (ctx.runlevel, 1, rc1, rc1 ? strlen (rc1) + 1 : 0, uri) < 0)
log_err_exit ("runlevel_set_rc 1");
if (runlevel_set_rc (ctx.runlevel, 2, rc2, rc2_len, uri) < 0)
log_err_exit ("runlevel_set_rc 2");
if (runlevel_set_rc (ctx.runlevel, 3, rc3, rc3 ? strlen (rc3) + 1 : 0, uri) < 0)
log_err_exit ("runlevel_set_rc 3");
}
/* Wire up the overlay.
*/
if (ctx.verbose)
log_msg ("initializing overlay sockets");
if (overlay_bind (ctx.overlay) < 0) /* idempotent */
log_err_exit ("overlay_bind");
if (overlay_connect (ctx.overlay) < 0)
log_err_exit ("overlay_connect");
{
const char *rundir;
if (attr_get (ctx.attrs, "broker.rundir", &rundir, NULL) < 0) {
log_msg_exit ("broker.rundir attribute is not set");
}
}
shutdown_set_handle (ctx.shutdown, ctx.h);
shutdown_set_callback (ctx.shutdown, shutdown_cb, &ctx);
/* Register internal services
*/
if (attr_register_handlers (ctx.attrs, ctx.h) < 0)
log_err_exit ("attr_register_handlers");
if (heaptrace_initialize (ctx.h) < 0)
log_msg_exit ("heaptrace_initialize");
if (sequence_hash_initialize (ctx.h) < 0)
log_err_exit ("sequence_hash_initialize");
if (exec_initialize (ctx.h, ctx.sm, ctx.rank, ctx.attrs) < 0)
log_err_exit ("exec_initialize");
if (ping_initialize (ctx.h, "cmb") < 0)
log_err_exit ("ping_initialize");
if (rusage_initialize (ctx.h) < 0)
log_err_exit ("rusage_initialize");
broker_add_services (&ctx);
/* Initialize comms module infrastructure.
*/
if (ctx.verbose)
log_msg ("initializing modules");
modhash_set_rank (ctx.modhash, ctx.rank);
modhash_set_flux (ctx.modhash, ctx.h);
modhash_set_heartbeat (ctx.modhash, ctx.heartbeat);
/* Load the local connector module.
* Other modules will be loaded in rc1 using flux module,
* which uses the local connector.
*/
if (ctx.verbose)
log_msg ("loading connector-local");
if (load_module_byname (&ctx, "connector-local", NULL, 0, NULL) < 0)
log_err_exit ("load_module connector-local");
/* install heartbeat (including timer on rank 0)
*/
heartbeat_set_flux (ctx.heartbeat, ctx.h);
if (heartbeat_set_attrs (ctx.heartbeat, ctx.attrs) < 0)
log_err_exit ("initializing heartbeat attributes");
if (heartbeat_start (ctx.heartbeat) < 0)
log_err_exit ("heartbeat_start");
if (ctx.rank == 0 && ctx.verbose)
log_msg ("installing session heartbeat: T=%0.1fs",
heartbeat_get_rate (ctx.heartbeat));
/* Send hello message to parent.
* N.B. uses tbon topology attributes set above.
* Start init once wireup is complete.
*/
hello_set_flux (ctx.hello, ctx.h);
hello_set_callback (ctx.hello, hello_update_cb, &ctx);
if (hello_start (ctx.hello) < 0)
log_err_exit ("hello_start");
/* Event loop
*/
if (ctx.verbose)
log_msg ("entering event loop");
if (flux_reactor_run (ctx.reactor, 0) < 0)
log_err ("flux_reactor_run");
if (ctx.verbose)
log_msg ("exited event loop");
/* Restore default sigmask and actions for SIGINT, SIGTERM
*/
if (sigprocmask (SIG_SETMASK, &old_sigmask, NULL) < 0)
log_err_exit ("sigprocmask");
if (sigaction (SIGINT, &old_sigact_int, NULL) < 0)
log_err_exit ("sigaction");
if (sigaction (SIGTERM, &old_sigact_term, NULL) < 0)
log_err_exit ("sigaction");
/* remove heartbeat timer, if any
*/
heartbeat_stop (ctx.heartbeat);
/* Unload modules.
*/
if (ctx.verbose)
log_msg ("unloading connector-local");
if (unload_module_byname (&ctx, "connector-local", NULL, false) < 0)
log_err ("unload connector-local");
if (ctx.verbose)
log_msg ("finalizing modules");
modhash_destroy (ctx.modhash);
/* Unregister builtin services
*/
attr_unregister_handlers ();
content_cache_destroy (ctx.cache);
broker_unhandle_signals (sigwatchers);
zlist_destroy (&sigwatchers);
if (ctx.verbose)
log_msg ("cleaning up");
if (ctx.enclosing_h)
flux_close (ctx.enclosing_h);
if (ctx.sec)
flux_sec_destroy (ctx.sec);
overlay_destroy (ctx.overlay);
heartbeat_destroy (ctx.heartbeat);
svchash_destroy (ctx.services);
hello_destroy (ctx.hello);
attr_destroy (ctx.attrs);
flux_close (ctx.h);
flux_reactor_destroy (ctx.reactor);
zlist_destroy (&ctx.subscriptions);
runlevel_destroy (ctx.runlevel);
return exit_rc;
}
struct attrmap {
const char *env;
const char *attr;
uint8_t required:1;
};
static struct attrmap attrmap[] = {
{ "FLUX_EXEC_PATH", "conf.exec_path", 1 },
{ "FLUX_CONNECTOR_PATH", "conf.connector_path", 1 },
{ "FLUX_MODULE_PATH", "conf.module_path", 1 },
{ "FLUX_PMI_LIBRARY_PATH", "conf.pmi_library_path", 1 },
{ "FLUX_RC1_PATH", "broker.rc1_path", 1 },
{ "FLUX_RC3_PATH", "broker.rc3_path", 1 },
{ "FLUX_WRECK_LUA_PATTERN", "wrexec.lua_pattern", 1 },
{ "FLUX_WREXECD_PATH", "wrexec.wrexecd_path", 1 },
{ "FLUX_SEC_DIRECTORY", "security.keydir", 1 },
{ "FLUX_URI", "parent-uri", 0 },
{ NULL, NULL, 0 },
};
static void init_attrs_from_environment (attr_t *attrs)
{
struct attrmap *m;
const char *val;
int flags = 0; // XXX possibly these should be immutable?
// however they weren't before and wreck test depends
// on changing wrexec.lua_pattern
for (m = &attrmap[0]; m->env != NULL; m++) {
val = getenv (m->env);
if (!val && m->required)
log_msg_exit ("required environment variable %s is not set", m->env);
if (attr_add (attrs, m->attr, val, flags) < 0)
log_err_exit ("attr_add %s", m->attr);
}
}
static void init_attrs_overlay (broker_ctx_t *ctx)
{
char *tbonendpoint = "tbon.endpoint";
char *mcastendpoint = "mcast.endpoint";
if (attr_add (ctx->attrs,
tbonendpoint,
"tcp://%h:*",
0) < 0)
log_err_exit ("attr_add %s", tbonendpoint);
if (attr_add (ctx->attrs,
mcastendpoint,
"tbon",
0) < 0)
log_err_exit ("attr_add %s", mcastendpoint);
}
static void init_attrs_broker_pid (broker_ctx_t *ctx)
{
char *attrname = "broker.pid";
char *pidval;
pidval = xasprintf ("%u", ctx->pid);
if (attr_add (ctx->attrs,
attrname,
pidval,
FLUX_ATTRFLAG_IMMUTABLE) < 0)
log_err_exit ("attr_add %s", attrname);
free (pidval);
}
static void init_attrs (broker_ctx_t *ctx)
{
/* Initialize config attrs from environment set up by flux(1)
*/
init_attrs_from_environment (ctx->attrs);
/* Initialize other miscellaneous attrs
*/
init_attrs_overlay (ctx);
init_attrs_broker_pid (ctx);
}
static void hello_update_cb (hello_t *hello, void *arg)
{
broker_ctx_t *ctx = arg;
if (hello_complete (hello)) {
flux_log (ctx->h, LOG_INFO, "wireup: %d/%d (complete) %.1fs",
hello_get_count (hello), ctx->size, hello_get_time (hello));
flux_log (ctx->h, LOG_INFO, "Run level %d starting", 1);
overlay_set_idle_warning (ctx->overlay, 3);
if (runlevel_set_level (ctx->runlevel, 1) < 0)
log_err_exit ("runlevel_set_level 1");
/* FIXME: shutdown hello protocol */
} else {
flux_log (ctx->h, LOG_INFO, "wireup: %d/%d (incomplete) %.1fs",
hello_get_count (hello), ctx->size, hello_get_time (hello));
}
}
/* Currently 'expired' is always true.
*/
static void shutdown_cb (shutdown_t *s, bool expired, void *arg)
{
broker_ctx_t *ctx = arg;
if (expired) {
if (ctx->rank == 0)
exit_rc = shutdown_get_rc (s);
flux_reactor_stop (flux_get_reactor (ctx->h));
}
}
static void update_proctitle (broker_ctx_t *ctx)
{
char *s;
if (asprintf (&s, "flux-broker-%"PRIu32, ctx->rank) < 0)
oom ();
(void)prctl (PR_SET_NAME, s, 0, 0, 0);
if (ctx->proctitle)
free (ctx->proctitle);
ctx->proctitle = s;
}
/* Handle line by line output on stdout, stderr of runlevel subprocess.
*/
static void runlevel_io_cb (runlevel_t *r, const char *name,
const char *msg, void *arg)
{
broker_ctx_t *ctx = arg;
int loglevel = !strcmp (name, "stderr") ? LOG_ERR : LOG_INFO;
int runlevel = runlevel_get_level (r);
flux_log (ctx->h, loglevel, "rc%d: %s", runlevel, msg);
}
/* Handle completion of runlevel subprocess.
*/
static void runlevel_cb (runlevel_t *r, int level, int rc, double elapsed,
const char *exit_string, void *arg)
{
broker_ctx_t *ctx = arg;
int new_level = -1;
flux_log (ctx->h, rc == 0 ? LOG_INFO : LOG_ERR,
"Run level %d %s (rc=%d) %.1fs", level, exit_string, rc, elapsed);
switch (level) {
case 1: /* init completed */
if (rc != 0) {
new_level = 3;
shutdown_arm (ctx->shutdown, ctx->shutdown_grace,
rc, "run level 1 %s", exit_string);
} else
new_level = 2;
break;
case 2: /* initial program completed */
new_level = 3;
shutdown_arm (ctx->shutdown, ctx->shutdown_grace,
rc, "run level 2 %s", exit_string);
break;
case 3: /* finalization completed */
break;
}
if (new_level != -1) {
flux_log (ctx->h, LOG_INFO, "Run level %d starting", new_level);
if (runlevel_set_level (r, new_level) < 0)
log_err_exit ("runlevel_set_level %d", new_level);
}
}
static int create_dummyattrs (flux_t *h, uint32_t rank, uint32_t size)
{
char *s;
s = xasprintf ("%"PRIu32, rank);
if (flux_attr_fake (h, "rank", s, FLUX_ATTRFLAG_IMMUTABLE) < 0)
return -1;
free (s);
s = xasprintf ("%"PRIu32, size);
if (flux_attr_fake (h, "size", s, FLUX_ATTRFLAG_IMMUTABLE) < 0)
return -1;
free (s);
return 0;
}
/* If user set the 'broker.rundir' attribute on the command line,
* validate the directory and its permissions, and set the immutable flag
* on the attribute. If unset, a unique directory and arrange to remove
* it on exit. This function is idempotent.
*/
static int create_rundir (attr_t *attrs)
{
const char *run_dir, *local_uri;
char *dir = NULL;
char *uri = NULL;
int rc = -1;
if (attr_get (attrs, "broker.rundir", &run_dir, NULL) == 0) {
struct stat sb;
if (stat (run_dir, &sb) < 0)
goto done;
if (!S_ISDIR (sb.st_mode)) {
errno = ENOTDIR;
goto done;
}
if ((sb.st_mode & S_IRWXU) != S_IRWXU) {
errno = EPERM;
goto done;
}
if (attr_set_flags (attrs, "broker.rundir", FLUX_ATTRFLAG_IMMUTABLE) < 0)
goto done;
} else {
const char *tmpdir = getenv ("TMPDIR");
dir = xasprintf ("%s/flux-XXXXXX", tmpdir ? tmpdir : "/tmp");
if (!mkdtemp (dir))
goto done;
cleanup_push_string (cleanup_directory, dir);
if (attr_add (attrs, "broker.rundir", dir, FLUX_ATTRFLAG_IMMUTABLE) < 0)
goto done;
run_dir = dir;
}
if (attr_get (attrs, "local-uri", &local_uri, NULL) < 0) {
uri = xasprintf ("local://%s", run_dir);
if (attr_add (attrs, "local-uri", uri,
FLUX_ATTRFLAG_IMMUTABLE) < 0)
goto done;
}
rc = 0;
done:
free (dir);
free (uri);
return rc;
}
/* If 'persist-directory' set, validate it, make it immutable, done.
* If 'persist-filesystem' set, validate it, make it immutable, then:
* Avoid name collisions with other flux tmpdirs used in testing
* e.g. "flux-<sid>-XXXXXX"
*/
static int create_persistdir (attr_t *attrs, uint32_t rank)
{
struct stat sb;
const char *attr = "persist-directory";
const char *sid, *persist_dir, *persist_fs;
char *dir, *tmpl = NULL;
int rc = -1;
if (rank > 0) {
(void) attr_delete (attrs, "persist-filesystem", true);
(void) attr_delete (attrs, "persist-directory", true);
goto done_success;
}
if (attr_get (attrs, attr, &persist_dir, NULL) == 0) {
if (stat (persist_dir, &sb) < 0)
goto done;
if (!S_ISDIR (sb.st_mode)) {
errno = ENOTDIR;
goto done;
}
if ((sb.st_mode & S_IRWXU) != S_IRWXU) {
errno = EPERM;
goto done;
}
if (attr_set_flags (attrs, attr, FLUX_ATTRFLAG_IMMUTABLE) < 0)
goto done;
} else {
if (attr_get (attrs, "session-id", &sid, NULL) < 0) {
errno = EINVAL;
goto done;
}
if (attr_get (attrs, "persist-filesystem", &persist_fs, NULL)< 0) {
goto done_success;
}
if (stat (persist_fs, &sb) < 0)
goto done;
if (!S_ISDIR (sb.st_mode)) {
errno = ENOTDIR;
goto done;
}
if ((sb.st_mode & S_IRWXU) != S_IRWXU) {
errno = EPERM;
goto done;
}
if (attr_set_flags (attrs, "persist-filesystem",