├── .gitignore ├── LICENSE ├── Makefile ├── README ├── plugstack.conf ├── private-tmpdir.c └── slurm-spank-private-tmpdir.spec /.gitignore: -------------------------------------------------------------------------------- 1 | *.so 2 | *.o 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU LESSER GENERAL PUBLIC LICENSE 2 | Version 2.1, February 1999 3 | 4 | Copyright (C) 1991, 1999 Free Software Foundation, Inc. 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | [This is the first released version of the Lesser GPL. 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This is useful for /tmp, /var/tmp and other 3 | node-local temporary directories. 4 | 5 | The implementation uses unshare(CLONE_NEWNS) to unshare the mount 6 | namespace and then bind mounts the private directories. 7 | 8 | If you have issues please let us know or fix it and send us a patch. 9 | 10 | Author: 11 | Magnus Jonsson 12 | 13 | Contributions from: 14 | Lars Viklund 15 | Ake Sandgren 16 | Pär Lindfors 17 | 18 | Configuration parameters 19 | ------------------------ 20 | 21 | The SPANK plugin use the following parameters. 22 | 23 | base: For each job the plugin will create a directory named 24 | $base.$SLURM_JOB_ID.$SLURM_RESTART_COUNT 25 | 26 | mount: Private mount point. This can be specified more than once. 27 | 28 | For each mount, a directory will be created in the base dir 29 | and then bind mounted on the specified mount point. 30 | 31 | Example 32 | ------- 33 | 34 | plugstack.conf: 35 | 36 | required private-tmpdir.so base=/tmp/slurm mount=/var/tmp mount=/tmp 37 | 38 | When a job with jobid 100 and restart count 0, the following 39 | directories will be created on compute nodes: 40 | 41 | /tmp/slurm.100.0 42 | /tmp/slurm.100.0/var_tmp 43 | /tmp/slurm.100.0/tmp 44 | 45 | In private namespaces the following bind mounts are done: 46 | 47 | /tmp/slurm.100.0/var_tmp on /var/tmp 48 | /tmp/slurm.100.0/tmp on /tmp 49 | 50 | Note: In this example it is important that mount=/tmp is specified 51 | last, since after /tmp/slurm.100.0/tmp is bind mounted on /tmp 52 | directories in /tmp/slurm.* can no longer be accessed. 53 | 54 | Cleanup 55 | ------- 56 | 57 | The plugin does not do any cleanup. 58 | 59 | See below for an example of how to remove temporary directories from 60 | Slurms Epilog script. 61 | 62 | Epilog example 63 | -------------- 64 | 65 | #!/bin/bash 66 | # 67 | # Slurm Epilog script that removes directories created by the 68 | # private-tmpdir SPANK plugin. 69 | # 70 | # TMPDIR_BASE needs to match the configured base= in plugstack.conf 71 | TMPDIR_BASE=/tmp/slurm 72 | PRIVATE_TMPDIR="${TMPDIR_BASE}.${SLURM_JOB_ID}.${SLURM_RESTART_COUNT:=0}" 73 | if [ -d "${PRIVATE_TMPDIR}" ]; then 74 | rm -rf "${PRIVATE_TMPDIR}" 75 | fi 76 | -------------------------------------------------------------------------------- /plugstack.conf: -------------------------------------------------------------------------------- 1 | # SLURM plugin stack config file for private-tmpdir 2 | # 3 | # Required configuration parameters: 4 | # 5 | # base: For each job the plugin will create a directory named 6 | # $base.$SLURM_JOB_ID.$SLURM_RESTART_COUNT 7 | # 8 | # It is possible to specify multiple bases. This is typically 9 | # used to have bind mounts to multiple file systems. 10 | # 11 | # mount: Private mount point. This can be specified more than once. 12 | # 13 | # For each mount, a directory will be created in the latest 14 | # specified base dir and then bind mounted on the specified 15 | # mount point. 16 | # 17 | # If a mount parameter is a parent of the base parameter it 18 | # have to be specified last. Also only one such mount will 19 | # work. 20 | # 21 | # Example configuration: 22 | #------------------------------------------------------------------------------- 23 | # required private-tmpdir.so base=/tmp/slurm mount=/var/tmp mount=/tmp 24 | #------------------------------------------------------------------------------- 25 | # 26 | # Example configuration with multiple base parameters: 27 | #------------------------------------------------------------------------------- 28 | # required private-tmpdir.so base=/dev/shm/slurm mount=/dev/shm base=/tmp/slurm mount=/var/tmp mount=/tmp 29 | #------------------------------------------------------------------------------- 30 | -------------------------------------------------------------------------------- /private-tmpdir.c: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | Spank plugin private-tmpdir 4 | Copyright (C) 2014 Magnus Jonsson 5 | 6 | This library is free software; you can redistribute it and/or 7 | modify it under the terms of the GNU Lesser General Public 8 | License as published by the Free Software Foundation; either 9 | version 2.1 of the License, or (at your option) any later version. 10 | 11 | This library is distributed in the hope that it will be useful, 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 | Lesser General Public License for more details. 15 | 16 | You should have received a copy of the GNU Lesser General Public 17 | License along with this library; if not, write to the Free Software 18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 | 20 | Additional contributions from: 21 | Lars Viklund 22 | Ake Sandgren 23 | Pär Lindfors 24 | 25 | */ 26 | 27 | /* Needs to be defined before first invocation of features.h so enable 28 | * it early. */ 29 | #define _GNU_SOURCE /* See feature_test_macros(7) */ 30 | 31 | #include 32 | #include 33 | #include 34 | #include 35 | #include 36 | #include 37 | #include 38 | #include 39 | #include 40 | #include 41 | #include 42 | 43 | SPANK_PLUGIN(private-tmpdir, 1); 44 | 45 | // Default 46 | #define MAX_BIND_DIRS 16 47 | 48 | // Globals 49 | static int init_opts = 0; 50 | static int binded = 0; 51 | static char pbase[PATH_MAX + 1] = ""; 52 | static uid_t uid = (uid_t) - 1; 53 | static gid_t gid = (gid_t) - 1; 54 | static uint32_t jobid; 55 | static uint32_t restartcount; 56 | 57 | static char *bases[MAX_BIND_DIRS]; 58 | static char *base_paths[MAX_BIND_DIRS]; 59 | static char *bind_dirs[MAX_BIND_DIRS]; 60 | static char *bind_paths[MAX_BIND_DIRS]; 61 | static int bind_count = 0; 62 | static int base_count = 0; 63 | // Globals 64 | 65 | static int _tmpdir_bind(spank_t sp, int ac, char **av); 66 | static int _tmpdir_cleanup(spank_t sp, int ac, char **av); 67 | static int _tmpdir_init(spank_t sp, int ac, char **av); 68 | static int _tmpdir_init_opts(spank_t sp, int ac, char **av); 69 | 70 | /* 71 | * Called from both srun and slurmd. 72 | */ 73 | int slurm_spank_init(spank_t sp, int ac, char **av) 74 | { 75 | if (spank_context () != S_CTX_REMOTE) return (0); 76 | return _tmpdir_init_opts(sp, ac, av); 77 | } 78 | 79 | int slurm_spank_exit(spank_t sp, int ac, char **av) 80 | { 81 | if (spank_context () != S_CTX_REMOTE) return (0); 82 | return _tmpdir_cleanup(sp, ac, av); 83 | } 84 | 85 | int slurm_spank_job_prolog(spank_t sp, int ac, char **av) 86 | { 87 | int rc, i; 88 | if (_tmpdir_init(sp, ac, av)) 89 | return -1; 90 | for (i = 0; i < base_count; i++) { 91 | struct stat sbuf; 92 | int rc = stat(base_paths[i],&sbuf); 93 | if(rc == 0) { 94 | if(sbuf.st_uid != uid) { 95 | slurm_error("private-tmpdir: stat(\"%s\"): %m exists with wrong owner", 96 | base_paths[i]); 97 | return -1; 98 | } 99 | if(sbuf.st_gid != gid) { 100 | slurm_error("private-tmpdir: stat(\"%s\"): %m exists with wrong group", 101 | base_paths[i]); 102 | return -1; 103 | } 104 | // No need to create, already exists 105 | continue; 106 | } 107 | if (mkdir(base_paths[i], 0700)) { 108 | slurm_error("private-tmpdir: mkdir(\"%s\",0700): %m", 109 | base_paths[i]); 110 | return -1; 111 | } 112 | if (chown(base_paths[i], uid, gid)) { 113 | slurm_error("private-tmpdir: chown(%s,%u,%u): %m", 114 | base_paths[i], uid, gid); 115 | return -1; 116 | } 117 | } 118 | for (i = 0; i < bind_count; i++) { 119 | struct stat sbuf; 120 | int rc = stat(bind_paths[i],&sbuf); 121 | if(rc == 0) { 122 | if(sbuf.st_uid != uid) { 123 | slurm_error("private-tmpdir: stat(\"%s\"): %m exists with wrong owner", 124 | bind_paths[i]); 125 | return -1; 126 | } 127 | if(sbuf.st_gid != gid) { 128 | slurm_error("private-tmpdir: stat(\"%s\"): %m exists with wrong group", 129 | bind_paths[i]); 130 | return -1; 131 | } 132 | // No need to create, already exists 133 | continue; 134 | } 135 | if (mkdir(bind_paths[i], 0700)) { 136 | slurm_error("private-tmpdir: mkdir(\"%s\",0700): %m", 137 | bind_paths[i]); 138 | return -1; 139 | } 140 | if (chown(bind_paths[i], uid, gid)) { 141 | slurm_error("private-tmpdir: chown(%s,%u,%u): %m", 142 | bind_paths[i], uid, gid); 143 | return -1; 144 | } 145 | } 146 | rc = _tmpdir_bind(sp, ac, av); 147 | _tmpdir_cleanup(sp, ac, av); 148 | return rc; 149 | } 150 | 151 | int slurm_spank_init_post_opt(spank_t sp, int ac, char **av) 152 | { 153 | if (spank_context () != S_CTX_REMOTE) 154 | return (0); 155 | return _tmpdir_bind(sp, ac, av); 156 | } 157 | 158 | static int _tmpdir_bind(spank_t sp, int ac, char **av) 159 | { 160 | int i; 161 | 162 | // only on cluster nodes 163 | if (!spank_remote(sp)) 164 | return 0; 165 | // We have done this already 166 | if (binded) 167 | return 0; 168 | // Don't do this anymore 169 | binded = 1; 170 | 171 | // Init dirs 172 | if (_tmpdir_init(sp, ac, av)) 173 | return -1; 174 | 175 | // Make / share (propagate) mounts (same as mount --make-rshared /) 176 | if (mount("", "/", "dontcare", MS_REC | MS_SHARED, "")) { 177 | slurm_error 178 | ("private-tmpdir: failed to 'mount --make-rshared /' for job: %u, %m", 179 | jobid); 180 | return -1; 181 | } 182 | // Create our own namespace 183 | if (unshare(CLONE_NEWNS)) { 184 | slurm_error 185 | ("private-tmpdir: failed to unshare mounts for job: %u, %m", 186 | jobid); 187 | return -1; 188 | } 189 | // Make / slave (same as mount --make-rslave /) 190 | if (mount("", "/", "dontcare", MS_REC | MS_SLAVE, "")) { 191 | slurm_error 192 | ("private-tmpdir: failed to 'mount --make-rslave /' for job: %u, %m", 193 | jobid); 194 | return -1; 195 | } 196 | // mount --bind bind_paths[i] bind_dirs[i] 197 | for (i = 0; i < bind_count; i++) { 198 | slurm_debug("private-tmpdir: mounting: %s %s", bind_paths[i], 199 | bind_dirs[i]); 200 | if (mount(bind_paths[i], bind_dirs[i], "none", MS_BIND, NULL)) { 201 | slurm_error 202 | ("private-tmpdir: failed to mount %s for job: %u, %m", 203 | bind_dirs[i], jobid); 204 | return -1; 205 | } 206 | } 207 | return 0; 208 | } 209 | 210 | static int _tmpdir_cleanup(spank_t sp, int ac, char **av) 211 | { 212 | char *prev_base = NULL; 213 | int i; 214 | 215 | for (i = 0; i < base_count; i++) { 216 | if (bases[i] != prev_base) { 217 | prev_base = bases[i]; 218 | if(bases[i]) { 219 | free(bases[i]); 220 | } 221 | } 222 | if(base_paths[i]) { 223 | free(base_paths[i]); 224 | } 225 | } 226 | for (i = 0; i < bind_count; i++) { 227 | if(bind_dirs[i]) { 228 | free(bind_dirs[i]); 229 | } 230 | if(bind_paths[i]) { 231 | free(bind_paths[i]); 232 | } 233 | } 234 | return 0; 235 | } 236 | 237 | static int _tmpdir_init(spank_t sp, int ac, char **av) 238 | { 239 | int n; 240 | 241 | // if length(pbase) > 0, we have already bin here.. 242 | if (pbase[0] != '\0') 243 | return 0; 244 | 245 | if (_tmpdir_init_opts(sp, ac, av)) 246 | return 0; 247 | 248 | // Get JobID 249 | if (spank_get_item(sp, S_JOB_ID, &jobid) != ESPANK_SUCCESS) { 250 | slurm_error("private-tmpdir: Failed to get jobid from SLURM"); 251 | return -1; 252 | } 253 | // Get UID 254 | if (spank_get_item(sp, S_JOB_UID, &uid) != ESPANK_SUCCESS) { 255 | slurm_error("private-tmpdir: Unable to get job's user id"); 256 | return -1; 257 | } 258 | // Get GID 259 | if (spank_get_item(sp, S_JOB_GID, &gid) != ESPANK_SUCCESS) { 260 | slurm_debug("private-tmpdir: Unable to get job's group id"); 261 | gid = 0; 262 | } 263 | // Get Restart count 264 | if (spank_get_item(sp, S_SLURM_RESTART_COUNT, &restartcount) != 265 | ESPANK_SUCCESS) { 266 | slurm_debug 267 | ("private-tmpdir: Unable to get job's restart count"); 268 | restartcount = 0; 269 | } 270 | // Init base paths 271 | for (int i = 0, j = 0; i < bind_count; i++) { 272 | if (i == 0 || bases[i] != bases[i - 1]) { 273 | n = snprintf(pbase, sizeof(pbase), "%s.%u.%u", bases[i], 274 | jobid, restartcount); 275 | if (n < 0 || n > sizeof(pbase) - 1) { 276 | slurm_error 277 | ("private-tmpdir: \"%s.%u.%u\" too large. Aborting", 278 | bases[i], jobid, restartcount); 279 | return -1; 280 | } 281 | base_paths[j] = strndup(pbase, sizeof(pbase)); 282 | j++; 283 | } 284 | // Init bind dirs path(s) 285 | bind_paths[i] = 286 | malloc(strlen(pbase) + strlen(bind_dirs[i]) + 2); 287 | if (!bind_paths[i]) { 288 | slurm_error 289 | ("private-tmpdir: Can't malloc bind_paths[i]: %m"); 290 | return -1; 291 | } 292 | char *tmp = strdup(bind_dirs[i]); 293 | if (!tmp) { 294 | slurm_error 295 | ("private-tmpdir: Can't strdup bind_dirs[i]: %m"); 296 | return -1; 297 | } 298 | for (int j = 1; j < strlen(tmp); j++) { 299 | if (tmp[j] == '/') { 300 | tmp[j] = '_'; 301 | } 302 | } 303 | n = snprintf(bind_paths[i], PATH_MAX, "%s%s", pbase, tmp); 304 | if (n < 0 || n > PATH_MAX - 1) { 305 | slurm_error 306 | ("private-tmpdir: \"%s/%s\" too large. Aborting", 307 | pbase, tmp); 308 | free(tmp); 309 | return -1; 310 | } 311 | free(tmp); 312 | } 313 | return 0; 314 | } 315 | 316 | static int _tmpdir_init_opts(spank_t sp, int ac, char **av) 317 | { 318 | char *base = ""; 319 | int i; 320 | 321 | if (init_opts) 322 | return 0; 323 | init_opts = 1; 324 | 325 | // for each argument in plugstack.conf 326 | for (i = 0; i < ac; i++) { 327 | if (strncmp("base=", av[i], 5) == 0) { 328 | const char *optarg = av[i] + 5; 329 | if (!strlen(optarg)) { 330 | slurm_error 331 | ("private-tmpdir: no argument given to base= option"); 332 | return -1; 333 | } 334 | base = strdup(optarg); 335 | if (!base) { 336 | slurm_error("private-tmpdir: can't malloc :-("); 337 | return -1; 338 | } 339 | base_count++; 340 | continue; 341 | } 342 | if (strncmp("mount=", av[i], 6) == 0) { 343 | // mount= before base=, use default value 344 | if (base_count == 0) { 345 | base = strdup("/tmp/slurm"); 346 | if (!base) { 347 | slurm_error 348 | ("private-tmpdir: can't malloc :-("); 349 | return -1; 350 | } 351 | base_count++; 352 | } 353 | const char *optarg = av[i] + 6; 354 | if (bind_count == MAX_BIND_DIRS) { 355 | slurm_error 356 | ("private-tmpdir: Reached MAX_BIND_DIRS (%d)", 357 | MAX_BIND_DIRS); 358 | return -1; 359 | } 360 | if (!strlen(optarg)) { 361 | slurm_error 362 | ("private-tmpdir: no argument given to mount= option"); 363 | return -1; 364 | } 365 | if (optarg[0] != '/') { 366 | slurm_error 367 | ("private-tmpdir: mount= option must start with a '/': (%s)", 368 | optarg); 369 | return -1; 370 | } 371 | bases[bind_count] = base; 372 | bind_dirs[bind_count] = strdup(optarg); 373 | if (!bind_dirs[bind_count]) { 374 | slurm_error("private-tmpdir: can't malloc :-("); 375 | return -1; 376 | } 377 | bind_count++; 378 | continue; 379 | } 380 | slurm_error("private-tmpdir: Invalid option \"%s\"", av[i]); 381 | return -1; 382 | } 383 | return 0; 384 | } 385 | -------------------------------------------------------------------------------- /slurm-spank-private-tmpdir.spec: -------------------------------------------------------------------------------- 1 | %define _use_internal_dependency_generator 0 2 | %define __find_requires %{_builddir}/find-requires 3 | Summary: Slurm SPANK plugin for job private tmpdir 4 | Name: slurm-spank-private-tmpdir 5 | Version: 0.0.2 6 | Release: 1 7 | License: GPL 8 | Group: System Environment/Base 9 | Source0: %{name}-%{version}.tar.gz 10 | BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root 11 | BuildRequires: slurm-devel 12 | Requires: slurm 13 | 14 | %description 15 | Slurm SPANK plugin that uses file system namespaces to create private 16 | temporary directories for each job. 17 | 18 | %prep 19 | %setup -q 20 | # Dummy file used to get a RPM dependency on libslurm.so 21 | echo 'int main(){}' > %{_builddir}/libslurm_dummy.c 22 | cat < %{_builddir}/find-requires 23 | #!/bin/sh 24 | # Add dummy to list of files sent to the regular find-requires 25 | { echo %{_builddir}/libslurm_dummy; cat; } | \ 26 | /usr/lib/rpm/redhat/find-requires 27 | EOF 28 | chmod +x %{_builddir}/find-requires 29 | 30 | %build 31 | make all 32 | gcc -lslurm -o %{_builddir}/libslurm_dummy %{_builddir}/libslurm_dummy.c 33 | 34 | %install 35 | install -d %{buildroot}%{_libdir}/slurm 36 | install -d %{buildroot}%{_sysconfdir}/slurm/plugstack.conf.d 37 | install -m 755 private-tmpdir.so %{buildroot}%{_libdir}/slurm/ 38 | install -m 644 plugstack.conf \ 39 | %{buildroot}%{_sysconfdir}/slurm/plugstack.conf.d/private-tmpdir.conf 40 | 41 | %clean 42 | rm -rf %{buildroot} 43 | 44 | %files 45 | %doc README LICENSE 46 | %defattr(-,root,root,-) 47 | %{_libdir}/slurm/private-tmpdir.so 48 | %config %{_sysconfdir}/slurm/plugstack.conf.d/private-tmpdir.conf 49 | 50 | %changelog 51 | * Thu Feb 02 2017 Pär Lindfors - 0.0.2-1 52 | - Support multiple base parameters 53 | * Mon Feb 16 2015 Pär Lindfors - 0.0.1-1 54 | - Initial RPM packaging 55 | --------------------------------------------------------------------------------