diff --git a/tools/cib_shadow.c b/tools/cib_shadow.c index d0853ccce1..98ee731997 100644 --- a/tools/cib_shadow.c +++ b/tools/cib_shadow.c @@ -1,477 +1,472 @@ /* * Copyright (C) 2004 Andrew Beekhof * * 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. * * This software 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 GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include int exit_code = pcmk_ok; GMainLoop *mainloop = NULL; const char *host = NULL; void usage(const char *cmd, int exit_status); int command_options = cib_sync_call; const char *cib_action = NULL; cib_t *real_cib = NULL; static int force_flag = 0; static int batch_flag = 0; static char * get_shadow_prompt(const char *name) { return crm_strdup_printf("shadow[%.40s] # ", name); } static void shadow_setup(char *name, gboolean do_switch) { const char *prompt = getenv("PS1"); const char *shell = getenv("SHELL"); char *new_prompt = get_shadow_prompt(name); printf("Setting up shadow instance\n"); if (safe_str_eq(new_prompt, prompt)) { /* nothing to do */ goto done; } else if (batch_flag == FALSE && shell != NULL) { setenv("PS1", new_prompt, 1); setenv("CIB_shadow", name, 1); printf("Type Ctrl-D to exit the crm_shadow shell\n"); if (strstr(shell, "bash")) { execl(shell, shell, "--norc", "--noprofile", NULL); } else { execl(shell, shell, NULL); } } else if (do_switch) { printf("To switch to the named shadow instance, paste the following into your shell:\n"); } else { printf ("A new shadow instance was created. To begin using it paste the following into your shell:\n"); } printf(" CIB_shadow=%s ; export CIB_shadow\n", name); done: free(new_prompt); } static void shadow_teardown(char *name) { const char *prompt = getenv("PS1"); char *our_prompt = get_shadow_prompt(name); if (prompt != NULL && strstr(prompt, our_prompt)) { printf("Now type Ctrl-D to exit the crm_shadow shell\n"); } else { printf ("Please remember to unset the CIB_shadow variable by pasting the following into your shell:\n"); printf(" unset CIB_shadow\n"); } free(our_prompt); } /* *INDENT-OFF* */ static struct crm_option long_options[] = { /* Top-level Options */ {"help", 0, 0, '?', "\t\tThis text"}, {"version", 0, 0, '$', "\t\tVersion information" }, {"verbose", 0, 0, 'V', "\t\tIncrease debug output"}, {"-spacer-", 1, 0, '-', "\nQueries:"}, {"which", no_argument, NULL, 'w', "\t\tIndicate the active shadow copy"}, {"display", no_argument, NULL, 'p', "\t\tDisplay the contents of the active shadow copy"}, {"edit", no_argument, NULL, 'E', "\t\tEdit the contents of the active shadow copy with your favorite $EDITOR"}, {"diff", no_argument, NULL, 'd', "\t\tDisplay the changes in the active shadow copy\n"}, {"file", no_argument, NULL, 'F', "\t\tDisplay the location of the active shadow copy file\n"}, {"-spacer-", 1, 0, '-', "\nCommands:"}, {"create", required_argument, NULL, 'c', "\tCreate the named shadow copy of the active cluster configuration"}, {"create-empty", required_argument, NULL, 'e', "Create the named shadow copy with an empty cluster configuration. Optional: --validate-with"}, {"commit", required_argument, NULL, 'C', "\tUpload the contents of the named shadow copy to the cluster"}, {"delete", required_argument, NULL, 'D', "\tDelete the contents of the named shadow copy"}, {"reset", required_argument, NULL, 'r', "\tRecreate the named shadow copy from the active cluster configuration"}, {"switch", required_argument, NULL, 's', "\t(Advanced) Switch to the named shadow copy"}, {"-spacer-", 1, 0, '-', "\nAdditional Options:"}, {"force", no_argument, NULL, 'f', "\t\t(Advanced) Force the action to be performed"}, {"batch", no_argument, NULL, 'b', "\t\t(Advanced) Don't spawn a new shell" }, {"all", no_argument, NULL, 'a', "\t\t(Advanced) Upload the entire CIB, including status, with --commit" }, {"validate-with", required_argument, NULL, 'v', "(Advanced) Create an older configuration version" }, {"-spacer-", 1, 0, '-', "\nExamples:", pcmk_option_paragraph}, {"-spacer-", 1, 0, '-', "Create a blank shadow configuration:", pcmk_option_paragraph}, {"-spacer-", 1, 0, '-', " crm_shadow --create-empty myShadow", pcmk_option_example}, {"-spacer-", 1, 0, '-', "Create a shadow configuration from the running cluster:", pcmk_option_paragraph}, {"-spacer-", 1, 0, '-', " crm_shadow --create myShadow", pcmk_option_example}, {"-spacer-", 1, 0, '-', "Display the current shadow configuration:", pcmk_option_paragraph}, {"-spacer-", 1, 0, '-', " crm_shadow --display", pcmk_option_example}, {"-spacer-", 1, 0, '-', "Discard the current shadow configuration (named myShadow):", pcmk_option_paragraph}, {"-spacer-", 1, 0, '-', " crm_shadow --delete myShadow", pcmk_option_example}, {"-spacer-", 1, 0, '-', "Upload the current shadow configuration (named myShadow) to the running cluster:", pcmk_option_paragraph}, {"-spacer-", 1, 0, '-', " crm_shadow --commit myShadow", pcmk_option_example}, {0, 0, 0, 0} }; /* *INDENT-ON* */ int main(int argc, char **argv) { int rc = 0; int flag; int argerr = 0; static int command = '?'; const char *validation = NULL; char *shadow = NULL; char *shadow_file = NULL; gboolean full_upload = FALSE; gboolean dangerous_cmd = FALSE; struct stat buf; int option_index = 0; crm_log_cli_init("crm_shadow"); crm_set_options(NULL, "(query|command) [modifiers]", long_options, "Perform configuration changes in a sandbox before updating the live cluster." "\n\nSets up an environment in which configuration tools (cibadmin, crm_resource, etc) work" " offline instead of against a live cluster, allowing changes to be previewed and tested" " for side-effects.\n"); if (argc < 2) { crm_help('?', EX_USAGE); } while (1) { flag = crm_get_option(argc, argv, &option_index); if (flag == -1 || flag == 0) break; switch (flag) { case 'a': full_upload = TRUE; break; case 'd': case 'E': case 'p': case 'w': case 'F': command = flag; free(shadow); shadow = NULL; { const char *env = getenv("CIB_shadow"); if(env) { shadow = strdup(env); } else { fprintf(stderr, "No active shadow configuration defined\n"); crm_exit(ENOENT); } } break; case 'v': validation = optarg; break; case 'e': case 'c': case 's': case 'r': command = flag; free(shadow); shadow = strdup(optarg); break; case 'C': case 'D': command = flag; dangerous_cmd = TRUE; free(shadow); shadow = strdup(optarg); break; case 'V': command_options = command_options | cib_verbose; crm_bump_log_level(argc, argv); break; case '$': case '?': crm_help(flag, EX_OK); break; case 'f': command_options |= cib_quorum_override; force_flag = 1; break; case 'b': batch_flag = 1; break; default: printf("Argument code 0%o (%c)" " is not (?yet?) supported\n", flag, flag); ++argerr; break; } } if (optind < argc) { printf("non-option ARGV-elements: "); while (optind < argc) printf("%s ", argv[optind++]); printf("\n"); crm_help('?', EX_USAGE); } if (optind > argc) { ++argerr; } if (argerr) { crm_help('?', EX_USAGE); } if (command == 'w') { /* which shadow instance is active? */ const char *local = getenv("CIB_shadow"); if (local == NULL) { fprintf(stderr, "No shadow instance provided\n"); rc = -ENXIO; goto done; } fprintf(stdout, "%s\n", local); rc = 0; goto done; } if (shadow == NULL) { fprintf(stderr, "No shadow instance provided\n"); fflush(stderr); rc = -EINVAL; goto done; } else if (command != 's' && command != 'c') { const char *local = getenv("CIB_shadow"); if (local != NULL && safe_str_neq(local, shadow) && force_flag == FALSE) { fprintf(stderr, "The supplied shadow instance (%s) is not the same as the active one (%s).\n" " To prevent accidental destruction of the cluster," " the --force flag is required in order to proceed.\n", shadow, local); fflush(stderr); rc = EX_USAGE; goto done; } } if (dangerous_cmd && force_flag == FALSE) { fprintf(stderr, "The supplied command is considered dangerous." " To prevent accidental destruction of the cluster," " the --force flag is required in order to proceed.\n"); fflush(stderr); rc = EX_USAGE; goto done; } shadow_file = get_shadow_file(shadow); if (command == 'D') { /* delete the file */ - rc = stat(shadow_file, &buf); - if (rc == 0) { - rc = unlink(shadow_file); - if (rc != 0) { - fprintf(stderr, "Could not remove shadow instance '%s': %s\n", shadow, - strerror(errno)); - goto done; - } + rc = unlink(shadow_file); + if ((rc < 0) && (errno != ENOENT)) { + fprintf(stderr, "Could not remove shadow instance '%s': %s\n", + shadow, strerror(errno)); } - shadow_teardown(shadow); goto done; } else if (command == 'F') { printf("%s\n", shadow_file); rc = 0; goto done; } if (command == 'd' || command == 'r' || command == 'c' || command == 'C') { real_cib = cib_new_no_shadow(); rc = real_cib->cmds->signon(real_cib, crm_system_name, cib_command); if (rc != pcmk_ok) { fprintf(stderr, "Signon to CIB failed: %s\n", pcmk_strerror(rc)); goto done; } } rc = stat(shadow_file, &buf); if (command == 'e' || command == 'c') { if (rc == 0 && force_flag == FALSE) { fprintf(stderr, "A shadow instance '%s' already exists.\n" " To prevent accidental destruction of the cluster," " the --force flag is required in order to proceed.\n", shadow); rc = -ENOTUNIQ; goto done; } } else if (rc != 0) { fprintf(stderr, "Could not access shadow instance '%s': %s\n", shadow, strerror(errno)); rc = -ENXIO; goto done; } rc = pcmk_ok; if (command == 'c' || command == 'e' || command == 'r') { xmlNode *output = NULL; /* create a shadow instance based on the current cluster config */ if (command == 'c' || command == 'r') { rc = real_cib->cmds->query(real_cib, NULL, &output, command_options); if (rc != pcmk_ok) { fprintf(stderr, "Could not connect to the CIB: %s\n", pcmk_strerror(rc)); goto done; } } else { output = createEmptyCib(0); if(validation) { crm_xml_add(output, XML_ATTR_VALIDATION, validation); } printf("Created new %s configuration\n", crm_element_value(output, XML_ATTR_VALIDATION)); } rc = write_xml_file(output, shadow_file, FALSE); free_xml(output); if (rc < 0) { fprintf(stderr, "Could not %s the shadow instance '%s': %s\n", command == 'r' ? "reset" : "create", shadow, pcmk_strerror(rc)); goto done; } shadow_setup(shadow, FALSE); rc = pcmk_ok; } else if (command == 'E') { const char *err = NULL; char *editor = getenv("EDITOR"); if (editor == NULL) { fprintf(stderr, "No value for $EDITOR defined\n"); rc = -EINVAL; goto done; } execlp(editor, "--", shadow_file, NULL); err = strerror(errno); fprintf(stderr, "Could not invoke $EDITOR (%s %s): %s\n", editor, shadow_file, err); rc = -EINVAL; goto done; } else if (command == 's') { shadow_setup(shadow, TRUE); rc = 0; goto done; } else if (command == 'p') { /* display the current contents */ char *output_s = NULL; xmlNode *output = filename2xml(shadow_file); output_s = dump_xml_formatted(output); printf("%s", output_s); free(output_s); free_xml(output); } else if (command == 'd') { /* diff against cluster */ xmlNode *diff = NULL; xmlNode *old_config = NULL; xmlNode *new_config = filename2xml(shadow_file); rc = real_cib->cmds->query(real_cib, NULL, &old_config, command_options); if (rc != pcmk_ok) { fprintf(stderr, "Could not query the CIB: %s\n", pcmk_strerror(rc)); goto done; } xml_track_changes(new_config, NULL, new_config, FALSE); xml_calculate_changes(old_config, new_config); diff = xml_create_patchset(0, old_config, new_config, NULL, FALSE); xml_log_changes(LOG_INFO, __FUNCTION__, new_config); xml_accept_changes(new_config); if (diff != NULL) { xml_log_patchset(0, " ", diff); rc = 1; goto done; } rc = 0; goto done; } else if (command == 'C') { /* commit to the cluster */ xmlNode *input = filename2xml(shadow_file); if (full_upload) { rc = real_cib->cmds->replace(real_cib, NULL, input, command_options); } else { xmlNode *config = first_named_child(input, XML_CIB_TAG_CONFIGURATION); rc = real_cib->cmds->replace(real_cib, XML_CIB_TAG_CONFIGURATION, config, command_options); } if (rc != pcmk_ok) { fprintf(stderr, "Could not commit shadow instance '%s' to the CIB: %s\n", shadow, pcmk_strerror(rc)); goto done; } shadow_teardown(shadow); free_xml(input); } done: free(shadow_file); free(shadow); return crm_exit(rc); }