journal: replace implicit flushing of journal by explicit one
The old automatism that the flushing of the journal from /run to /var was triggered by the appearance of /var/log/journal is broken if that directory is mounted from another host and hence always available to be useful as mount point. To avoid probelsm with this, introduce a new unit that is explicitly orderer after all mounte files systems and triggers the flushing.
This commit is contained in:
Lennart Poettering
parent
14a65d65a0
commit
b8156be03f
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@ -2331,7 +2331,8 @@ dist_systemunit_DATA += \
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units/systemd-journald.socket
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nodist_systemunit_DATA += \
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units/systemd-journald.service
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units/systemd-journald.service \
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units/systemd-journal-flush.service
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dist_pkgsysconf_DATA += \
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src/journal/journald.conf
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@ -2357,6 +2358,7 @@ EXTRA_DIST += \
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src/journal/libsystemd-journal.pc.in \
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src/journal/libsystemd-journal.sym \
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units/systemd-journald.service.in \
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units/systemd-journal-flush.service.in \
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src/journal/journald-gperf.gperf
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CLEANFILES += \
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@ -69,8 +69,6 @@
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#define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC)
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#define RECHECK_VAR_AVAILABLE_USEC (30*USEC_PER_SEC)
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#define N_IOVEC_META_FIELDS 17
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#define ENTRY_SIZE_MAX (1024*1024*32)
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@ -121,8 +119,6 @@ static const char* const storage_table[] = {
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DEFINE_STRING_TABLE_LOOKUP(storage, Storage);
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DEFINE_CONFIG_PARSE_ENUM(config_parse_storage, storage, Storage, "Failed to parse storage setting");
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static int server_flush_to_var(Server *s);
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static uint64_t available_space(Server *s) {
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char ids[33], *p;
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const char *f;
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@ -630,8 +626,6 @@ static void dispatch_message_real(
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assert(n <= m);
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server_flush_to_var(s);
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retry:
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f = find_journal(s, realuid == 0 ? 0 : loginuid);
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if (f) {
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@ -1963,8 +1957,8 @@ static int system_journal_open(Server *s) {
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sd_id128_to_string(machine, ids);
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if (!s->system_journal &&
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(s->storage == STORAGE_PERSISTENT ||
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s->storage == STORAGE_AUTO)) {
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(s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) &&
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access("/run/systemd/journal/flushed", F_OK) >= 0) {
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/* If in auto mode: first try to create the machine
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* path, but not the prefix.
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@ -1972,7 +1966,7 @@ static int system_journal_open(Server *s) {
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* If in persistent mode: create /var/log/journal and
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* the machine path */
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if (s->storage & STORAGE_PERSISTENT)
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if (s->storage == STORAGE_PERSISTENT)
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(void) mkdir("/var/log/journal/", 0755);
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fn = strappend("/var/log/journal/", ids);
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@ -1982,7 +1976,6 @@ static int system_journal_open(Server *s) {
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(void) mkdir(fn, 0755);
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free(fn);
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/* The create the system journal file */
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fn = join("/var/log/journal/", ids, "/system.journal", NULL);
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if (!fn)
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return -ENOMEM;
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@ -2034,7 +2027,7 @@ static int system_journal_open(Server *s) {
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/* OK, we really need the runtime journal, so create
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* it if necessary. */
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(void) mkdir_parents_label(fn, 0755);
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(void) mkdir_parents(fn, 0755);
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r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
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free(fn);
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@ -2062,7 +2055,6 @@ static int server_flush_to_var(Server *s) {
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int r;
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sd_id128_t machine;
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sd_journal *j;
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usec_t ts;
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assert(s);
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@ -2073,12 +2065,6 @@ static int server_flush_to_var(Server *s) {
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if (!s->runtime_journal)
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return 0;
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ts = now(CLOCK_MONOTONIC);
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if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts)
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return 0;
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s->var_available_timestamp = ts;
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system_journal_open(s);
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if (!s->system_journal)
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@ -2215,6 +2201,7 @@ static int process_event(Server *s, struct epoll_event *ev) {
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}
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if (sfsi.ssi_signo == SIGUSR1) {
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touch("/run/systemd/journal/flushed");
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server_flush_to_var(s);
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return 1;
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}
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@ -1,3 +1,4 @@
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/systemd-journal-flush.service
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/systemd-hibernate.service
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/systemd-suspend.service
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/console-getty.service
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@ -0,0 +1,18 @@
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# This file is part of systemd.
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#
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# systemd is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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[Unit]
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Description=Trigger Flushing of Journal to Persistent Storage
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Documentation=man:systemd-journald.service(8) man:journald.conf(5)
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DefaultDependencies=no
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Requires=systemd-journald.service
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After=systemd-journald.service local-fs.target remote-fs.target
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Before=systemd-user-sessions.service
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[Service]
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ExecStart=@rootbindir@/systemctl kill --kill-who=main --signal=SIGUSR1 systemd-journald.service
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Type=oneshot
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@ -9,6 +9,7 @@
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Description=Journal Service
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Documentation=man:systemd-journald.service(8) man:journald.conf(5)
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DefaultDependencies=no
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Wants=systemd-journal-flush.service
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Requires=systemd-journald.socket
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After=systemd-journald.socket syslog.socket
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