Ich hatte diese voll funktionsfähige Amazon Linux 2-Instanz, die ich als Mailserver konfiguriert hatte. Im Sommer habe ich sie abgeschaltet. Aber mehr nicht. Wenn ich sie jetzt zu starten versuche, besteht sie nur die Hälfte der Prüfungen, die Instanzstatusprüfung schlägt fehl. Die Instanz war nicht erreichbar. Ich habe versucht, die IP-Adresse erneut zuzuweisen, ob es sich vielleicht um ein Netzwerkproblem handelte, aber keine Änderung. Beim Versuch, im Systemprotokoll nach Unstimmigkeiten zu suchen, finde ich einen Kernel-Panic. Genauer gesagt:
[ 2.330642] Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/admin-guide/init.rst for guidance.
[ 2.341751] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.14.128-112.105.amzn2.x86_64 #1
[ 2.348702] Hardware name: Amazon EC2 t3.micro/, BIOS 1.0 10/16/2017
[ 2.353256] Call Trace:
[ 2.356063] dump_stack+0x5c/0x82
[ 2.359252] ? rest_init+0x10/0xb0
[ 2.362449] panic+0xe4/0x252
[ 2.365444] ? do_execveat_common.isra.31+0x87/0x820
[ 2.369391] ? rest_init+0xb0/0xb0
[ 2.372587] kernel_init+0xeb/0xfc
[ 2.375852] ret_from_fork+0x35/0x40
[ 2.379959] Kernel Offset: disabled
[ 2.383237] ---[ end Kernel panic..]
Ich bin ratlos. Seit das System funktionstüchtig ist, wurden keine Änderungen am Volume oder Kernel vorgenommen. Was könnte dieses Problem verursacht haben?
Ich erhalte außerdem vor dem Ende des Protokolls (nach Kernel Panic) zwei weitere Arten von Warnungen:
[ 2.398371] WARNING: CPU: 1 PID: 1 at kernel/sched/core.c:1198 set_task_cpu+0x177/0x180
[ 2.405144] Modules linked in:
[ 2.408252] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.14.128-112.105.amzn2.x86_64 #1
[ 2.414987] Hardware name: Amazon EC2 t3.micro/, BIOS 1.0 10/16/2017
[ 2.419494] task: ffff88803deb4000 task.stack: ffffc90000194000
[ 2.423834] RIP: 0010:set_task_cpu+0x177/0x180
[ 2.427527] RSP: 0000:ffff88803e103e30 EFLAGS: 00010006
[ 2.431555] RAX: 0000000000000200 RBX: ffff88803df18000 RCX: 0000000000000090
[ 2.436436] RDX: ffffffffffffffd8 RSI: 0000000000000000 RDI: ffff88803df18000
[ 2.441357] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000003
[ 2.446228] R10: 0000000000000010 R11: 0000000000000000 R12: ffff88803df18b34
[ 2.451314] R13: 0000000000000000 R14: 0000000000000246 R15: 0000000000021380
[ 2.456536] FS: 0000000000000000(0000) GS:ffff88803e100000(0000) knlGS:0000000000000000
[ 2.463460] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.467777] CR2: 0000000000000000 CR3: 000000000200a001 CR4: 00000000007606e0
[ 2.472646] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2.477707] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 2.482526] PKRU: 00000000
[ 2.485418] Call Trace:
[ 2.488215] <IRQ>
[ 2.490820] try_to_wake_up+0x154/0x490
[ 2.494284] ? __queue_work+0x11c/0x410
[ 2.497707] ? call_timer_fn+0x130/0x130
[ 2.501135] call_timer_fn+0x30/0x130
[ 2.504433] run_timer_softirq+0x3f0/0x450
[ 2.507943] ? timerqueue_add+0x52/0x80
[ 2.622453] ? enqueue_hrtimer+0x37/0x80
[ 2.625931] __do_softirq+0xe3/0x2c7
[ 2.629236] irq_exit+0xbd/0xd0
[ 2.632357] smp_apic_timer_interrupt+0x78/0x130
[ 2.636131] apic_timer_interrupt+0x7d/0x90
[ 2.639758] </IRQ>
[ 2.642441] RIP: 0010:panic+0x201/0x252
[ 2.645950] RSP: 0000:ffffc90000197ec8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
[ 2.652663] RAX: 000000000000009b RBX: ffffffff81607900 RCX: ffffffff82065548
[ 2.657640] RDX: 0000000000000000 RSI: 0000000000000092 RDI: 0000000000000046
[ 2.662559] RBP: ffffc90000197f40 R08: 0000000000000168 R09: 000000000000000f
[ 2.667455] R10: ffffffff821ddbe0 R11: ffffffff826e872d R12: 0000000000000000
[ 2.672391] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 2.677708] ? rest_init+0x10/0xb0
[ 2.681017] ? panic+0x1fa/0x252
[ 2.684341] ? do_execveat_common.isra.31+0x87/0x820
[ 2.688306] ? rest_init+0xb0/0xb0
[ 2.691632] kernel_init+0xeb/0xfc
[ 2.694988] ret_from_fork+0x35/0x40
[ 2.698394] Code: 0e ff ff ff 80 8b 6c 08 00 00 04 e9 2a ff ff ff 0f 0b e9 ce fe ff ff f7 43 5c fd ff ff ff 0f 84 d8 fe ff ff 0f 0b e9 d1 fe ff ff <0f> 0b e9 db fe ff ff 66 90 0f 1f 44 00 00 41 55 41 54 49 89 f5
[ 2.711861] ---[ end trace 7b2141584b80ec24 ]---
[ 2.715622] sched: Unexpected reschedule of offline CPU#0!
[ 2.723573] WARNING: CPU: 1 PID: 1 at arch/x86/kernel/smp.c:128 native_smp_send_reschedule+0x37/0x40
[ 2.730938] Modules linked in:
[ 2.734042] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 4.14.128-112.105.amzn2.x86_64 #1
[ 2.741424] Hardware name: Amazon EC2 t3.micro/, BIOS 1.0 10/16/2017
[ 2.745941] task: ffff88803deb4000 task.stack: ffffc90000194000
[ 2.750354] RIP: 0010:native_smp_send_reschedule+0x37/0x40
[ 2.754563] RSP: 0000:ffff88803e103e18 EFLAGS: 00010086
[ 2.758654] RAX: 000000000000002e RBX: ffff88803e021380 RCX: ffffffff82065548
[ 2.763553] RDX: 0000000000000000 RSI: 0000000000000096 RDI: 0000000000000046
[ 2.768488] RBP: ffff88803e021380 R08: 0000000000000199 R09: 000000000000000f
[ 2.773431] R10: ffff88803e103d40 R11: ffffffff826e872d R12: ffff88803df18000
[ 2.778717] R13: ffff88803e103e68 R14: 0000000000000246 R15: 0000000000021380
[ 2.783660] FS: 0000000000000000(0000) GS:ffff88803e100000(0000) knlGS:0000000000000000
[ 2.790587] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.794889] CR2: 0000000000000000 CR3: 000000000200a001 CR4: 00000000007606e0
[ 2.799878] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2.804779] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 2.809674] PKRU: 00000000
[ 2.812641] Call Trace:
[ 2.815456] <IRQ>
[ 2.818130] check_preempt_curr+0x75/0x80
[ 2.821640] ttwu_do_wakeup+0x19/0x140
[ 2.825031] try_to_wake_up+0x1d1/0x490
[ 2.828570] ? __queue_work+0x11c/0x410
[ 2.832008] ? call_timer_fn+0x130/0x130
[ 2.835543] call_timer_fn+0x30/0x130
[ 2.838958] run_timer_softirq+0x3f0/0x450
[ 2.842498] ? timerqueue_add+0x52/0x80
[ 2.845953] ? enqueue_hrtimer+0x37/0x80
[ 2.849532] __do_softirq+0xe3/0x2c7
[ 2.852846] irq_exit+0xbd/0xd0
[ 2.856006] smp_apic_timer_interrupt+0x78/0x130
[ 2.859839] apic_timer_interrupt+0x7d/0x90
[ 2.863436] </IRQ>
[ 2.866089] RIP: 0010:panic+0x201/0x252
[ 2.869540] RSP: 0000:ffffc90000197ec8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
[ 2.876169] RAX: 000000000000009b RBX: ffffffff81607900 RCX: ffffffff82065548
[ 2.881295] RDX: 0000000000000000 RSI: 0000000000000092 RDI: 0000000000000046
[ 2.886293] RBP: ffffc90000197f40 R08: 0000000000000168 R09: 000000000000000f
[ 2.891396] R10: ffffffff821ddbe0 R11: ffffffff826e872d R12: 0000000000000000
[ 2.896413] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 2.901459] ? rest_init+0x10/0xb0
[ 2.904800] ? panic+0x1fa/0x252
[ 2.908095] ? do_execveat_common.isra.31+0x87/0x820
[ 2.912120] ? rest_init+0xb0/0xb0
[ 2.915520] kernel_init+0xeb/0xfc
[ 2.918961] ret_from_fork+0x35/0x40
[ 2.922434] Code: f5 18 01 73 18 48 8b 05 f8 14 e1 00 be fd 00 00 00 48 8b 80 a0 00 00 00 e9 e7 49 9b 00 89 fe 48 c7 c7 c8 ad dc 81 e8 74 73 09 00 <0f> 0b c3 66 0f 1f 44 00 00 0f 1f 44 00 00 48 83 ec 20 65 48 8b
[ 2.936170] ---[ end trace 7b2141584b80ec25 ]---