Jen*_*ler 5 crash-reports amazon-ec2 amazon-web-services amazon-linux-2
昨天我们与 10 台配置相同的服务器失去了联系，经过一番调查后得出的结论是安全更新后重新启动失败了。
到目前为止，我们还无法让任何服务器重新上线，但很幸运能够重新安装实例而不会丢失数据。
我将粘贴下面的控制台日志，任何人都可以帮助我确定根本原因，也许可以给我一些建议，告诉我是否有更好的方法来配置服务器以使恢复更容易（例如通过“按 Enter 继续”提示）。 ，它似乎挂在）。
完整的日志对于SO来说太大了，所以我把它放在pastebin上并粘贴了下面的编辑版本。我已经删除了使输出着色的转义序列并删除了一些双新行，但除此之外它是完整的。
[ 0.000000] Linux version 4.14.200-155.322.amzn2.x86_64 (mockbuild@ip-10-0-1-230) (gcc version 7.3.1 20180712 (Red Hat 7.3.1-10) (GCC)) #1 SMP Thu Oct 15 20:11:12 UTC 2020
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.14.200-155.322.amzn2.x86_64 root=UUID=a1e1011e-e38f-408e-878b-fed395b47ad6 ro console=tty0 console=ttyS0,115200n8 net.ifnames=0 biosdevname=0 nvme_core.io_timeout=4294967295 rd.emergency=poweroff rd.shell=0 LANG=en_US.UTF-8
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.7 present.
[ 0.000000] DMI: Amazon EC2 t3.micro/, BIOS 1.0 10/16/2017
[ 0.000000] Hypervisor detected: KVM
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] e820: last_pfn = 0x3e3fa max_arch_pfn = 0x400000000
[ 0.000000] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.000000] Scanning 1 areas for low memory corruption
[ 0.000000] Using GB pages for direct mapping
[ 0.000000] RAMDISK: [mem 0x3433e000-0x36196fff]
[ 0.000000] ACPI: Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 0x00000000000F8F80 000014 (v00 AMAZON)
[ 0.000000] ACPI: RSDT 0x000000003E3FE360 00003C (v01 AMAZON AMZNRSDT 00000001 AMZN 00000001)
[ 0.000000] ACPI: FACS 0x000000003E3FFF40 000040
[ 0.000000] ACPI: SSDT 0x000000003E3FF6C0 00087A (v01 AMAZON AMZNSSDT 00000001 AMZN 00000001)
[ 0.000000] smpboot: Allowing 2 CPUs, 0 hotplug CPUs
[ 0.000000] e820: [mem 0x40000000-0xdfffffff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on KVM
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.14.200-155.322.amzn2.x86_64 root=UUID=a1e1011e-e38f-408e-878b-fed395b47ad6 ro console=tty0 console=ttyS0,115200n8 net.ifnames=0 biosdevname=0 nvme_core.io_timeout=4294967295 rd.emergency=poweroff rd.shell=0 LANG=en_US.UTF-8
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] Memory: 943540K/1019488K available (10252K kernel code, 1958K rwdata, 2780K rodata, 2088K init, 4240K bss, 75948K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[ 0.000000] Kernel/User page tables isolation: enabled
[ 0.000000] ftrace: allocating 26683 entries in 105 pages
[ 0.004000] Hierarchical RCU implementation.
[ 0.004000] RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=2.
[ 0.004000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 0.004000] NR_IRQS: 524544, nr_irqs: 440, preallocated irqs: 16
[ 0.004000] Console: colour VGA+ 80x25
[ 0.004000] console [tty0] enabled
[ 0.004000] console [ttyS0] enabled
[ 0.004005] tsc: Detected 2500.000 MHz processor
[ 0.007582] Calibrating delay loop (skipped) preset value.. 5000.00 BogoMIPS (lpj=10000000)
[ 0.008002] pid_max: default: 32768 minimum: 301
[ 0.012006] ACPI: Core revision 20170728
[ 0.016560] ACPI: 2 ACPI AML tables successfully acquired and loaded
[ 0.020015] Security Framework initialized
[ 0.024002] SELinux: Initializing.
[ 0.028159] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.032082] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.036012] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.040006] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.044325] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 0.048003] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 0, 1GB 4
[ 0.052003] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 0.056003] Spectre V2 : Mitigation: Full generic retpoline
[ 0.060002] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
[ 0.064002] Speculative Store Bypass: Vulnerable
[ 0.067720] TAA: Vulnerable: Clear CPU buffers attempted, no microcode
[ 0.068002] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
[ 0.072086] Freeing SMP alternatives memory: 24K
[ 0.076807] smpboot: Max logical packages: 1
[ 0.080264] x2apic enabled
[ 0.084003] Switched APIC routing to physical x2apic.
[ 0.088000] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[ 0.088000] smpboot: CPU0: Intel(R) Xeon(R) Platinum 8175M CPU @ 2.50GHz (family: 0x6, model: 0x55, stepping: 0x4)
[ 0.088074] Performance Events: unsupported p6 CPU model 85 no PMU driver, software events only.
[ 0.092046] Hierarchical SRCU implementation.
[ 0.095857] NMI watchdog: Perf event create on CPU 0 failed with -2
[ 0.096002] NMI watchdog: Perf NMI watchdog permanently disabled
[ 0.100049] smp: Bringing up secondary CPUs ...
[ 0.103696] x86: Booting SMP configuration:
[ 0.104003] .... node #0, CPUs: #1
[ 0.004000] kvm-clock: cpu 1, msr 0:3e357041, secondary cpu clock
[ 0.106853] KVM setup async PF for cpu 1
[ 0.107214] kvm-stealtime: cpu 1, msr 3e1161c0
[ 0.112307] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details.
[ 0.116006] TAA CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html for more details.
[ 0.120007] smp: Brought up 1 node, 2 CPUs
[ 0.123417] smpboot: Total of 2 processors activated (10000.00 BogoMIPS)
[ 0.124320] devtmpfs: initialized
[ 0.126970] x86/mm: Memory block size: 128MB
[ 0.128137] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.132008] futex hash table entries: 512 (order: 3, 32768 bytes)
[ 0.136156] NET: Registered protocol family 16
[ 0.139769] cpuidle: using governor ladder
[ 0.140013] cpuidle: using governor menu
[ 0.143281] ACPI: bus type PCI registered
[ 0.144000] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.148144] PCI: Using configuration type 1 for base access
[ 0.156770] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
[ 0.160017] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[ 0.164044] ACPI: Added _OSI(Module Device)
[ 0.168007] ACPI: Added _OSI(Processor Device)
[ 0.172007] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.176004] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.180007] ACPI: Interpreter enabled
[ 0.184011] ACPI: (supports S0 S4 S5)
[ 0.187094] ACPI: Using IOAPIC for interrupt routing
[ 0.188018] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.300750] ACPI: Enabled 16 GPEs in block 00 to 0F
[ 0.308023] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 0.312007] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[ 0.316010] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
[ 0.320007] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[ 0.328324] acpiphp: Slot [3] registered
[ 0.420040] acpiphp: Slot [31] registered
[ 0.424003] PCI host bridge to bus 0000:00
[ 0.536451] pci 0000:00:03.0: vgaarb: setting as boot VGA device
[ 0.540000] pci 0000:00:03.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
[ 0.548009] pci 0000:00:03.0: vgaarb: bridge control possible
[ 0.551996] vgaarb: loaded
[ 0.556090] EDAC MC: Ver: 3.0.0
[ 0.559140] PCI: Using ACPI for IRQ routing
[ 0.560280] NetLabel: Initializing
[ 0.563268] NetLabel: domain hash size = 128
[ 0.568019] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 0.571902] NetLabel: unlabeled traffic allowed by default
[ 0.576145] clocksource: Switched to clocksource kvm-clock
[ 0.586755] VFS: Disk quotas dquot_6.6.0
[ 0.590090] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.594562] pnp: PnP ACPI init
[ 0.597855] pnp: PnP ACPI: found 5 devices
[ 0.608231] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[ 0.614881] NET: Registered protocol family 2
[ 0.618324] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.622749] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[ 0.626965] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.631170] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 0.635163] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 0.639358] NET: Registered protocol family 1
[ 0.642779] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 0.646797] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[ 0.651113] pci 0000:00:03.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[ 0.657825] Unpacking initramfs...
[ 0.734208] Freeing initrd memory: 31076K
[ 0.737636] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x240939f1bb2, max_idle_ns: 440795263295 ns
[ 0.745181] Scanning for low memory corruption every 60 seconds
[ 0.750602] audit: initializing netlink subsys (disabled)
[ 0.754606] audit: type=2000 audit(1603879247.564:1): state=initialized audit_enabled=0 res=1
[ 0.754917] Initialise system trusted keyrings
[ 0.764927] Key type blacklist registered
[ 0.768266] workingset: timestamp_bits=36 max_order=18 bucket_order=0
[ 0.773861] zbud: loaded
[ 0.905903] Key type asymmetric registered
[ 0.909292] Asymmetric key parser 'x509' registered
[ 0.912915] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[ 0.918972] io scheduler noop registered (default)
[ 0.922543] io scheduler cfq registered
[ 0.925904] crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64
[ 0.964594] crc32c_combine: 8373 self tests passed
[ 0.968628] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 1.000785] 00:04: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 1.007649] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
[ 1.014310] i8042: Warning: Keylock active
[ 1.018572] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 1.022414] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 1.026284] rtc_cmos 00:00: RTC can wake from S4
[ 1.030475] rtc_cmos 00:00: rtc core: registered rtc_cmos as rtc0
[ 1.034755] rtc_cmos 00:00: alarms up to one day, 114 bytes nvram
[ 1.038955] hidraw: raw HID events driver (C) Jiri Kosina
[ 1.042936] NET: Registered protocol family 17
[ 1.046622] mce: Using 32 MCE banks
[ 1.049627] sched_clock: Marking stable (1049607566, 0)->(1755024155, -705416589)
[ 1.056014] registered taskstats version 1
[ 1.059279] Loading compiled-in X.509 certificates
[ 1.064832] Loaded X.509 cert 'Build time autogenerated kernel key: 121ffea65ca15230f4a21fe7e5b65abaabaa433c'
[ 1.072013] zswap: loaded using pool lzo/zbud
[ 1.075526] ima: No TPM chip found, activating TPM-bypass! (rc=-19)
[ 1.079746] ima: Allocated hash algorithm: sha1
[ 1.083589] rtc_cmos 00:00: setting system clock to 2020-10-28 09:59:31 UTC (1603879171)
[ 1.091820] Freeing unused kernel memory: 2088K
[ 1.116102] Write protecting the kernel read-only data: 16384k
[ 1.120697] Freeing unused kernel memory: 2016K
[ 1.126528] Freeing unused kernel memory: 1316K
[ 1.160972] systemd[1]: Inserted module 'autofs4'
[ 1.176133] NET: Registered protocol family 10
[ 1.181508] Segment Routing with IPv6
[ 1.184828] systemd[1]: Inserted module 'ipv6'
[ 1.189116] random: systemd: uninitialized urandom read (16 bytes read)
[ 1.193763] random: systemd: uninitialized urandom read (16 bytes read)
[ 1.198171] random: systemd: uninitialized urandom read (16 bytes read)
[ 1.205354] systemd[1]: systemd 219 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 -SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
[ 1.217384] systemd[1]: Detected virtualization kvm.
[ 1.221077] systemd[1]: Detected architecture x86-64.
[ 1.224774] systemd[1]: Running in initial RAM disk.
Welcome to Amazon Linux 2 dracut-033-535.amzn2.1.3 (Initramfs)
[ 1.230712] systemd[1]: No hostname configured.
[ 1.234213] systemd[1]: Set hostname to <localhost>.
[ 1.237934] systemd[1]: Initializing machine ID from KVM UUID.
[ OK ] Reached target Swap.
[ 1.265844] systemd[1]: Reached target Swap.
[ 1.269312] systemd[1]: Starting Swap.
[ OK ] Created slice Root Slice.
[ 1.274036] systemd[1]: Created slice Root Slice.
[ OK ] Listening on Journal Socket.
[ OK ] Reached target Timers.
[ OK ] Reached target Local Encrypted Volumes.
[ OK ] Reached target Local File Systems.
[ OK ] Listening on udev Control Socket.
[ OK ] Created slice System Slice.
Starting Setup Virtual Console...
Starting Journal Service...
Starting Create list of required st... nodes for the current kernel...
Starting Apply Kernel Variables...
[ OK ] Reached target Slices.
[ OK ] Listening on udev Kernel Socket.
[ OK ] Reached target Sockets.
Starting dracut cmdline hook...
[ OK ] Started Setup Virtual Console.
[ OK ] Started Create list of required sta...ce nodes for the current kernel.
[ OK ] Started Apply Kernel Variables.
Starting Create Static Device Nodes in /dev...
[ OK ] Started Create Static Device Nodes in /dev.
[ OK ] Started Journal Service.
[ OK ] Started dracut cmdline hook.
Starting dracut pre-udev hook...
[ 1.390579] device-mapper: uevent: version 1.0.3
[ 1.394255] device-mapper: ioctl: 4.37.0-ioctl (2017-09-20) initialised: dm-devel@redhat.com
[ OK ] Started dracut pre-udev hook.
Starting udev Kernel Device Manager...
[ OK ] Started udev Kernel Device Manager.
Starting dracut pre-trigger hook...
[ OK ] Started dracut pre-trigger hook.
Starting udev Coldplug all Devices...
[ OK ] Started udev Coldplug all Devices.
Starting Show Plymouth Boot Screen...
[ OK ] Reached target System Initialization.
Starting dracut initqueue hook...
[ 1.534629] nvme nvme0: pci function 0000:00:04.0
[ OK ] Started Show Plymouth Boot Screen.
[ OK ] Reached target Paths.
[ OK ] Reached target Basic System.
[ 1.543815] ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
[ 1.546543] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0
[ 1.556607] nvme nvme1: pci function 0000:00:1f.0
[ 1.557854] ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 10
[ 1.576394] AVX2 version of gcm_enc/dec engaged.
[ 1.580503] AES CTR mode by8 optimization enabled
[ 1.601321] alg: No test for pcbc(aes) (pcbc-aes-aesni)
[ 1.776495] nvme0n1: p1 p128
[ 1.908576] random: fast init done
[ OK ] Found device /dev/disk/by-uuid/a1e1011e-e38f-408e-878b-fed395b47ad6.
Starting File System Check on /dev/...e-e38f-408e-878b-fed395b47ad6...
[ OK ] Started File System Check on /dev/d...11e-e38f-408e-878b-fed395b47ad6.
[ OK ] Started dracut initqueue hook.
[ OK ] Reached target Remote File Systems (Pre).
[ OK ] Reached target Remote File Systems.
Starting dracut pre-mount hook...
[ OK ] Started dracut pre-mount hook.
Mounting /sysroot...
[ 2.235770] SGI XFS with ACLs, security attributes, no debug enabled
[ 2.242333] XFS (nvme0n1p1): Mounting V5 Filesystem
[ 4.142597] XFS (nvme0n1p1): Ending clean mount
[ OK ] Mounted /sysroot.
[ OK ] Reached target Initrd Root File System.
Starting Reload Configuration from the Real Root...
[ OK ] Started Reload Configuration from the Real Root.
[ OK ] Reached target Initrd File Systems.
[ OK ] Reached target Initrd Default Target.
Starting dracut pre-pivot and cleanup hook...
[ OK ] Started dracut pre-pivot and cleanup hook.
Starting Cleaning Up and Shutting Down Daemons...
[ OK ] Stopped Cleaning Up and Shutting Down Daemons.
[ OK ] Stopped target Timers.
[ OK ] Stopped dracut pre-pivot and cleanup hook.
Stopping dracut pre-pivot and cleanup hook...
[ OK ] Stopped target Remote File Systems.
[ OK ] Stopped target Remote File Systems (Pre).
[ OK ] Stopped target Initrd Default Target.
Starting Plymouth switch root service...
[ OK ] Stopped dracut pre-mount hook.
Stopping dracut pre-mount hook...
[ OK ] Stopped dracut initqueue hook.
Stopping dracut initqueue hook...
[ OK ] Stopped target Basic System.
[ OK ] Stopped target Sockets.
[ OK ] Stopped target System Initialization.
[ OK ] Stopped target Swap.
[ OK ] Stopped target Local File Systems.
[ OK ] Stopped Apply Kernel Variables.
Stopping Apply Kernel Variables...
[ OK ] Stopped target Local Encrypted Volumes.
[ OK ] Stopped udev Coldplug all Devices.
Stopping udev Coldplug all Devices...
[ OK ] Stopped dracut pre-trigger hook.
Stopping dracut pre-trigger hook...
Stopping udev Kernel Device Manager...
[ OK ] Stopped target Slices.
[ OK ] Stopped target Paths.
[ OK ] Stopped udev Kernel Device Manager.
[ OK ] Stopped Create Static Device Nodes in /dev.
Stopping Create Static Device Nodes in /dev...
[ OK ] Stopped Create list of required sta...ce nodes for the current kernel.
Stopping Create list of required st... nodes for the current kernel...
[ OK ] Stopped dracut pre-udev hook.
Stopping dracut pre-udev hook...
[ OK ] Stopped dracut cmdline hook.
Stopping dracut cmdline hook...
[ OK ] Closed udev Kernel Socket.
[ OK ] Closed udev Control Socket.
Starting Cleanup udevd DB...
[ OK ] Started Cleanup udevd DB.
[ OK ] Reached target Switch Root.
[ 4.553875] systemd-journald[667]: Received SIGTERM from PID 1 (systemd).
[ OK ] Started Plymouth switch root service.
Starting Switch Root...
[ 4.885212] systemd: 30 output lines suppressed due to ratelimiting
[ 5.925390] SELinux: Disabled at runtime.
[ 5.980115] audit: type=1404 audit(1603879176.396:2): selinux=0 auid=4294967295 ses=4294967295
[ 6.083250] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 6.106470] systemd[1]: Inserted module 'ip_tables'
Welcome to Amazon Linux 2
[ OK ] Stopped Switch Root.
[ OK ] Stopped Journal Service.
Starting Journal Service...
[ OK ] Reached target Swap.
[ OK ] Listening on Delayed Shutdown Socket.
Mounting Huge Pages File System...
[ OK ] Stopped target Switch Root.
[ OK ] Stopped target Initrd Root File System.
[ OK ] Created slice system-getty.slice.
[ OK ] Listening on udev Control Socket.
[ OK ] Listening on Device-mapper event daemon FIFOs.
[ OK ] Created slice User and Session Slice.
Starting Create list of required st... nodes for the current kernel...
[ OK ] Listening on LVM2 poll daemon socket.
[ OK ] Stopped target Initrd File Systems.
[ OK ] Listening on udev Kernel Socket.
Mounting Debug File System...
[ OK ] Reached target Slices.
[ OK ] Listening on LVM2 metadata daemon socket.
Mounting POSIX Message Queue File System...
[ OK ] Created slice system-selinux\x2dpol...grate\x2dlocal\x2dchanges.slice.
Starting Monitoring of LVM2 mirrors... dmeventd or progress polling...
[ OK ] Created slice system-serial\x2dgetty.slice.
Starting Read and set NIS domainname from /etc/sysconfig/network...
[ OK ] Listening on /dev/initctl Compatibility Named Pipe.
[ OK ] Set up automount Arbitrary Exe
小智 3
我想我已经将范围缩小到了ec2-utils包。我们遇到了同样的问题，与设备安装不正确有关，我们最初认为与 ENA 或 NVMe 驱动程序有关。一旦我们运行 yum update，问题就解决了。
如果你降级ec2-utils包会导致ec2-utils-1.2-2.amzn2问题返回。这似乎只影响基于硝基的实例。要修复此问题，您可以临时作为 t2 或其他旧实例类型启动并更新软件包。
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