确保有足够的磁盘空间进行升级
使用新版 Junos OS 演化版升级设备所需的可用磁盘空间量可能因版本而异。检查要安装的软件版本以确定可用磁盘空间要求，然后为升级清除足够的磁盘空间。
如果 /soft、 /var 或 /data 目录的容量为 90% 或更高，则设备没有足够的存储空间来安装软件包。如果设备上的存储空间量不足以安装 Junos OS 演化版，您可能会收到类似于以下消息的警告，指出文件系统的可用磁盘空间不足：
WARNING: The /soft filesystem is low on free disk space.
WARNING: This package requires 1075136k free, but there is only 666502k available.
当设备上的系统文件存储空间已满时，重新启动设备并不能解决问题。在文件存储空间已满后，在设备上的典型作期间会显示以下错误消息： user@host> configure /soft: write failed, filesystem is full
- 要确定设备上的可用磁盘空间量，请发出
show system storage命令。命令输出显示有关设备文件系统中可用磁盘空间量的统计信息。例如：
user@host> show system storage fpc0: -------------------------------------------------------------------------- Filesystem Size Used Avail Capacity Mounted on /dev/root 30M 30M 0 100% /run/initramfs /dev/ram1p2 4.9G 586M 4.0G 13% /soft /dev/ram1p5 93M 19M 68M 22% /data /dev/ram1p7 2.7G 66M 2.4G 3% /var /dev/loop0 379M 2.3M 353M 1% /data/var/external devtmpfs 16G 0 16G 0% /dev [...output truncated...] fpc1: -------------------------------------------------------------------------- Filesystem Size Used Avail Capacity Mounted on /dev/root 30M 30M 0 100% /run/initramfs /dev/ram1p2 4.9G 586M 4.0G 13% /soft /dev/ram1p5 93M 19M 68M 22% /data /dev/ram1p7 2.7G 42M 2.5G 2% /var /dev/loop0 379M 2.3M 353M 1% /data/var/external devtmpfs 16G 0 16G 0% /dev [...output truncated...] re0: -------------------------------------------------------------------------- Filesystem Size Used Avail Capacity Mounted on /dev/root 34M 34M 0 100% /run/initramfs /dev/sda2 32G 10G 21G 34% /soft /dev/sda5 3.0G 179M 2.6G 7% /data /dev/sda7 145G 4.5G 134G 4% /var /dev/loop0 15G 38M 14G 1% /data/var/external devtmpfs 32G 0 32G 0% /dev /tmp 32G 0 32G 0% /run/initramfs/uswitch/tmp /dev/loop1 517M 517M 0 100% /run/initramfs/uswitch/data/hashes/8e6065a478c593473cd390245274128f1a5885e8 /dev/loop2 29M 29M 0 100% /run/initramfs/uswitch/data/hashes/244e2161887b001792709ec078f864c966baca88 /dev/loop3 36M 36M 0 100% /run/initramfs/uswitch/data/hashes/4cad203feb9c1bd4a903f03503a6777509e4031d /dev/loop4 10M 10M 0 100% /run/initramfs/uswitch/data/hashes/5f9454b8d26e33715373f621d16c9c752e3ff57b /dev/loop5 46M 46M 0 100% /run/initramfs/uswitch/data/hashes/182901abd18cefe6f63397bcbb6f2a8238d38a9b /dev/loop6 9.8M 9.8M 0 100% /run/initramfs/uswitch/data/hashes/c08bb2c69ae7ff2446bdcb32011a03a4a53c5585 /dev/loop7 58M 58M 0 100% /run/initramfs/uswitch/data/hashes/c92e70dc394c01bf5a2a9d06ffcc25ba673286d1 /dev/loop8 34M 34M 0 100% /run/initramfs/uswitch/data/hashes/90fdfeec1bab47c19641d636598a4205bbb7949d /dev/loop9 8.2M 8.2M 0 100% /run/initramfs/uswitch/data/hashes/3874cf9fea904b2d5d3f6920671864bdc05130a2 /dev/loop10 34M 34M 0 100% /run/initramfs/uswitch/data/hashes/35afa8ff63aded42bd23444b672dcd33b922898c /dev/loop11 7.0M 7.0M 0 100% /run/initramfs/uswitch/data/hashes/15684de48b2a621a98afaf9619026dd81cdf74bd /dev/loop12 4.5M 4.5M 0 100% /run/initramfs/uswitch/data/hashes/2d75968c5d882c86b38015fc93fe9e148e226407 /dev/loop13 148M 148M 0 100% /run/initramfs/uswitch/data/hashes/ccb0c8af3d4b26bddf9ccc047aa7e76d34e31387 uswitchd 7.0M 7.0M 0 100% /run/initramfs/uswitch/data/junos-evo-install-ptx-x86-64-21.2I20210315015050-EVO__cd-builder/uswitch unionfs 3.0G 186M 2.6G 7% / /dev/sda1 196M 19M 178M 10% /boot /dev/sda6 984M 1.5M 916M 1% /data/config /tmp 32G 68K 32G 1% /tmp tmpfs 32G 28M 32G 1% /run tmpfs 32G 123M 32G 1% /dev/shm tmpfs 32G 0 32G 0% /sys/fs/cgroup tmpfs 6.3G 0 6.3G 0% /run/user/0 re1: -------------------------------------------------------------------------- Filesystem Size Used Avail Capacity Mounted on /dev/root 34M 34M 0 100% /run/initramfs /dev/sda2 32G 10G 21G 34% /soft /dev/sda5 3.0G 321M 2.5G 12% /data /dev/sda7 145G 3.0G 135G 3% /var /dev/loop0 15G 38M 14G 1% /data/var/external devtmpfs 32G 0 32G 0% /dev [...output truncated...]
- 如果设备上的可用磁盘空间量不足以安装 Junos OS 演化版，则可以通过删除系统文件或不必要的软件映像来清理设备上的文件存储。您可以使用或
request system software delete作模式命令，或同时使用request system storage cleanup两者，具体取决于需要清理空间的位置。- 在主路由引擎上发出
request system storage cleanup作模式命令，以删除系统中所有路由引擎的 /var 目录中的系统文件，通常是 system-log 和跟踪文件。将显示要删除的文件列表：
user@host> request system storage cleanup List of files to delete: Size Date Name 11B Oct 28 23:40 /var/jail/tmp/alarmd.ts 92.4K Jan 11 17:12 /var/log/chassisd.0.gz 92.4K Jan 11 06:06 /var/log/chassisd.1.gz 92.5K Jan 10 19:00 /var/log/chassisd.2.gz 92.5K Jan 10 07:53 /var/log/chassisd.3.gz 92.2K Jan 10 15:00 /var/log/hostlogs/auth.log.1.gz 92.2K Jan 1 18:45 /var/log/hostlogs/auth.log.2.gz 92.1K Jan 4 17:30 /var/log/hostlogs/auth.log.3.gz 92.2K Jan 1 18:45 /var/log/hostlogs/auth.log.4.gz 79.0K Jan 12 01:59 /var/log/hostlogs/daemon.log.1.gz 78.8K Jan 11 23:15 /var/log/hostlogs/daemon.log.2.gz 78.7K Jan 11 20:30 /var/log/hostlogs/daemon.log.3.gz 79.1K Jan 11 17:44 /var/log/hostlogs/daemon.log.4.gz 59.1K Jan 11 21:59 /var/log/hostlogs/debug.1.gz 59.2K Jan 11 17:44 /var/log/hostlogs/debug.2.gz 59.2K Jan 11 13:29 /var/log/hostlogs/debug.3.gz 59.3K Jan 11 09:14 /var/log/hostlogs/debug.4.gz 186.6K Oct 20 16:31 /var/log/hostlogs/kern.log.1.gz 238.3K Jan 11 23:15 /var/log/hostlogs/lcmd.log.1.gz 238.4K Jan 11 17:30 /var/log/hostlogs/lcmd.log.2.gz 238.6K Jan 11 11:45 /var/log/hostlogs/lcmd.log.3.gz 238.5K Jan 11 06:00 /var/log/hostlogs/lcmd.log.4.gz 372.5K Jan 11 17:00 /var/log/hostlogs/syslog.1.gz 372.5K Jan 11 04:45 /var/log/hostlogs/syslog.2.gz 371.9K Jan 10 16:30 /var/log/hostlogs/syslog.3.gz 372.7K Jan 10 04:15 /var/log/hostlogs/syslog.4.gz 10.1K Jan 12 02:03 /var/log/messages.0.gz 55.1K Jan 6 21:25 /var/log/messages.1.gz 81.5K Dec 1 21:30 /var/log/messages.2.gz Delete these files ? [yes,no] (no)输入删除文件的选项 yes 。
- 在清理系统中所有路由引擎的 /soft 和 /data 目录中不必要的软件映像之前，必须先使用
show system software list作模式命令找出设备上存在哪些映像。------------------------------- node: fpc0 ------------------------------- Active boot device is primary: /dev/ram1 List of installed version(s) : '-' running version '>' next boot version after upgrade/downgrade '<' rollback boot version - junos-evo-install-ptx-x86-64-20.4-202103151929.0-EVO - [2021-03-17 12:18:07] ------------------------------- node: re0 ------------------------------- Active boot device is primary: /dev/sda List of installed version(s) : '-' running version '>' next boot version after upgrade/downgrade '<' rollback boot version < junos-evo-install-ptx-x86-64-20.4-202103121629.0-EVO - [2021-03-17 11:22:40] - junos-evo-install-ptx-x86-64-20.4-202103151929.0-EVO - [2021-03-17 10:50:39] junos-evo-install-ptx-x86-64-20.4-202103131143.0-EVO - [2021-03-16 16:12:38] junos-evo-install-ptx-x86-64-20.4-202103141559.0-EVO - [2021-03-15 17:26:42] ------------------------------- node: re1 ------------------------------- Active boot device is primary: /dev/sda List of installed version(s) : '-' running version '>' next boot version after upgrade/downgrade '<' rollback boot version < junos-evo-install-ptx-x86-64-20.4-202103121629.0-EVO - [2021-03-17 11:25:03] - junos-evo-install-ptx-x86-64-20.4-202103151929.0-EVO - [2021-03-17 10:50:39] junos-evo-install-ptx-x86-64-20.4-202103131143.0-EVO - [2021-03-16 16:14:55] junos-evo-install-ptx-x86-64-20.4-202103141559.0-EVO - [2021-03-15 17:57:05]您可以一次删除一个软件映像，也可以删除除当前映像和回滚映像之外的所有软件映像。这些命令会删除系统中所有路由引擎上的映像。
- 要一次删除一个软件映像，请为需要删除的每个映像发出
request system software delete image-name作模式命令。如果删除此映像，则无法降级到此特定版本的软件。您无法删除当前运行的软件版本。force使用选项删除回滚软件映像。 - 从 Junos OS 演化版 20.4R2 开始，要删除除当前映像和回滚映像之外的所有软件映像，请发出
request system software delete archived作模式命令。当路由引擎上有下一启动软件映像时，此命令将失败;已安装新的软件映像，但设备尚未重新启动以完成安装过程。user@host-re0> request system software delete archived ALERT: This command will delete all archived SW versions except current and rollback. Do you want to proceed? [yes,no] (no) yes Software delete in progress... re0: Executing Software delete... re0: Cannot delete junos-evo-install-ptx-x86-64-20.4-202103141559.0-EVO - It is the current version re0: Rollback or scratch install re0: Removing version junos-evo-install-ptx-x86-64-20.4-202103150459.0-EVO... re0: Removing version junos-evo-install-ptx-x86-64-20.4-202103111254.0-EVO... re1: Removing version junos-evo-install-ptx-x86-64-20.4-202103150459.0-EVO... re1: Removing version junos-evo-install-ptx-x86-64-20.4-202103111254.0-EVO... Image deletion succeeded.
- 要一次删除一个软件映像，请为需要删除的每个映像发出
- 在主路由引擎上发出