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julyclyde这个 是我在追加 字符后 k8s 内的 tail 的 系统调用
```code
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=0, ...}) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=0, ...}) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=0, ...}) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=0, ...}) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=7, ...}) = 0
read(3, "", 8192) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=7, ...}) = 0
read(3, "", 8192) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=7, ...}) = 0
read(3, "", 8192) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=7, ...}) = 0
read(3, "", 8192) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=7, ...}) = 0
read(3, "", 8192) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
```
这个 是我在追加 字符后 本地 docker 的 tail 的 系统调用
```code
fstat(3, {st_mode=S_IFREG|0755, st_size=0, ...}) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=0, ...}) = 0
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=7, ...}) = 0
read(3, "123456\n", 8192) = 7
fstat(1, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3fb0879000
read(3, "", 8192) = 0
fstat(3, {st_mode=S_IFREG|0755, st_size=7, ...}) = 0
write(1, "123456\n", 7) = 7
nanosleep({tv_sec=1, tv_nsec=0}, NULL) = 0
```
st_size 都 0->7 了 但是 本地进行了文件读写 k8s 没有。。。
我觉的基本可以确认是 tail 软件本身的问题了