(encryption) tikv-ctl dump encryption metadata panic without data-dir in config.toml

[mayjiang0203]

Bug Report

What version of TiKV are you using?

master

What operating system and CPU are you using?

Steps to reproduce

What did you expect?

What did happened?

Without data-dir in config, add --data-dir option in command line, dump-file panic as following:

sh-5.1# /tikv-ctl --config=/etc/tikv/tikv.toml --ca-path /var/lib/tikv-tls/ca.crt --cert-path /var/lib/tikv-tls/tls.crt --key-path /var/lib/tikv-tls/tls.key --data-dir=/var/lib/tikv/data/ --host=127.0.0.1:20160 encryption-meta dump-file
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Io(Os { code: 2, kind: NotFound, message: "No such file or directory" })', cmd/tikv-ctl/src/main.rs:211:88
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

After adding data-dir in config.toml as following, command succeeded.

sh-5.1# cat /tikv.toml
log-file = "/var/lib/tikv/log/tikv.log"
log-level = "info"

[security]
  ca-path = "/var/lib/tikv-tls/ca.crt"
  cert-path = "/var/lib/tikv-tls/tls.crt"
  key-path = "/var/lib/tikv-tls/tls.key"
  redact-info-log = true
  [security.encryption]
    data-encryption-method = "aes128-ctr"
    data-key-rotation-period = "1h"
    [security.encryption.master-key]
      endpoint = "https://kms.us-west-2.amazonaws.com"
      key-id = "b2e2affa-f462-4758-8abc-2e1eed17c907"
      region = "us-west-2"
      type = "kms"

[server]
  [server.labels]
    zone = "us-west-2a"

[storage]
  data-dir = "/var/lib/tikv/data"
  reserve-space = "0MB"
sh-5.1# /tikv-ctl --config=/tikv.toml --ca-path /var/lib/tikv-tls/ca.crt --cert-path /var/lib/tikv-tls/tls.crt --key-path /var/lib/tikv-tls/tls.key --host=127.0.0.1:20160 encryption-meta dump-file
/var/lib/tikv/data/raft-engine/0000000000000001.rewrite: key_id: 1459426208351074235 iv: 1C08ED0A9EB96397A714301B3CFD2DC2 method: Aes128Ctr
/var/lib/tikv/data/db/OPTIONS-000013: key_id: 1459426208351074235 iv: AD6C990A5C9DC99E9C654D8146AFF488 method: Aes128Ctr
/var/lib/tikv/data/db/OPTIONS-000011: key_id: 1459426208351074235 iv: 144B28145D499859FD277FDA9D72AED2 method: Aes128Ctr
/var/lib/tikv/data/db/MANIFEST-000004: key_id: 1459426208351074235 iv: C5D015987266ACB21B7BCD6A1B2CB8F5 method: Aes128Ctr
/var/lib/tikv/data/db/000005.log: key_id: 1459426208351074235 iv: 0169F5E82CABBA4EEE72974708FF498A method: Aes128Ctr
/var/lib/tikv/data/raft-engine/0000000000000001.raftlog: key_id: 1459426208351074235 iv: 424F67A96780A7FC21A535556E9B4B4B method: Aes128Ctr
/var/lib/tikv/data/db/IDENTITY: key_id: 1459426208351074235 iv: 46520C04ADC926AD0B18ACCFD1DD7DA1 method: Aes128Ctr

[mayjiang0203]

/severity moderate
/assign @LykxSassinator