先日まで問題なく通ってたのになぜかfailedになってしまったので、さくっと対応。

Host key verification failed.
fatal: Could not read from remote repository.

原因

wercker.yml

    - add-to-known_hosts:
      hostname: bitbucket.org
      fingerprint: 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40

上記部分の処理の際に

Searching for keys that match fingerprint 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40
Skipped adding a key to known_hosts, it did not match the fingerprint (35:ee:d7:b8:ef:d7:79:e2:c6:43:9e:ab:40:6f:50:74)
Added a key to /etc/ssh/ssh_known_hosts

今まではこんなログが吐かれてましたが

Searching for keys that match fingerprint 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40
Skipped adding a key to known_hosts, it did not match the fingerprint (SHA256:RezPkAnH1sowiJM0NQXH90IohWdzHc3fAisEp7L3O3o)
Skipped adding a key to known_hosts, it did not match the fingerprint (SHA256:zzXQOXSRBEiUtuE8AikJYKwbHaxvSc0ojez9YXaGp1A)

こんな感じに変わってたので、下記対応でMD5からSHA256に変更して解決

wercker.yml

    - add-to-known_hosts:
      hostname: bitbucket.org
      fingerprint: zzXQOXSRBEiUtuE8AikJYKwbHaxvSc0ojez9YXaGp1A
      type: rsa <--- ついでだし追加しておいた

Searching for keys that match fingerprint zzXQOXSRBEiUtuE8AikJYKwbHaxvSc0ojez9YXaGp1A
Added a key to /etc/ssh/ssh_known_hosts