表題の通りでハマってしまった。
各ソフトウェアのバージョン
$ sudo rabbitmqctl status
...
{rabbit,"RabbitMQ","3.6.6"}
... $ cat /usr/lib/erlang/releases/18/OTP_VERSION 18.3
rabbitmq.config
{versions, ['tlsv1.2', 'tlsv1.1', tlsv1]} 接続確認
openssl s_client で接続確認してみる。
tls1.2
$ openssl s_client -connect 127.0.0.1:5671 -tls1_2 < /dev/null
これ問題なかった。
tls1 tls1.1
どっちもなぜか同じように以下のようなエラーになる。
$ openssl s_client -connect 127.0.0.1:5671 -tls1_1 < /dev/null
CONNECTED(00000003)
139728874526360:error:1409442F:SSL routines:ssl3_read_bytes:tlsv1 alert insufficient security:s3_pkt.c:1472:SSL alert number 71
139728874526360:error:1409E0E5:SSL routines:ssl3_write_bytes:ssl handshake failure:s3_pkt.c:656:
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 7 bytes and written 0 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.1
Cipher : 0000
Session-ID:
Session-ID-ctx:
Master-Key:
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1483074781
Timeout : 7200 (sec)
Verify return code: 0 (ok)
--- 解決方法
結局これは Erlang の ssl ライブラリの問題らしく、基本的には Erlang のバージョンをあげる必要があるっぽい。しかしRabbitMQ 3.6.1 / Erlang 18.3 TLS insufficient security failures からリンクがある通り以下のようにするとうまくいった。
{versions, ['tlsv1.2', 'tlsv1.1', tlsv1]},
{ciphers, ["ECDHE-ECDSA-AES256-GCM-SHA384","ECDHE-RSA-AES256-GCM-SHA384",
"ECDHE-ECDSA-AES256-SHA384","ECDHE-RSA-AES256-SHA384", "ECDHE-ECDSA-DES-CBC3-SHA",
"ECDH-ECDSA-AES256-GCM-SHA384","ECDH-RSA-AES256-GCM-SHA384","ECDH-ECDSA-AES256-SHA384",
"ECDH-RSA-AES256-SHA384","DHE-DSS-AES256-GCM-SHA384","DHE-DSS-AES256-SHA256",
"AES256-GCM-SHA384","AES256-SHA256","ECDHE-ECDSA-AES128-GCM-SHA256",
"ECDHE-RSA-AES128-GCM-SHA256","ECDHE-ECDSA-AES128-SHA256","ECDHE-RSA-AES128-SHA256",
"ECDH-ECDSA-AES128-GCM-SHA256","ECDH-RSA-AES128-GCM-SHA256","ECDH-ECDSA-AES128-SHA256",
"ECDH-RSA-AES128-SHA256","DHE-DSS-AES128-GCM-SHA256","DHE-DSS-AES128-SHA256",
"AES128-GCM-SHA256","AES128-SHA256","ECDHE-ECDSA-AES256-SHA",
"ECDHE-RSA-AES256-SHA","DHE-DSS-AES256-SHA","ECDH-ECDSA-AES256-SHA",
"ECDH-RSA-AES256-SHA","AES256-SHA","ECDHE-ECDSA-AES128-SHA",
"ECDHE-RSA-AES128-SHA","DHE-DSS-AES128-SHA","ECDH-ECDSA-AES128-SHA",
"ECDH-RSA-AES128-SHA","AES128-SHA"]},
{honor_cipher_order, true}, 
