小编P.P*_*ter的帖子

如果我尝试访问具有 certbot 颁发的 debian 9 证书的 HTTPS 服务器，则会收到以下错误：

 # curl -v https://hu.dbpedia.org/
 *   Trying 195.111.2.82...
 * TCP_NODELAY set
 * Connected to hu.dbpedia.org (195.111.2.82) port 443      (#0)
 * ALPN, offering h2
 * ALPN, offering http/1.1
 * Cipher selection:      ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
 * successfully set certificate verify locations:
 *   CAfile: /etc/ssl/certs/ca-certificates.crt
   CApath: /etc/ssl/certs
 * TLSv1.2 (OUT), TLS header, Certificate Status (22):
 * TLSv1.2 (OUT), TLS handshake, Client hello (1):
 * TLSv1.2 (IN), TLS handshake, Server hello (2):
 * TLSv1.2 (IN), TLS handshake, Certificate (11): …

我正在尝试在条件块内插入条件块：

- block:
  - postgresql_db: name={{ dbname }} state=absent
  - postgresql_db: name={{ dbname }}
  ...
  - block:
     - get_url: url={{ remote_database_dump }} dest={{ local_database_dump }}
     - command: pg_restore -d {{ dbname }} {{ local_database_dump }}
    when remote_database_dump != ""
  become: true
  become_user: postgres
  become_method: su
  when: db_recreate == "true"

但我收到一条ERROR! Syntax Error while loading YAML.消息。如果我删除它when remote_database_dump != ""，它就可以正常工作。

这种嵌套可能吗？如果是，怎么办？