how to upgrade certbot from acmev1 to acmev2

0

original

certbot version:0.9.3
centos version:CentOS Linux release 7.0.1406 (Core)

upgrade the certbot version

#sudo yum update certbot

# certbot --version
certbot 1.3.0

upgrade the acme account

#certbot update_account
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Enter email address (used for urgent renewal and security notices) (Enter 'c' to
cancel): xxx@xxx.com
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org

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Would you be willing to share your email address with the Electronic Frontier
Foundation, a founding partner of the Let's Encrypt project and the non-profit
organization that develops Certbot? We'd like to send you email about our work
encrypting the web, EFF news, campaigns, and ways to support digital freedom.
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(Y)es/(N)o: y
Starting new HTTPS connection (1): supporters.eff.org

IMPORTANT NOTES:
 - Your e-mail address was updated to xxx@xxx.com.

check upagrade result

ls /etc/letsencrypt/accounts
acme-staging.api.letsencrypt.org  acme-v01.api.letsencrypt.org  acme-v02.api.letsencrypt.org

you can see the acme-v02 information, it indicate that the upgrade is successful.

done, have fun!