v0.2.7

What's Changed

• scrape etcd with http mode by @kongfei605 in #125
• supply default dns server by @lsy1990 in #122
• add plugin nfs-client by @lsy1990 in #127
• fix kafka exporter tls config validate: allow no client auth when use… by @ysyneu in #131
• feature: add es alerts by @xiaoziv in #132
• fix: remove useless code by @xiaoziv in #133
• input code refactor by @xiaoziv in #134

Full Changelog: v0.2.6...v0.2.7