sealer 0.2.1

release note

v0.2.1

• fix run can't init cluster
• add calico ipip config
• support tag and rmi sealer image with id
• support sealer join masters and nodes
• add pre post check
• add Global config
• auto detect network interface
• optimize copy registy data
• fix Client.Timeout
• fix delete after master0 execution
• fix apply retry umount image
• optimize image structure