There were no mentionable container-solutions before Docker. All we had was VMs. Well, there were jails in FreeBSD and zones in Solaris, and I guess z/OS also had a very enterprisey solution, but none of them were useful for developers.
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There were no mentionable container-solutions before Docker. All we had was VMs. Well, there were jails in FreeBSD and zones in Solaris, and I guess z/OS also had a very enterprisey solution, but none of them were useful for developers.