For almost two years Mike Rapoport and I have been working on lazy process migration. Lazy process migration (or post-copy migration) is a technique to decrease the process or container downtime during the live migration. I described the basic functionality in the following previous articles:<\/p>\n
Those articles are not 100% correct anymore as we changed some of the parameters during the last two years, but the concepts stayed the same.<\/p>\n
Mike and I started about two years ago to work on it and the latest CRIU<\/a> release (3.5)<\/a> includes the possibility to use lazy migration. Now that the post-copy migration feature has been merged from the criu-dev<\/em> branch to the master<\/em> branch it is part of the normal CRIU releases.<\/p>\n With CRIU’s 3.5 release lazy migration can be used on any kernel which supports userfaultfd<\/a>. I already updated the CRIU packages in Fedora to 3.5 so that lazy process migration can be used just by installing the latest CRIU packages with dnf<\/em> (still in the testing repository right now).<\/p>\n More information about container live migration in our upcoming Open Source Summit Europe talk: Container Migration Around The World<\/a>.<\/p>\n My pull request<\/a> to support lazy migration in runC<\/a> was also recently merged, so that it is now possible to migrate containers using pre-copy migration and post-copy migration. It can also be combined.<\/p>\n Another interesting change about CRIU is that it started as x86_64<\/em> only and now it is also available on aarch64<\/em>, ppc64le<\/em> and s390x<\/em>. The support to run on s390x<\/em> has just been added with the previous 3.4 release and starting with Fedora 27 the necessary kernel configuration options are also active on s390x<\/em> in addition to the other supported architectures.<\/p>\n","protected":false},"excerpt":{"rendered":" For almost two years Mike Rapoport and I have been working on lazy process migration. Lazy process migration (or post-copy migration) is a technique to decrease the process or container downtime during the live migration. I described the basic functionality in the following previous articles: Lazy Process Migration Combining pre-copy and post-copy migration Those articles […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-614","post","type-post","status-publish","format-standard","hentry","category-luges"],"_links":{"self":[{"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/posts\/614","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/comments?post=614"}],"version-history":[{"count":4,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/posts\/614\/revisions"}],"predecessor-version":[{"id":1301,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/posts\/614\/revisions\/1301"}],"wp:attachment":[{"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/media?parent=614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/categories?post=614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/tags?post=614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}