Since 2020, Carrefour has developed a strategy move to the cloudwhich will run until 2026. “Our problem is we have heterogeneous systems, and most of them are pretty old. To migrate all these applications to the cloud, we chose one move.”lift-and-shift“applications without touching them and not making them cloud native, but simply moving them from a physical server to a virtual server”summarizes Damien Cazenave, CTO and CISO of Carrefour.
VM selectionmerchandiseGoogle Cloud VMware Engine (GCVE), is a simple option for the distribution brand to migrate its VMware applications to the cloud on the premisebefore the possible redevelop applications and make them cloud-native.
Carrefour has found that it would be cheaper to keep existing applications what they are, than to rebuild them. We are talking about almost a thousand applications. “The new applications we will make are cloud-native using containerization technologies, but for software that has been around for decades, it’s easier for us to move them like in the cloud, to reduce our coinfrastructure and operating costs, and improve availability compared to a Hclassic dwelling on the premise »gives Damien Cazenave.
Applications that remain on premise
A strong relationship with Google may eyoue signa few years agoayeven if Carrefour works in other clouds provider na is the Microsoft Azure and Oracle Cloud for Oracle Databases. “It made sense to go to Google, because of our partnership, and the technological choice made. Google has been instrumental in our digital transformation, especially in use cases stores, customers, etc. »justifies Damien Cazenave.
Currently, 57% of applications migrated to the cloud, with a target of 100%. Legacy software will be decommissioned (or included as features in broader spectrum applications) by 2027. Additionally, some technical tools cannot be ported to the cloud and will remain in places. As the project unfolds over the next 5 years, Carrefour is gradually moving its applications. It also avoids the rush to take advantage of any new offers from third-party publishers.
Economy and flexibility
The main reason for this lift-and-shift is economics. But cloud flexibility in terms of resources and system stability also plays a role. “We had a few data centers to maintain ourselves, or outsource, which requires a lot of human energy, especially when a data center needs to be extended. Ease of cloud management is another argument “mentioned Damien Cazenave.
However, in the long run, the cloud is not necessarily cheaper: “We are rather ahead of the game that is, adapting cloud resources so that they consume only what is strictly necessary ”, Explain Damien Cazenave. The machines are turned off at night, autoscaling according to requests sent to them. A team trains operators to stay as close as possible to CPU power and uptime requirements. On a scale similar to Carrefour, Carrefour would lose millions of euros without this group.
Today, 9,000 servers operate at Carrefour – including 57% in the Google cloud, therefore). Carrefour previously operated 6 datacenters. Lthe new virtual machines are hosted in Google datacenters located in Europe, for proximity reasons, but also for regulatory reasons.
Azure for Commerce
Security -related promotions and apps work with GCP – including , since 2017, for the group around the world, for cost issues and especially for collaborative functions. But Carrefour isn’t locked into Google: the commerce side works in Azure.
For this one, the Covid is an accelerator, for driving, home delivery and pedestrian drive. especially. Today, e-commerce is the subject of strong development, especially to deliver faster. “We felt we were providing more service than ever before, and the delivery and drive-through were large accelerators »alleviates Damien Cazenave.