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authorDrew Blessing <drew@gitlab.com>2017-05-17 10:04:07 -0500
committerDrew Blessing <drew@gitlab.com>2017-05-17 14:37:47 -0500
commit65382a9763c604799f34ef7e0b3839fc707ffdc4 (patch)
treee56b976430b03f699dd09c69b7d324e2ed09473e
parentdaf9ec6cd1f88e7462cae9dc68eda2dcf793cecf (diff)
downloadgitlab-ce-65382a9763c604799f34ef7e0b3839fc707ffdc4.tar.gz
Consolidate opening text from about.gitlab.com and add active/passive note
Add opening text that was previously on https://about.gitlab.com/high-availability and add a note that active/passive is compatible but not supported.
-rw-r--r--doc/administration/high_availability/README.md18
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/administration/high_availability/README.md b/doc/administration/high_availability/README.md
index d5a5aef7ec0..4d3be0ab8f6 100644
--- a/doc/administration/high_availability/README.md
+++ b/doc/administration/high_availability/README.md
@@ -5,6 +5,20 @@ The solution you choose will be based on the level of scalability and
availability you require. The easiest solutions are scalable, but not necessarily
highly available.
+GitLab provides a service that is usually essential to most organizations: it
+enables people to collaborate on code in a timely fashion. Any downtime should
+therefore be short and planned. Luckily, GitLab provides a solid setup even on
+a single server without special measures. Due to the distributed nature
+of Git, developers can still commit code locally even when GitLab is not
+available. However, some GitLab features such as the issue tracker and
+Continuous Integration are not available when GitLab is down.
+
+**Keep in mind that all Highly Available solutions come with a trade-off between
+cost/complexity and uptime**. The more uptime you want, the more complex the
+solution. And the more complex the solution, the more work is involved in
+setting up and maintaining it. High availability is not free and every HA
+solution should balance the costs against the benefits.
+
## Architecture
There are two kinds of setups:
@@ -37,6 +51,10 @@ Block Device) to keep all data in sync. DRBD requires a low latency link to
remain in sync. It is not advisable to attempt to run DRBD between data centers
or in different cloud availability zones.
+> **Note:** GitLab recommends against choosing this HA method because of the
+ complexity of managing DRBD and crafting automatic failover. This is
+ *compatible* with GitLab, but not officially *supported*.
+
Components/Servers Required: 2 servers/virtual machines (one active/one passive)
![Active/Passive HA Diagram](../img/high_availability/active-passive-diagram.png)