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kubeadm: increase timeouts in the etcd client

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- Extend the exponential backoff for add/remove/... retry to
11 steps ~=106 seconds. From experiments for 3 and more members
the race can take more that ~=26 seconds.
- Increase the dialTimeout for client creation to 40 seconds.
20 seconds seems racy for 3 and more members.
This commit is contained in:
Lubomir I. Ivanov 2020-01-24 02:13:18 +02:00
parent 5e0c0779a1
commit a027c379f7
1 changed files with 3 additions and 3 deletions
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6
cmd/kubeadm/app/util/etcd/etcd.go
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@ -42,7 +42,7 @@ const etcdTimeout = 2 * time.Second
// Exponential backoff for etcd operations // Exponential backoff for etcd operations
var etcdBackoff = wait.Backoff{ var etcdBackoff = wait.Backoff{
Steps: 9, Steps: 11,
Duration: 50 * time.Millisecond, Duration: 50 * time.Millisecond,
Factor: 2.0, Factor: 2.0,
Jitter: 0.1, Jitter: 0.1,
@ -128,9 +128,9 @@ func NewFromCluster(client clientset.Interface, certificatesDir string) (*Client
} }
// dialTimeout is the timeout for failing to establish a connection. // dialTimeout is the timeout for failing to establish a connection.
// It is set to 20 seconds as times shorter than that will cause TLS connections to fail // It is set to >20 seconds as times shorter than that will cause TLS connections to fail
// on heavily loaded arm64 CPUs (issue #64649) // on heavily loaded arm64 CPUs (issue #64649)
const dialTimeout = 20 * time.Second const dialTimeout = 40 * time.Second
// Sync synchronizes client's endpoints with the known endpoints from the etcd membership. // Sync synchronizes client's endpoints with the known endpoints from the etcd membership.
func (c *Client) Sync() error { func (c *Client) Sync() error {