README
¶
Nodebootstrap
Until recently, eksctl provided its own bootstrapping/userdata logic on disk,
over-writing or ignore those which came with the AMIs. This caused numerous headaches
after changes upstream and we got tired of maintaining these extra pieces.
Implementation
For Unmanaged nodes there is an interface:
type Bootstrapper interface {
UserData() (string, error)
}
AMI families Ubuntu, AmazonLinux2, Bottlerocket and Windows all fulfil this.
As of eksctl version 0.45.0 unmanaged nodes of these families, as well as managed nodes (different interface),
will defer to the native bootstrap script which comes built into the image.
This script is found on disk at /etc/eks/bootstrap.sh. UserData will provide a wrapper script
which will set custom values and delegate to the official bootstrap script.
Ubuntu & AmazonLinux2
The bootstrapping "prep" for these 2 are fairly similar. Common setup lives in userdata.go.
Individual scripts are prepped in ubuntu.go and al2.go.
Non-dynamic assets live in assets/.
Both bootstrappers add assets/bootstrap.helper.sh to the node along with either assets/bootstrap.ubuntu.sh
or assets/bootstrap.al2.sh.
The call to UserData will also dynamically add the following:
kubelet-extra.json- user configuration for kubeletdocker-extra.json- extra config for docker daemonkubelet.env- env vars for kubelet
The bootstrap wrapper scripts will use jq and sed to get user and our config into various files,
and then call /etc/eks/bootstrap.sh.
For AL2, enabling either SSM or EFA will add assets/install-ssm.al2.sh or assets/efa.al2.sh.
Troubleshooting
Ubuntu
sudo snap logs kubelet-eks [-n=all/20]
systemctl status docker.service
Files:
/etc/eks/bootstrap.sh
/var/lib/cloud/scripts/eksctl/bootstrap.ubuntu.sh
/etc/kubernetes/kubelet/kubelet-config.json
/etc/docker/daemon.json
AmazonLinux2
Status:
systemctl status kubelet
systemctl status docker
Logs:
journalctl -u kubelet.service
Files:
/etc/eks/bootstrap.sh
/var/lib/cloud/scripts/eksctl/bootstrap.al2.sh
/etc/kubernetes/kubelet/kubelet-config.json
/etc/docker/daemon.json
/var/lib/cloud/scripts/eksctl/efa.al2.sh
/var/lib/cloud/scripts/eksctl/install-ssm.sh
Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func GetClusterDNS ¶ added in v0.55.0
func GetClusterDNS(clusterConfig *api.ClusterConfig) (string, error)
GetClusterDNS returns the DNS address to use
func ProtectTOMLKeys ¶ added in v0.47.0
ProtectTOMLKeys processes a tree finding and replacing dotted keys with quoted keys to retain the configured settings. This prevents TOML parsers from deserializing keys into nested key-value pairs at each dot encountered - which is not uncommon in the context of Kubernetes' labels, annotations, and taints.
Types ¶
type AmazonLinux2 ¶ added in v0.47.0
type AmazonLinux2 struct {
// contains filtered or unexported fields
}
func NewAL2Bootstrapper ¶ added in v0.47.0
func NewAL2Bootstrapper(clusterConfig *api.ClusterConfig, ng *api.NodeGroup) *AmazonLinux2
func (*AmazonLinux2) UserData ¶ added in v0.47.0
func (b *AmazonLinux2) UserData() (string, error)
type Bootstrapper ¶ added in v0.47.0
type Bootstrapper interface {
// UserData returns userdata for bootstrapping nodes
UserData() (string, error)
}
func NewBootstrapper ¶ added in v0.47.0
func NewBootstrapper(clusterConfig *api.ClusterConfig, ng *api.NodeGroup) (Bootstrapper, error)
NewBootstrapper returns the correct bootstrapper for the AMI family
func NewManagedBootstrapper ¶ added in v0.53.0
func NewManagedBootstrapper(clusterConfig *api.ClusterConfig, ng *api.ManagedNodeGroup) Bootstrapper
NewManagedBootstrapper creates a new bootstrapper for managed nodegroups based on the AMI family
type Bottlerocket ¶ added in v0.47.0
type Bottlerocket struct {
// contains filtered or unexported fields
}
func NewBottlerocketBootstrapper ¶ added in v0.47.0
func NewBottlerocketBootstrapper(clusterConfig *api.ClusterConfig, np api.NodePool) *Bottlerocket
func (*Bottlerocket) UserData ¶ added in v0.47.0
func (b *Bottlerocket) UserData() (string, error)
NewUserDataForBottlerocket generates TOML userdata for bootstrapping a Bottlerocket node.
type ManagedAL2 ¶ added in v0.53.0
type ManagedAL2 struct {
// UserDataMimeBoundary sets the MIME boundary for user data
UserDataMimeBoundary string
// contains filtered or unexported fields
}
ManagedAL2 is a bootstrapper for managed Amazon Linux 2 nodegroups
func NewManagedAL2Bootstrapper ¶ added in v0.53.0
func NewManagedAL2Bootstrapper(ng *api.ManagedNodeGroup) *ManagedAL2
NewManagedAL2Bootstrapper creates a new ManagedAL2 bootstrapper
func (*ManagedAL2) UserData ¶ added in v0.53.0
func (m *ManagedAL2) UserData() (string, error)
UserData returns user data for AL2 managed nodegroups
type ManagedBottlerocket ¶ added in v0.72.0
type ManagedBottlerocket struct {
// contains filtered or unexported fields
}
func NewManagedBottlerocketBootstrapper ¶ added in v0.72.0
func NewManagedBottlerocketBootstrapper(clusterConfig *api.ClusterConfig, ng *api.ManagedNodeGroup) *ManagedBottlerocket
NewManagedBottlerocketBootstrapper returns a new bootstrapper for managed Bottlerocket.
func (*ManagedBottlerocket) UserData ¶ added in v0.72.0
func (b *ManagedBottlerocket) UserData() (string, error)
UserData generates TOML userdata for bootstrapping a Bottlerocket node.
type Ubuntu ¶ added in v0.47.0
type Ubuntu struct {
// contains filtered or unexported fields
}
func NewUbuntuBootstrapper ¶ added in v0.47.0
func NewUbuntuBootstrapper(clusterConfig *api.ClusterConfig, np api.NodePool) *Ubuntu
type Windows ¶ added in v0.47.0
type Windows struct {
// contains filtered or unexported fields
}
func NewWindowsBootstrapper ¶ added in v0.47.0
func NewWindowsBootstrapper(clusterConfig *api.ClusterConfig, ng *api.NodeGroup) *Windows
Source Files
Directories