templates

Documentation

Index

• Variables
• func BackupTimeOnCalendar(period int) string

Variables

var (
	// BackupETCDService defines the template of backup-etcd service for systemd.
	BackupETCDService = template.Must(template.New("backup-etcd.service").Parse(
		dedent.Dedent(`[Unit]
Description=Backup ETCD
[Service]
Type=oneshot
ExecStart={{ .ScriptPath }}
    `)))

	// BackupETCDTimer defines the template of backup-etcd timer for systemd.
	BackupETCDTimer = template.Must(template.New("backup-etcd.timer").Parse(
		dedent.Dedent(`[Unit]
Description=Timer to backup ETCD
[Timer]
{{- if .OnCalendarStr }}
OnCalendar={{ .OnCalendarStr }}
{{- else }}
OnCalendar=*-*-* 02:00:00
{{- end }}
Unit=backup-etcd.service
[Install]
WantedBy=multi-user.target
    `)))
)

var (
	// ETCDService defines the template of etcd's service for systemd.
	ETCDService = template.Must(template.New("etcd.service").Parse(
		dedent.Dedent(`[Unit]
Description=etcd
After=network.target

[Service]
User=root
Type=notify
Nice=-20
OOMScoreAdjust=-1000
EnvironmentFile=/etc/etcd.env
ExecStart=/usr/local/bin/etcd
NotifyAccess=all
RestartSec=10s
LimitNOFILE=40000
Restart=always

[Install]
WantedBy=multi-user.target
    `)))
)

var EtcdBackupScript = template.Must(template.New("etcd-backup.sh").Parse(
	dedent.Dedent(`#!/bin/bash

set -o errexit
set -o nounset
set -o pipefail

ETCDCTL_PATH='/usr/local/bin/etcdctl'
ENDPOINTS='{{ .Etcdendpoint }}'
{{- if .DataDir }}
ETCD_DATA_DIR="{{ .DataDir }}"
{{- else }}
ETCD_DATA_DIR="/var/lib/etcd"
{{- end }}
BACKUP_DIR="{{ .Backupdir }}/etcd-$(date +%Y-%m-%d-%H-%M-%S)"
KEEPBACKUPNUMBER='{{ .KeepbackupNumber }}'
ETCDBACKUPSCIPT='{{ .EtcdBackupScriptDir }}'

ETCDCTL_CERT="/etc/ssl/etcd/ssl/admin-{{ .Hostname }}.pem"
ETCDCTL_KEY="/etc/ssl/etcd/ssl/admin-{{ .Hostname }}-key.pem"
ETCDCTL_CA_FILE="/etc/ssl/etcd/ssl/ca.pem"

[ ! -d $BACKUP_DIR ] && mkdir -p $BACKUP_DIR

export ETCDCTL_API=2;$ETCDCTL_PATH backup --data-dir $ETCD_DATA_DIR --backup-dir $BACKUP_DIR

sleep 3

{
export ETCDCTL_API=3;$ETCDCTL_PATH --endpoints="$ENDPOINTS" snapshot save $BACKUP_DIR/snapshot.db \
                                   --cacert="$ETCDCTL_CA_FILE" \
                                   --cert="$ETCDCTL_CERT" \
                                   --key="$ETCDCTL_KEY"
} > /dev/null 

sleep 3

cd $BACKUP_DIR/../ && ls -lt |awk '{if(NR > '$KEEPBACKUPNUMBER'){print "rm -rf "$9}}'|sh

`)))

EtcdBackupScriptTmpl defines the template of etcd backup script.

var EtcdEnv = template.Must(template.New("etcd.env").Parse(
	dedent.Dedent(`# Environment file for etcd {{ .Tag }}
{{- if .DataDir }}
ETCD_DATA_DIR={{ .DataDir }}
{{- else }}
ETCD_DATA_DIR=/var/lib/etcd
{{- end }}
ETCD_ADVERTISE_CLIENT_URLS=https://{{ .Ip }}:2379
ETCD_INITIAL_ADVERTISE_PEER_URLS=https://{{ .Ip }}:2380
ETCD_INITIAL_CLUSTER_STATE={{ .State }}
ETCD_METRICS=basic
ETCD_LISTEN_CLIENT_URLS=https://{{ .Ip }}:2379,https://127.0.0.1:2379
ETCD_INITIAL_CLUSTER_TOKEN=k8s_etcd
ETCD_LISTEN_PEER_URLS=https://{{ .Ip }}:2380
ETCD_NAME={{ .Name }}
ETCD_PROXY=off
ETCD_ENABLE_V2=true
ETCD_INITIAL_CLUSTER={{ .PeerAddresses }}
{{- if .ElectionTimeout }}
ETCD_ELECTION_TIMEOUT={{ .ElectionTimeout }}
{{- else }}
ETCD_ELECTION_TIMEOUT=5000
{{- end }}
{{- if .HeartbeatInterval }}
ETCD_HEARTBEAT_INTERVAL={{ .HeartbeatInterval }}
{{- else }}
ETCD_HEARTBEAT_INTERVAL=250
{{- end }}
{{- if .CompactionRetention  }}
ETCD_AUTO_COMPACTION_RETENTION={{ .CompactionRetention }}
{{- else }}
ETCD_AUTO_COMPACTION_RETENTION=8
{{- end }}
{{- if .SnapshotCount }}
ETCD_SNAPSHOT_COUNT={{ .SnapshotCount }}
{{- else }}
ETCD_SNAPSHOT_COUNT=10000
{{- end }}
{{- if .Metrics }}
ETCD_METRICS={{ .Metrics }}
{{- end }}
{{- if .QuotaBackendBytes }}
ETCD_QUOTA_BACKEND_BYTES={{ .QuotaBackendBytes }}
{{- end }}
{{- if .MaxRequestBytes }}
ETCD_MAX_REQUEST_BYTES={{ .MaxRequestBytes }}
{{- end }}
{{- if .MaxSnapshots }}
ETCD_MAX_SNAPSHOTS={{ .MaxSnapshots }}
{{- end }}
{{- if .MaxWals }}
ETCD_MAX_WALS={{ .MaxWals }}
{{- end }}
{{- if .LogLevel }}
ETCD_LOG_LEVEL={{ .LogLevel }}
{{- end }}
{{- if .UnsupportedArch }}
ETCD_UNSUPPORTED_ARCH={{ .Arch }}
{{ end }}

# TLS settings
ETCD_TRUSTED_CA_FILE=/etc/ssl/etcd/ssl/ca.pem
ETCD_CERT_FILE=/etc/ssl/etcd/ssl/member-{{ .Hostname }}.pem
ETCD_KEY_FILE=/etc/ssl/etcd/ssl/member-{{ .Hostname }}-key.pem
ETCD_CLIENT_CERT_AUTH=true

ETCD_PEER_TRUSTED_CA_FILE=/etc/ssl/etcd/ssl/ca.pem
ETCD_PEER_CERT_FILE=/etc/ssl/etcd/ssl/member-{{ .Hostname }}.pem
ETCD_PEER_KEY_FILE=/etc/ssl/etcd/ssl/member-{{ .Hostname }}-key.pem
ETCD_PEER_CLIENT_CERT_AUTH=true

# CLI settings
ETCDCTL_ENDPOINTS=https://127.0.0.1:2379
ETCDCTL_CACERT=/etc/ssl/etcd/ssl/ca.pem
ETCDCTL_KEY=/etc/ssl/etcd/ssl/admin-{{ .Hostname }}-key.pem
ETCDCTL_CERT=/etc/ssl/etcd/ssl/admin-{{ .Hostname }}.pem
    `)))

EtcdEnv defines the template of etcd's env.

Functions

func BackupTimeOnCalendar

func BackupTimeOnCalendar(period int) string