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systemd: build: fix service startup failure when using IMDSv2 #10221

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systemd: build: fix service startup failure when using IMDSv2 #10221

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15 changes: 12 additions & 3 deletions init/az2-sethostname.in
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Original file line number Diff line number Diff line change
@@ -1,12 +1,21 @@
[Unit]
Description=Set Hostname Workaround coreos/bugs#1272
Description=Set Hostname Workaround coreos/bugs#1272 with EC2 IMDSv2 support
Wants=network-online.target
After=network-online.target

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/sh -c "/usr/bin/hostnamectl set-hostname $(curl -s http://169.254.169.254/latest/meta-data/hostname)"

ExecStartPre=/bin/sh -c 'curl -sX PUT "http://169.254.169.254/latest/api/token" \
-H "X-aws-ec2-metadata-token-ttl-seconds: 21600" > /run/imds_token'

ExecStartPre=/bin/sh -c 'curl -s "http://169.254.169.254/latest/meta-data/hostname" \
-H "X-aws-ec2-metadata-token: $(cat /run/imds_token)" > /run/ec2_hostname'

ExecStart=/bin/sh -c '/usr/bin/hostnamectl set-hostname "$(cat /run/ec2_hostname)"'

ExecStartPost=/bin/sh -c 'rm -f /run/imds_token /run/ec2_hostname'

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