为什么HAProxy无法加载letsencrypt生成的证书？

HAProxy无法加载letsencrypt生成的.pem文件,为什么会这样？

我看到的错误是:

parsing [/haproxy.cfg:37] : 'bind :443' : unable to load SSL private key from PEM file '/certs/cert0.pem'.

PEM文件的内容是:

-----BEGIN CERTIFICATE----- MIIFCjCCA/KgAwIBAgISATGh2D5ZMcKNqpIqViwd5EZOMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMTAeFw0xNTEyMTcwOTIyMDBaFw0x NjAzMTYwOTIyMDBaMB4xHDAaBgNVBAMTE3N0YWdpbmcubXV6aGFjay5jb20wggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCrV1XqamfHm6tbDYAbnbjRxBw8 pxM/wPdO9RLUk5EmPnYy0XmPrbge93M5hh4qzMA7IGRxRa4xXjmj2nl4y6oLmRzF nqHRBznh0D3u27dOmxk9vgWEGFO423T4W4DW5T6ukw+i2V5zxdtiu9tP7s8qsN7P IxKQ8tPx8NB0PYXTg+DWhPQMZkX3Q63YEJrl6pR1kQ+shOg1WRw08/gfl8YCH0bj AtbSPwwSNzNVylgA2IZX6mTrBYnbXJ5N63Ee/p1e+vw9fqxha4B4qPpNoByvgR27 cIGFjEoBzeS76awPzBnZLWNaVqM3E0YL9riQnAAgYPrqBIofV65GELBjwVRFAgMB AAGjggIUMIICEDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEG CCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFC5MVU7RKuD07ZwP6kGT 49qPO2tFMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMHAGCCsGAQUF BwEBBGQwYjAvBggrBgEFBQcwAYYjaHR0cDovL29jc3AuaW50LXgxLmxldHNlbmNy eXB0Lm9yZy8wLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14MS5sZXRzZW5j cnlwdC5vcmcvMB4GA1UdEQQXMBWCE3N0YWdpbmcubXV6aGFjay5jb20wgf4GA1Ud IASB9jCB8zAIBgZngQwBAgEwgeYGCysGAQQBgt8TAQEBMIHWMCYGCCsGAQUFBwIB FhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCBqwYIKwYBBQUHAgIwgZ4MgZtU aGlzIENlcnRpZmljYXRlIG1heSBvbmx5IGJlIHJlbGllZCB1cG9uIGJ5IFJlbHlp bmcgUGFydGllcyBhbmQgb25seSBpbiBhY2NvcmRhbmNlIHdpdGggdGhlIENlcnRp ZmljYXRlIFBvbGljeSBmb3VuZCBhdCBodHRwczovL2xldHNlbmNyeXB0Lm9yZy9y ZXBvc2l0b3J5LzANBgkqhkiG9w0BAQsFAAOCAQEAmcF6jtx6QWAOQtRLhnuDyViJ 9ISP2mw8Ueq5p3L/oBMebCAjS1qv7bCcHP5RyeaqsGrHclpv090JY44rCppj5oOh OFzzsNqZ5dwLp8vNbPls1Y7ohThVxk5PfMGpfkDwpuZGxUkizB7qQtknjBr6lX2B XX2/IknJnABU2ssh2q77aqeVkHYVWXYG8iNMETUcIys1/Mb7X/FdL1DGRhkS1kN0 geL/+e7pmusHijkSoOP7IXFgTfcnw1DiIPctXmH2/ETcQ5deWVTgOpCTBk0M1+d2 oFFNaePdQXk4iRYlJNrswoZCSgdqqUybvEcJDKvL+ogi6GwZpJCIn/Rc2PWhGQ== -----END CERTIFICATE----- -----BEGIN CERTIFICATE----- MIIEqDCCA5CgAwIBAgIRAJgT9HUT5XULQ+dDHpceRL0wDQYJKoZIhvcNAQELBQAw PzEkMCIGA1UEChMbRGlnaXRhbCBTaWduYXR1cmUgVHJ1c3QgQ28uMRcwFQYDVQQD Ew5EU1QgUm9vdCBDQSBYMzAeFw0xNTEwMTkyMjMzMzZaFw0yMDEwMTkyMjMzMzZa MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMTCCASIwDQYJKoZIhvcNAQEBBQAD ggEPADCCAQoCggEBAJzTDPBa5S5Ht3JdN4OzaGMw6tc1Jhkl4b2+NfFwki+3uEtB BaupnjUIWOyxKsRohwuj43Xk5vOnYnG6eYFgH9eRmp/z0HhncchpDpWRz/7mmelg PEjMfspNdxIknUcbWuu57B43ABycrHunBerOSuu9QeU2mLnL/W08lmjfIypCkAyG dGfIf6WauFJhFBM/ZemCh8vb+g5W9oaJ84U/l4avsNwa72sNlRZ9xCugZbKZBDZ1 gGusSvMbkEl4L6KWTyogJSkExnTA0DHNjzE4lRa6qDO4Q/GxH8Mwf6J5MRM9LTb4 4/zyM2q5OTHFr8SNDR1kFjOq+oQpttQLwNh9w5MCAwEAAaOCAZIwggGOMBIGA1Ud EwEB/wQIMAYBAf8CAQAwDgYDVR0PAQH/BAQDAgGGMH8GCCsGAQUFBwEBBHMwcTAy BggrBgEFBQcwAYYmaHR0cDovL2lzcmcudHJ1c3RpZC5vY3NwLmlkZW50cnVzdC5j b20wOwYIKwYBBQUHMAKGL2h0dHA6Ly9hcHBzLmlkZW50cnVzdC5jb20vcm9vdHMv ZHN0cm9vdGNheDMucDdjMB8GA1UdIwQYMBaAFMSnsaR7LHH62+FLkHX/xBVghYkQ MFQGA1UdIARNMEswCAYGZ4EMAQIBMD8GCysGAQQBgt8TAQEBMDAwLgYIKwYBBQUH AgEWImh0dHA6Ly9jcHMucm9vdC14MS5sZXRzZW5jcnlwdC5vcmcwPAYDVR0fBDUw MzAxoC+gLYYraHR0cDovL2NybC5pZGVudHJ1c3QuY29tL0RTVFJPT1RDQVgzQ1JM LmNybDATBgNVHR4EDDAKoQgwBoIELm1pbDAdBgNVHQ4EFgQUqEpqYwR93brm0Tm3 pkVl7/Oo7KEwDQYJKoZIhvcNAQELBQADggEBANHIIkus7+MJiZZQsY14cCoBG1hd v0J20/FyWo5ppnfjL78S2k4s2GLRJ7iD9ZDKErndvbNFGcsW+9kKK/TnY21hp4Dd ITv8S9ZYQ7oaoqs7HwhEMY9sibED4aXw09xrJZTC9zK1uIfW6t5dHQjuOWv+HHoW ZnupyxpsEUlEaFb+/SCI4KCSBdAsYxAcsHYI5xxEI4LutHp6s3OT2FuO90WfdsIk 6q78OMSdn875bNjdBYAqxUp2/LEIHfDBkLoQz0hFJmwAbYahqKaLn73PAAm1X2kj f1w8DdnkabOLGeOVcj9LQ+s67vBykx4anTjURkbqZslUEUsn2k5xeua2zUk= -----END CERTIFICATE-----

问题是我使用的是letsencrypt生成的fullchain.pem文件.相反,应该将它与'privkey.pem'(也由letsencrypt生成)连接到一个.pem文件中.